WO2021083297A1

WO2021083297A1 - Intervention instrument release control mechanism, release method, and intervention instrument delivery system

Info

Publication number: WO2021083297A1
Application number: PCT/CN2020/124966
Authority: WO
Inventors: 雷荣军; 吴世广; 陈锐; 赵曼曼
Original assignee: 杭州启明医疗器械股份有限公司
Priority date: 2019-10-31
Filing date: 2020-10-29
Publication date: 2021-05-06
Also published as: WO2021083296A1; CN114650795A; CN114641264A

Abstract

An intervention instrument release control mechanism, a release method, and an intervention instrument delivery system. The intervention instrument release control mechanism comprises a first tube (11), a middle tube (13), and a second tube (12) which are fitted from the inside to the outside in a sliding manner, the distal end of the first tube (11) extends out of the middle tube (13), and a mounting head (112) for connecting with an intervention instrument is provided on the extended out portion; a flexible control member is connected to the middle tube (13); the control member has a holding state in which the control member passes through the mounting head (112) and constrains the intervention instrument to the mounting head (112), and an open state in which the intervention instrument is allowed to be completely disengaged from the mounting head (112); the middle tube (13) is provided with a lock member (162) fitted with the control member, and the lock member (162) is in sliding fit with respect to the middle tube (13) and switches the different states of the control member when sliding. For an intervention instrument delivery system, the release manner of an intervention instrument is improved, allowing more convenient operation.

Description

Interventional device release control mechanism, release method and interventional device delivery system

Technical field

This application relates to the field of medical devices, in particular to interventional device release control mechanisms, release methods, and interventional device delivery systems.

Background technique

Interventional instrument delivery systems generally include a control handle arranged at the proximal end, that is, on the operator’s side. A number of slender pipe fittings slide and nest inside and outside. The proximal end of each pipe fitting is the control end and is connected to the control handle, and the distal end of each pipe fitting is working The end can be inserted into the body and complete the delivery, release or recovery of interventional instruments through mutual cooperation. The control handle can generally be provided with sliding or rotating parts, and then drive the relative movement between the pipes in the axial direction. Most of the existing control handles are controlled by mechanical means. With the development of interventional devices, more requirements are put forward for the functions of interventional devices.

Some existing technologies have improved the release and recovery of interventional devices, and introduced more active control by means of wire control, but there is still a need for improvement in the control method, degree, and direction of related actions.

Summary of the invention

This application aims at the existing interventional device delivery system, further improves the release method of the interventional device, and is more convenient to operate.

The present application provides an interventional device release control mechanism, which includes a first tube, an intermediate tube, and a second tube that are slidably nested and fitted from the inside to the outside. The distal end of the first tube extends out of the middle tube, and The extended part is provided with a mounting head for connecting interventional instruments, and a flexible control member is connected to the intermediate tube, and the control member has:

In the holding state, in the holding state, the control member penetrates the mounting head and binds the interventional instrument to the mounting head;

The open state allows the interventional instrument to be completely separated from the mounting head;

The intermediate pipe is installed with a lock that cooperates with the control piece, and the lock is slidingly fitted with the intermediate pipe and switches different states of the control piece when sliding.

Several alternative methods are also provided below, but they are not intended as additional limitations to the above-mentioned overall scheme. They are merely further additions or optimizations. Without technical or logical contradiction, each alternative method can be carried out separately for the above-mentioned overall scheme. Combination can also be a combination of multiple alternatives.

Optionally, the control member is a lashing wire, and the proximal end of the interventional instrument is provided with a plurality of connecting ears, and in the holding state, the lashing wire directly passes through and pulls each connecting ear; or the connecting ears are inserted between the connecting ears. There is an annular wire sleeve, and in the holding state, the lashing wire bypasses the annular wire sleeve and indirectly pulls the connecting ear through the annular wire sleeve.

Optionally, there are multiple binding wires, and the pulling positions of each binding wire and the annular wire sleeve are evenly distributed along the circumferential direction of the interventional instrument.

Optionally, when the intermediate pipe piece moves relative to the first pipe piece, the lock piece is triggered by the mounting head and releases the control piece into an open state.

Optionally, when the intermediate tube moves relative to the first tube, the direction of movement of the intermediate tube is from the proximal end to the distal end.

Optionally, the manner in which the lock member is triggered by the mounting head is directly abutting or indirectly applying force through a transmission component.

Optionally, when the lock is triggered by the mounting head, the movement direction of the lock is from the distal end to the proximal end.

Optionally, the intermediate tube is on the proximal side of the mounting head, the interventional instrument is on the distal side of the mounting head, and the mounting head is provided with a converging guide hole, and the converging guide hole The control member is passed through to connect the interventional instrument, and the proximal side of the interventional instrument is restricted to the constriction guide hole in the holding state.

Optionally, in the holding state, the control member is guided back and forth relative to the mounting head, and at least one of the back and forth path passes through the converging guide hole.

Optionally, both the forward and return paths pass through the converging guide hole.

Optionally, there are one or more control elements, and for the same control element, the back and forth paths pass through the same converging guide hole.

Optionally, the mounting head is cylindrical and has an axial through hole, and the first pipe penetrates the axial through hole.

Optionally, the mounting head and the first pipe are fixed to each other by at least one of welding, bonding, interference fit, and auxiliary connecting member.

Optionally, there are a plurality of the constriction guide holes, the proximal side of the interventional instrument is provided with connecting ears for piercing the control member, the connecting ears are divided into multiple groups, and the interventional instrument is released, The connecting ears of the same group are gathered to a corresponding converging guide hole.

Optionally, a plurality of converging guide holes are evenly distributed along the circumferential direction of the mounting head.

Optionally, the number of the converging guide holes is 2 to 4.

Optionally, the converging guide hole extends along the axial direction of the first pipe and penetrates the mounting head.

Optionally, the constriction guide hole has a guide flaring at the opening on the distal side.

Optionally, a fixed base and a slidable movable seat are installed on the intermediate pipe, and a lock and an unlocking rod are fixed on the movable seat, and the unlocking rod penetrates the base and passes through the One end of the base serves as a trigger end, and a lock hole for receiving the lock is opened on the base;

The control member is sleeved on the lock member in the holding state, and the end of the lock member is inserted into the lock hole. When the middle tube member moves distally with respect to the first tube member, the The trigger end of the unlocking lever abuts against the mounting head and drives the lock member to move proximally out of the lock hole, so that the control member enters an open state.

Optionally, the movable seat includes:

An annular part, which is slidably sleeved on the intermediate tube and located on the proximal side of the base;

The lock is rod-shaped and extends from the ring portion to the distal end

The unlocking lever extends from the ring portion to the distal end, and the extension length is longer than the lock piece.

Optionally, one end of the binding wire is provided with a fixed wire loop, and the other end is provided with a movable wire loop;

In the holding state, the fixed wire loop is sleeved on the unlocking lever, and the movable wire loop is sleeved on the lock;

In the open state, the fixed wire loop is sleeved on the unlocking lever, and the movable wire loop is separated from the lock member.

Optionally, the control member is a lashing line;

In the holding state, the lashing wire is directly or indirectly passed through the interventional device, and both ends of the lashing wire are relatively fixed to the lock;

In the open state, at least one end of the binding wire and the lock are separated from each other to release the restraint on the interventional instrument.

Optionally, in the holding state, the base and the movable seat are tightly fitted, and when the intermediate tube moves distally relative to the first tube, the movable seat follows the base until The trigger end of the unlocking lever abuts against the mounting head.

Optionally, a guide hole for the unlocking rod to penetrate is provided on the base, and in an open state, at least a part of the unlocking rod is kept in the guide hole.

Optionally, the base is provided with an axial channel, the distal end of the intermediate tube is inserted and fixed in the axial channel, and the base includes:

The proximal plate is provided with escape holes for the lock member and the unlocking rod to pass through respectively;

The distal end plate is provided with a lock hole matched with the lock piece and a guide hole for the unlocking rod to penetrate;

The transition section is fixedly connected between the proximal disk and the distal disk.

Optionally, the proximal disk is provided with a accommodating groove on the side facing the ring portion, the lock member and the proximal end of the unlocking lever are connected by a ring portion, and the ring portion is in the holding state. In the accommodating groove, the escape hole is opened at the bottom of the accommodating groove.

Optionally, the lock member and the unlocking lever are alternately arranged at intervals.

Optionally, there are two lock members and two unlocking levers, and they are alternately arranged at even intervals.

Optionally, the outer periphery of the transition section is a mating area that is radially inwardly retracted relative to the proximal disc and the distal disc. In the holding state, the lashing line and the lock and the unlocking lever The connecting parts are all in the matching area.

Optionally, in the open state, the lock member exits the lock hole until the distal part of the lock member is adjacent to the proximal disc.

Optionally, the outer periphery of the distal end plate is provided with a wire passing groove for the lashing wire to pass through.

Optionally, the wire passing groove is opened on the outer circumference of the distal disk.

Optionally, a support sleeve is fixed on the intermediate pipe, and the outer wall of the support sleeve is close to the inner wall of the second pipe.

Optionally, the support sleeve is located at the proximal end of the base and arranged at intervals, and the sliding stroke of the movable seat is limited between the support sleeve and the base. The support sleeve is provided with a first guide surface whose diameter is gradually reduced from the distal end to the proximal end on the side facing the proximal end.

Optionally, the support sleeve is provided with a second guide surface whose diameter gradually decreases from the proximal end to the distal end on the side facing the distal end, and the movable seat is in contact with the second guide surface when the movable seat moves to the proximal end to the extreme position. Offset each other.

Of course, when combined with the aforementioned hydraulically-driven control handles, the present application also provides an interventional instrument delivery system, including a release control mechanism adopting the aforementioned structure, and a control handle that drives the release control mechanism to release the proximity of each tube in the control mechanism. The end is connected to the control handle, and the relative movement of the various pipe fittings is driven hydraulically at the control handle.

The present application also provides a method for releasing an interventional device, wherein the interventional device is loaded into a release control mechanism, and the release control mechanism includes a first tube, an intermediate tube, and a second tube that are slidably nested and fitted from the inside to the outside. The distal end of the first pipe piece extends out of the intermediate pipe piece, and a mounting head for connecting interventional instruments is provided on the extended portion, and the intermediate pipe piece is connected with a flexible control piece and a lock that cooperates with the control piece. The proximal end of the interventional instrument is bound to the mounting head by the control part in a compressed state, and the interventional instrument is wrapped by the second tube;

The release method includes:

Relative to the first tube, sliding the second tube proximally until the interventional instrument is completely exposed;

Relative to the first tube, sliding the intermediate tube distally to make the control member follow the distal end and allow the proximal end of the interventional instrument to gradually move away from the mounting head;

The lock member is driven to move to release the control member, so that the interventional device is completely released.

The release method of the present application can be combined with the release control mechanism of the present application and the interventional device delivery system.

Optionally, a fixed base and a sliding movable seat are installed on the intermediate pipe, and a lock and an unlocking rod are fixed on the movable seat, and the unlocking rod penetrates the base from the proximal end to the distal end. The end of the base that passes through the base is used as the trigger end, and the base is provided with a lock hole for receiving the lock;

The control member is sleeved on the lock member in the holding state, and the end of the lock member is inserted into the lock hole;

There is a tight fit between the base and the movable seat, and when the intermediate tube is slid distally relative to the first tube, the movable seat follows the base and causes the control member to follow the distal end.

Optionally, the way of driving the lock member to release the control member is to slide the middle tube member distally relative to the first tube member until the trigger end of the unlocking lever abuts the mounting head;

Further slide the intermediate tube to the distal end, so that the unlocking lever drives the movable seat away from the base under the blocking of the mounting head, and drives the lock member to exit the lock hole, so that the control member is freed.

Optionally, a support sleeve is fixed on the intermediate pipe, the outer wall of the support sleeve is close to the inner wall of the second pipe, the support sleeve is located at the proximal end of the base and is arranged at intervals, the When the intermediate tube is further slid to the distal end, until the movable seat abuts against the supporting sleeve, or until the base abuts against the mounting head.

Optionally, after the interventional device is completely released, the release control mechanism is retracted to the proximal end.

Optionally, when retracting the release control mechanism toward the proximal end, first slide the intermediate tube proximally relative to the first tube to separate the base from the mounting head;

Then, the first pipe and the intermediate pipe are housed back into the second pipe, and all pipes are retracted to the proximal end synchronously.

Optionally, a control handle is used at the proximal end to hydraulically drive the relative movement of each tube. Optionally, the control handle is provided with a first cylinder barrel and a second cylinder barrel that are sequentially butted along the axial direction, wherein a first piston is slidably mounted in the first cylinder barrel, and a first piston is slidably mounted in the second cylinder barrel. Second piston

All the pipes enter from the distal end of the first cylinder. The first pipe is fixed to the first piston. After the intermediate pipe extends out of the first piston, it enters the second cylinder through the isolation seal and is connected to the second cylinder. The second piston is fixed, and the first tube is fixed to the proximal end of the second cylinder after extending out of the second piston;

The control handle is also provided with a hydraulic drive circuit for driving the relative movement of each pipe through the piston.

Optionally, before releasing the control member, the interventional device is adjusted, including:

Relative to the first tube, sliding the intermediate tube proximally to make the control member pull the interventional instrument until the proximal end of the interventional instrument is constricted;

Relative to the first tube, the second tube is slid distally, so that at least a part of the interventional instrument is received in the second tube.

Optionally, the control member is a lashing line;

Before release, the lashing wire is directly or indirectly passed through the interventional device, and both ends of the lashing wire are relatively fixed to the lock;

After being released, at least one end of the binding wire is separated from the lock member to release the restraint on the interventional instrument.

Optionally, one end of the lashing wire is provided with a fixed wire loop and the other end is provided with a movable wire loop; the fixed wire loop is sleeved on the unlocking lever, and the movable wire loop is sleeved on the lock;

Or, one end of the binding wire is fixed with the base or the mounting head, and the other end is a movable wire loop, which is sleeved on the lock piece.

Optionally, a guide hole is provided on the mounting head, and the guide hole is used for the lashing wire to pass through to connect the interventional instrument.

Optionally, the interventional device is a vena cava valve.

Optionally, the proximal end of the interventional instrument is provided with an annular wire sleeve that cooperates with the control member.

The present application also provides an interventional instrument delivery system, including a release control mechanism adopting the aforementioned structure, and a control handle for driving the release control mechanism. The proximal end of each tube in the release control mechanism is connected to the control handle. The relative movement of various pipe fittings is driven hydraulically.

The present application also provides an interventional instrument delivery system, including a release control mechanism and a control handle for driving the release control mechanism. The proximal end of each tube in the release control mechanism is connected to the control handle, and each tube is hydraulically driven at the control handle. Relative movement; wherein the interventional instrument is loaded to the release control mechanism, the release control mechanism includes a first tube, an intermediate tube, and a second tube that are slidably nested and fitted from the inside to the outside, and the distal end of the first tube extends The intermediate tube is drawn out, and the extended part is provided with a mounting head for connecting the interventional instrument. The intermediate tube is connected with a flexible control part and a lock matched with the control part. The proximal end of the interventional instrument is at In the compressed state, the control member is bound to the mounting head, and the interventional instrument is wrapped by the second tube;

When the interventional device is released:

Relative to the first tube, slide the second tube proximally until the interventional device is completely exposed;

Relative to the first tube, sliding the intermediate tube to the distal end, so that the control member travels to the distal end and allows the proximal end of the interventional instrument to gradually move away from the mounting head;

The lock member is driven to move and the control member is released, so that the interventional instrument is completely released from the mounting head.

Optionally, the control handle is provided with one or more cylinders, the cylinders are internally hydraulic chambers, and pistons are slidably installed in each hydraulic chamber, and the two pipes adjacent to each other in the radial direction include an outer pipe and an inner pipe. , The outer pipe piece enters the hydraulic cavity and is fixed with the piston in the hydraulic cavity, and the inner pipe piece is extended to connect to the piston of other hydraulic cavity or fixed to the control handle.

Optionally, the multiple pipes include a first pipe, an intermediate pipe, and a second pipe arranged in sequence from the inside out, the proximal end of each pipe can move relatively, and the proximal end of the first pipe is fixedly installed with respect to the handle , The proximal ends of the intermediate tube and the second tube are respectively fixed to the corresponding pistons.

Optionally, the distal end of the first tube is used to connect an interventional instrument;

The distal end of the intermediate pipe is fixedly connected to the first pipe for traction and bending, or the distal end of the intermediate pipe can move relative to the first pipe and the distal end of the intermediate pipe is provided with an interventional instrument A lock confined to the first tube;

The distal end of the second tube is used to wrap or release the interventional instrument; the cylinder includes a first cylinder and a second cylinder that are sequentially butted along the axial direction, wherein a first piston is slidably mounted in the first cylinder , A second piston is slidably installed in the second cylinder;

All the pipes enter from the distal end of the first cylinder. The first pipe is fixed to the first piston. After the intermediate pipe extends out of the first piston, it enters the second cylinder via an isolation seal and is connected to the The second piston is fixed, and the first tube is fixed to the proximal end of the second cylinder after extending out of the second piston.

Optionally, a distal hydraulic chamber is provided at the distal end of the catheter system to drive the release of the interventional instrument; a distal piston is slidably installed in the distal hydraulic chamber, and the interventional instrument is detachably connected to the distal piston .

Optionally, the control handle includes a working part for installing the cylinder and a holding part connected to the working part, the working part has opposite distal and proximal ends, and the holding part is connected to the working part. The near end of the working department.

Optionally, the control handle is also provided with a hydraulic drive circuit for driving the relative movement of each pipe through the piston; the hydraulic drive circuit includes:

Hydraulic pipelines are used to provide liquid channels communicating with the hydraulic chambers;

A driving pump, which is connected with the hydraulic pipeline to drive the flow of liquid;

The control valve is connected with the hydraulic pipeline to control the flow direction of the liquid.

Optionally, the hydraulic drive circuit further includes a liquid storage tank connected with the hydraulic pipeline to temporarily store liquid.

The control valve includes:

The multi-way switching valve has a drive side interface communicating with the inlet and outlet of the drive pump, and a plurality of working side interfaces, wherein every two working side interfaces are connected to one of the hydraulic chambers, the multi-way switching valve It has multiple gears and is used to switch the communication relationship between the driving side interface and different working side interfaces to control the liquid flow direction.

Optionally, the control valve further includes:

Two one-way valves, the outlet of the drive pump is connected to one of the drive-side ports through the first one-way valve; the inlet of the drive pump is connected to the other drive-side port through the second one-way valve and the liquid storage tank in turn;

The multi-way switching valve is embedded in the control handle, and the control handle is provided with a mark indicating the gear position of the multi-way switching valve.

Optionally, a protective tube is sheathed on the outermost circumference of the multiple pipe fittings, the proximal end of the protective pipe is connected to the fixing sleeve, and the outermost pipe fitting of the multiple pipe fittings is connected to the protective pipe The radial gap therebetween is an exhaust gap, and the side wall of the fixed sleeve is provided with an exhaust hole communicating with the exhaust gap.

Optionally, the cylinder includes a first cylinder and a second cylinder that are sequentially docked from the distal end to the proximal end, wherein a first piston is slidably mounted in the first cylinder, and the second cylinder is A second piston is slidably installed in the cylinder, and a plurality of pipe fittings include a first pipe fitting, an intermediate pipe fitting and a second pipe fitting coaxially arranged from the inside to the outside;

All pipes enter from the distal end of the first cylinder, wherein the first pipe is fixed to the first piston, and the intermediate pipe extends out of the first piston, enters the second cylinder, and is connected to the second cylinder. The second piston is fixed, and the first tube is fixed to the proximal end of the second cylinder after extending out of the second piston.

Optionally, the protective tube is fixedly inserted into one axial end of the fixed sleeve, and the other axial end of the fixed sleeve is a connecting end, which is inserted into the distal end of the cylinder and is connected to the The cylinder barrel is fixed by a buckle, and the outer circumference of the connecting end is sleeved with a distal sealing plug that matches with the inner wall of the cylinder barrel;

An escape hole is provided on the distal end sealing plug, and the outermost tube of the plurality of pipes is in sliding and sealing fit with the escape hole.

Optionally, the connecting end is provided with an outer flange, and the distal end sealing plug is sleeved on the outer flange.

Optionally, the outer periphery of the distal end sealing plug is provided with at least two convex rings spaced apart in the axial direction, and each convex ring is in sealing engagement with the inner wall of the cylinder barrel.

Optionally, a positioning groove is provided on the outer periphery of the fixing sleeve, and the control handle has two half-shells that are buckled with each other, and the edges of the two half-shells are clamped into the positioning groove.

Optionally, the inner wall of the fixing sleeve is provided with a blocking step, and the proximal end surface of the protective tube abuts the blocking step.

Optionally, the outer wall of the fixing sleeve is provided with a positioning disc, and the distal end surface of the cylinder barrel abuts the positioning disc.

Optionally, the side wall of the cylinder barrel is provided with positioning holes, and the buckle includes an elastic arm extending from the positioning plate into the cylinder barrel, and a clip at the end of the elastic arm and matching with the positioning hole. hook.

Optionally, one side of the hook in the circumferential direction is provided with a chamfer structure for guiding the hook to rotate out of the positioning hole in the circumferential direction.

Optionally, the side wall of the fixing sleeve has a thickened area, and the vent hole is opened in the thickened area.

Optionally, along the axial direction of the fixing sleeve, the exhaust hole is located between the blocking step and the positioning plate.

Optionally, the cylinder tube includes a plurality of butt-connected in sequence along the axial direction, and two adjacent cylinder tubes are connected by an isolation seal, and one of the plurality of pipes slidably seals through the The isolation seal is detachably connected with two adjacent cylinder barrels through a snapping method.

Optionally, the cylinder includes a first cylinder and a second cylinder that are successively butted along the axial direction, wherein a first piston is slidably mounted in the first cylinder, and a second cylinder is slidably mounted in the second cylinder. Piston, the pipe includes a first pipe, an intermediate pipe and a second pipe arranged coaxially from the inside to the outside;

All the pipes enter from the distal end of the first cylinder, where the first pipe is fixed to the first piston, and the intermediate pipe extends out of the first piston and enters the second cylinder via the isolation seal. It is fixed to the second piston, and the first tube is fixed to the proximal end of the second cylinder after extending out of the second piston.

Optionally, the isolation seal includes:

A cylinder, the cylinder has an axial direction, and the two axial ends of the cylinder are respectively inserted into the cylinders on the corresponding side;

Two sealing plugs, the two sealing plugs are respectively fixed to the axial end of the cylinder body and are respectively fitted with the inner wall of the cylinder on the corresponding side in a sealing manner, and each sealing plug is respectively provided with an escape hole for the pipe to pass through;

Two sets of buckles, the two sets of buckles are respectively fixed to the axial end of the cylinder and are respectively engaged with the cylinder on the corresponding side.

Optionally, the two axial ends of the cylinder are respectively provided with outer flanges, and each sealing plug is fixedly sleeved on the corresponding outer flanges.

Optionally, the outer periphery of the sealing plug is provided with at least two convex rings spaced apart in the axial direction, and each convex ring is in a sealing fit with the inner wall of the corresponding cylinder.

Optionally, a positioning disk is provided on the outer circumference of the cylinder, and the end surfaces of two adjacent cylinders respectively abut against two opposite sides of the positioning disk.

Optionally, reinforcing ribs are respectively provided between the outer circumference of the cylinder and the two opposite sides of the positioning plate.

Optionally, in the radial direction of the cylinder, the outer edge of the reinforcing rib is against the inner wall of the cylinder where it is located.

Optionally, the cylinder wall of each cylinder is provided with positioning holes, the two sets of buckles are fixed on two opposite sides of the positioning plate, and each buckle includes an elastic arm extending from the positioning plate into the cylinder. And a hook at the end of the elastic arm and matched with the positioning hole.

Optionally, the reinforcing ribs and the buckles are evenly and alternately arranged along the circumferential direction of the cylinder.

Optionally, the end of the hook is provided with a guide inclined surface that guides itself into the positioning hole along the axial direction of the cylinder.

Optionally, the hook has a chamfered structure on one side in the circumferential direction to guide itself to unscrew the positioning hole along the circumferential direction of the cylinder.

Optionally, each cylinder barrel is provided with a spare interface communicating with the inside of the cylinder barrel. The standby interface has a standby state of closing the cylinder barrel to maintain the internal pressure of the cylinder barrel and an active state of opening the cylinder barrel to connect the external driving equipment.

Optionally, the control handle is provided with a hydraulic drive circuit for driving the relative movement of each pipe through the piston, and a communication port for connecting the hydraulic drive circuit is provided on the cylinder.

Optionally, each cylinder is provided with at least one backup interface, and a controllable valve is independently or linked to the backup interface and the communication port.

Optionally, the standby interface and the communication port are both arranged on the outer circumferential surface of the cylinder, and the positions of the standby interface and the communication port correspond to each other.

Optionally, the control handle is provided with a shielding cover for shielding at least a part of the cylinder, and the shielding cover is integrally or separately provided with the control handle.

Optionally, the shielding cover is enclosed with the control handle by a buckle, and the shielding cover is arranged in the extension direction of the pipe and is provided with a first assembly part that cooperates with the control handle in this direction; the first assembly part is used for To limit the movement of the shielding cover in the radial direction of the pipe.

Optionally, the cross-sectional shape of the shielding cover itself is U-shaped, and the U-shaped interior is used for accommodating the cylinder, the first assembly part is opened at the U-shaped opening; the U-shaped opening of the shielding cover is provided with Two first assembling parts; the two first assembling parts have assembly positions close to each other and disassembly positions far away from each other during the change of the U-shaped opening amplitude of the shielding cover.

Optionally, the shielding cover is provided with second fittings at both ends in the extension direction of the pipe, and the second fittings cooperate with the control handle to restrict the movement of the shielding cover in the extension direction of the pipe.

Optionally, the control handle is provided with a first assembly groove that cooperates with the first assembly part; the control handle is provided with a second assembly groove that cooperates with the second assembly part, and the first assembly groove The assembling groove and the second assembling groove are not coplanar and spatially, and the first assembling groove and the second assembling groove communicate with each other or not.

Optionally, the shielding cover is set as follows:

The length of the shielding cover is less than the length of the cylinder tube and exposes a part of the cylinder tube;

The length of the shielding cover is greater than or equal to the length of the cylinder tube, and the shielding cover exposes a part of the cylinder tube in a partially hollowed form.

Optionally, the liquid storage tank includes:

Tank body, with tank mouth and inlet and outlet connected to the hydraulic drive circuit;

Buffer capsule, the buffer capsule is placed in the tank body and sealed with the mouth of the tank;

The gland is buckled with the tank body and clamps and fixes the buffer bag with the tank mouth.

Optionally, the tank body has a bottom wall on the side away from the tank opening, the bottom wall is provided with a liquid injection port, and a pipe joint is installed at the liquid injection port.

Optionally, the tank is installed inside the control handle, and only the pipe joint is exposed to the control handle.

Optionally, both the inlet and the outlet of the tank are adjacent to the bottom wall.

Optionally, the buffer bladder is made of an elastic material, and the internal volume of the tank body is changed by its own deformation.

Optionally, the buffer bladder has an open structure on the side facing the can mouth, and the opening part has an outer flange, which is clamped and fixed by the gland and the can mouth.

Optionally, the outer flange has an annular protrusion that abuts the pressing cover.

Optionally, the bladder wall of the buffer bladder has a corrugated structure that can be stretched and deformed.

Optionally, the gland includes:

A ring frame that clamps and fixes the buffer bag with the can mouth;

An elastic hook extending from the ring frame to one side of the tank body and matched with the tank body.

Optionally, the tank mouth is turned over to form an interface platform, the annular frame and the top surface of the interface platform clamp and fix the buffer bag, and the elastic hook abuts against the bottom surface of the interface platform.

Optionally, the top surface of the interface platform is looped with a flange that abuts against the buffer bag.

Optionally, the tank includes a first tank and a second tank communicating with each other, and the buffer capsule is provided in the first tank.

Optionally, the volume of the first tank is greater than the volume of the second tank.

Optionally, the top of the first tank body is provided with the tank mouth, and the shape of the bottom of the first tank body converges and transitions to the second tank body.

Optionally, the control handle is provided with a hydraulic drive circuit for driving the relative movement of the pipes, and the hydraulic drive circuit has at least one drive pump for driving the flow of liquid and a control valve for controlling the direction of the liquid flow; the control The handle is provided with a holding part, the operating part of the driving pump is arranged at the holding part, and the operating part of the control valve is adjacent to the holding part.

Optionally, the control valve adopts a multi-port switching valve, and the multi-port switching valve includes:

Two valve seats arranged oppositely, one of the valve seats is provided with a drive side interface for accessing the hydraulic drive circuit, and the other valve seat is provided with a working side interface for the hydraulic drive circuit;

A valve core that is sealed and buckled by two valve seats and is installed in rotation, the valve core has a communication hole, the valve core rotates to different angles, the communication hole connects the corresponding drive side interface and the working side interface;

A wrench linked with the valve core is used to change the rotation angle of the valve core, and the wrench serves as an operating component of the control valve.

Optionally, the wrench and the grip part are located on the same side in the radial direction of the working part.

Optionally, the wrench is located on the proximal side of the grip portion, and the driving member faces the wrench.

Optionally, an anti-dropping block is provided at one end of the grip part away from the working part.

Optionally, the anti-dropping blocking member surrounds the wrench.

Optionally, the control handle includes a working part and a holding part connected to the working part, and a cylinder with a piston inside is arranged in the working part, and the plurality of pipes are inserted into the cylinder and connected to The piston is fixed relative to the cylinder, and the pipes are hydraulically driven to move relative to each other in the cylinder;

The cylinder barrel is respectively connected with corresponding working side ports on both sides of the piston, and the hydraulic drive circuit further includes a driving pump connected with each driving side port to drive the flow of liquid.

Optionally, the drive pump includes:

A pump housing fixed in the control handle and connected to the hydraulic drive circuit;

A work piece movably installed in the pump housing for driving liquid flow;

A driving part movably installed on the grip part and linked with the work part, and the driving part is used as an operating part of the driving pump;

A return spring acting between the control handle and the drive member.

Optionally, the cylinder includes a first cylinder and a second cylinder that are successively butted along the axial direction, wherein a first piston is slidably mounted in the first cylinder and slid in the second cylinder. A second piston is installed, and the multiple pipes include a first pipe, an intermediate pipe, and a second pipe that are coaxially arranged from the inside to the outside;

All pipes enter from the distal end of the first cylinder, wherein the first pipe is fixed to the first piston, and the intermediate pipe extends out of the first piston and enters the second cylinder via an isolation seal. It is fixed to the second piston, and the first tube is fixed to the proximal end of the second cylinder after extending out of the second piston.

Optionally, each valve seat is provided with an installation groove on the side facing the valve core, and a sealing gasket is fixedly embedded in the installation groove, and the sealing gasket is against and sealed against the valve core through the sealing gasket.

Optionally, positioning teeth engaged with each other are provided between the inner periphery of the mounting groove and the outer periphery of the sealing gasket.

Optionally, of the two valve seats, one of the valve seats is a first valve seat provided with the drive side interface, and the other valve seat is a second valve seat provided with the working side interface;

The first valve seat is provided on the side facing the valve core with a liquid inlet that communicates with the drive-side interface, and the first sealing gasket is provided with a first sealing gasket that corresponds to the position of the liquid inlet and communicates with each other. One through the liquid hole;

The second valve seat is provided with a liquid outlet hole communicating with the working side interface on the side facing the valve core, and the second sealing gasket is provided with a second sealing gasket corresponding to the position of the liquid outlet hole and communicating with each other. Two liquid holes;

When the valve core rotates to different angles, the communication hole on the valve core connects the corresponding first liquid passage hole and the second liquid passage hole.

Optionally, there are two liquid inlet holes, and each liquid inlet hole is at a different radial position relative to the rotation axis of the valve core; the position of the first liquid passage hole matches the corresponding liquid inlet hole position ；

The valve core is provided with two annular grooves, an inner and an outer groove, on the side facing the first valve seat, each annular groove is connected to one of the liquid inlet holes, and the communication holes are two and respectively communicate with one of the annular grooves .

Optionally, the wrench includes an annular sleeve located on the outer periphery of the valve core, and a hook portion fixed to the annular sleeve and extending to the outside of the control handle; the inner edge of the annular sleeve and the valve core The outer peripheries are linked by a one-way clutch mechanism that cooperates with each other.

Optionally, the one-way clutch mechanism includes:

Ratchet teeth arranged around the outer periphery of the valve core;

An elastic claw fixed on the inner circumference of the annular sleeve;

The wrench has relatively positive and negative directions relative to the rotation direction of the valve core. When rotating in the forward direction, the elastic pawl engages with the ratchet to drive the valve core. When rotating in the reverse direction, the elastic pawl engages with the ratchet to drive the valve core. The jaw deforms and slips away from the ratchet, and the wrench resetting member drives the wrench to rotate in a reverse direction.

Optionally, the elastic claw extends along the circumferential direction of the annular sleeve and is bent inwardly.

Optionally, 2 to 4 elastic jaws are evenly distributed along the circumferential direction of the annular sleeve.

Optionally, the multi-way switching valve includes a wrench reset member acting between the wrench and at least one valve seat.

Optionally, the wrench includes an annular sleeve located on the outer periphery of the valve core, and a hook portion fixed to the annular sleeve and extending to the outside of the control handle; the inner edge of the annular sleeve and the valve core The outer peripheries are linked by a one-way clutch mechanism that cooperates with each other;

The wrench resetting member is a coil spring extending around the axis of the valve core, one end of the coil spring is connected with the valve seat, and the other end is connected with the annular sleeve.

Optionally, the coil springs are two side-by-side coils, each coil spring is located on both sides of the annular sleeve in the axial direction of the valve core, and one end of each coil spring has a valve seat inserted into the corresponding side valve seat. Positioning and bending, the other ends of the coil springs are connected to each other to form a positioning crossbar, and the outer periphery of the annular sleeve is provided with a slot for accommodating the positioning crossbar.

Optionally, each valve seat is provided with an insertion hole for the positioning and bending insertion.

Optionally, the one-way clutch mechanism includes:

Ratchet teeth arranged around the outer periphery of the valve core;

An elastic claw fixed on the inner circumference of the annular sleeve;

The wrench has relatively positive and negative directions relative to the rotation direction of the valve core. When rotating in the forward direction, the elastic pawl engages with the ratchet to drive the valve core. When rotating in the reverse direction, the elastic pawl engages with the ratchet to drive the valve core. The jaw deforms and slips away from the ratchet, and the wrench resetting member drives the wrench to rotate in reverse;

In the axial direction of the valve core, the outer circumference of the valve core includes three sections, the ratchet teeth are fixedly distributed in the middle section, and the two sides are smooth sections. The two coil springs are respectively sleeved on the corresponding side of the smooth section. On paragraph.

The distal end of the interventional device delivery system of the present application adopts a wire control method to control the release of the interventional device, and the proximal end can adopt a hydraulic drive method, which is convenient and quick to use.

Description of the drawings

Fig. 1 is a schematic structural diagram of an embodiment of an interventional device delivery system according to the present application;

Figure 2a is a schematic diagram of the structure of the distal part of the interventional device delivery system of this application;

Figure 2b is a schematic structural diagram of an interventional device used in an embodiment of the application;

Figure 2c is a schematic structural diagram of an interventional device used in another embodiment of the application;

Figure 2d is a schematic structural diagram of the loading state of the interventional device;

Figure 2e is a schematic structural diagram of the interventional device in a half-released state;

Figure 2f is a schematic structural diagram of the released state of the interventional device;

Figure 3a is a schematic diagram of the internal structure of an embodiment of the interventional device delivery system of the present application;

Figure 3b is a schematic structural view of the interventional device delivery system in Figure 3a with the movable cover and half of the shell removed;

Figure 3c is a cross-sectional view of the interventional device delivery system in Figure 3a;

Figure 3d is a schematic diagram of the structure of the cylinder part of the interventional device delivery system;

Fig. 3e is a schematic structural diagram of the cylinder barrel and other components in Fig. 3d after being decomposed;

Figure 3f is an enlarged view of the distal part of the control handle;

Figure 3g is a schematic diagram of a spare interface set on the cylinder;

Fig. 3h is a schematic view of the cylinder in Fig. 3g from another perspective alone;

Figure 4 is an enlarged view of part C in Figure 3c;

Figure 5 is an enlarged view of part B in Figure 3c;

Fig. 6a is an exploded view of the fixing sleeve and the distal sealing plug in an embodiment of the interventional device delivery system of the present application;

Fig. 6b is a schematic view of the structure of the fixed sleeve and the distal sealing plug in Fig. 6a after being assembled;

Fig. 6c is a schematic structural view of the fixing sleeve in Fig. 6a from another angle;

Figure 6d is a schematic view of the structure of the fitting part of the fixed sleeve and the cylinder;

Figure 7a is an exploded view of the isolation seal in an embodiment of the interventional device delivery system of the present application;

Fig. 7b is a schematic diagram of the assembled structure of the isolation seal in Fig. 7a;

Fig. 7c is a schematic structural view of the isolation seal in Fig. 7b from another angle;

Figure 7d is an enlarged view of part D in Figure 3c;

Figure 7e is a schematic structural view of the mating part of the isolation seal and the two cylinder barrels in Figure 7a;

Figure 8a is a schematic view of the structure of the proximal part of the cylinder;

Figure 8b is a schematic structural view of the pipeline joint and the proximal sealing plug after being assembled;

Fig. 8c is another structural schematic diagram of the pipeline joint and the proximal sealing plug in Fig. 8b after being assembled;

Figure 8d is an exploded view of the pipeline joint and the proximal sealing plug in Figure 8b;

Figure 9a is a schematic structural diagram of a liquid storage tank in an embodiment of an interventional device delivery system according to the present application;

Figure 9b is an enlarged view of part E in Figure 3c;

Figure 9c is an exploded view of the liquid storage tank in Figure 9a;

10 is an exploded view of the driving pump in an embodiment of the interventional device delivery system according to the present application;

Figure 11a is a schematic structural diagram of a multi-port switching valve in an embodiment of an interventional device delivery system according to the present application;

Fig. 11b is a schematic diagram of the spool structure of the multi-way switching valve in Fig. 11a;

Fig. 12a is a schematic structural diagram of a multi-port switching valve in another embodiment of the interventional device delivery system of the present application;

Fig. 12b is a schematic structural view of the multi-way switching valve in Fig. 12a from another angle;

Figure 12c is an exploded view of the multi-way switching valve in Figure 12a (the valve seat remains buckled);

Figure 12d is an exploded view of the multi-way switching valve in Figure 12a from another angle;

Figure 12e is an exploded view of the multi-way switching valve in Figure 12a from another angle;

Fig. 13a is a schematic diagram of the hydraulic working principle in an embodiment of the interventional device delivery system of the present application;

Figure 13b is an enlarged view of the part D1 of the gear position in Figure 13a;

FIG. 14a is a schematic diagram of the structure of the distal part in an embodiment of the interventional device delivery system of the present application;

Figure 14b is an exploded view of the lock and related components in Figure 14a;

Figure 14c is an exploded view of the lock and related components in Figure 14a from another angle;

Figure 14d is an enlarged view of part A in Figure 3c;

Figures 15a to 15c are schematic diagrams showing changes of the lock in different states;

Figures 16a to 16d are schematic diagrams showing changes of the lock and the interventional instrument in different states;

Figure 17 is a schematic diagram of the connection mode of the binding wire on the stent of the interventional instrument;

Fig. 18a is a schematic diagram of an application scenario of the interventional device in Fig. 17;

Fig. 18b is a schematic diagram of the structure of the interventional device in Fig. 17 after being covered with a film;

Fig. 18c is a sectional schematic view of the stent of the interventional device in Fig. 17;

Figures 19a to 19e are schematic diagrams of cooperation between the binding wire and the loop wire sleeve on the stent in different embodiments.

The reference signs in the figure are explained as follows:

1. Pipe fitting; 11. First pipe fitting; 11a, distal section; 11b, proximal section; 111, guide head; 112, mounting head; 1121, converging guide hole; 1122, guide flaring; 113, pipe joint 1131, positioning plate; 1132, hook; 12, second pipe fitting; 121, loading section; 13, middle pipe fitting; 14, protection tube; 15, base; 151, proximal plate; 1511, avoidance hole; 1512, Accommodating groove; 152, distal plate; 1521, cable groove; 1522, key hole; 1523, guide hole; 153, transition section; 16, movable seat; 161, ring part; 162, lock piece; 163, unlock lever 1631, trigger end; 17, support sleeve; 171, first guide surface; 172, second guide surface; 18, lashing line; 181, fixed wire loop; 182, movable wire loop; 19, circular wire sleeve; 191, Span

2. Control handle; 21. Working part; 211. Distal end; 212. Proximal end; 22. Grip part; 23. Positioning component; 24. First half shell; 25. Second half shell; 26. Positioning post; 27. Shielding cover; 271. The first assembly part; 272. The second assembly part; 273. The first assembly slot; 274. The second assembly slot; 28. The anti-falling block;

3. Cylinder; 31, first cylinder; 311, first hydraulic chamber; 312, first chamber; 313, second chamber; 314, communication port; 315, communication port; 32, second cylinder; 321. The second hydraulic chamber; 322. The third chamber; 323. The fourth chamber; 324. Connecting port; 325. Connecting port; 326. Spare interface; 327. Spare interface; 328. Spare interface; 329. Spare interface. 33. Hydraulic pipeline; 331. The first one-way valve; 332. The second one-way valve; 34. Isolation seal; 341. Cylinder body; 342. Positioning plate; 343. Eversion; 344. Reinforcing ribs; 345. Clip; 3451, elastic arm; 3452, hook; 3453, guide slope; 3454, chamfer structure; 346, sealing plug; 3461, convex ring; 35, distal sealing plug; 351, convex ring; 36, Proximal sealing plug; 361, convex ring;

4. The first piston; 41, the support frame; 42, the sealing sleeve; 43, the through hole;

5. Drive pump; 51, pump housing; 52, work piece; 53, drive piece; 531, shaft hole; 54, inlet; 55, outlet; 56, return spring; 57, pump chamber;

6. Multi-port switching valve; 61, valve seat; 61a, first valve seat; 61b, second valve seat; 611, first sealing gasket; 6111, first positioning tooth; 6112, first fluid hole; 613 , Liquid inlet hole; 614, second positioning tooth; 615, third positioning tooth; 616, liquid outlet hole; 617, second sealing gasket; 6171, fourth positioning tooth; 6172, second fluid hole; 618, Cap; 619, jack; 62, valve core; 621, shaft; 622, ratchet; 623, ring groove; 624, communicating hole; 625, smooth section; 63, wrench; 631, ring sleeve; 632, elastic jaw 633. Hook part; 634. Card slot; 64. Identification; 65. Interface; 66. Runner; 67. Drive side interface; 68. Work side interface; 69. Wrench reset piece; 691. Positioning bar; 692 , Positioning and bending;

7. Liquid storage tank; 71, liquid injection port; 72, spare connector; 73, inlet; 74, outlet; 75, tank body; 75a, first tank body; 75b, second tank body; 751, interface platform; 752 , Flange; 76, Gland; 761, Elastic hook; 77, Buffer bag; 771, Outer flange; 772, Annular protrusion;

8. Fixed sleeve; 81. Through hole; 82. Vent hole; 83. Positioning groove; 84. Eversion; 85. Blocking step; 86. Positioning plate; 861. Reinforcing rib; 87. Clip; 871. Elasticity Arm; 872, hook; 873, chamfer structure; 88, thickened area;

9. The second piston;

10. Bracket; 101, connecting ear; 102, valve leaflet; 103, expanding mask; 104, outflow section; 105, waist; 106, inflow section;

1000, right atrium; 1100, right ventricle; 1200, lower body vena cava; 1300, upper body vena cava;

M1, connection point; M2, connection point.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

It should be noted that when a component is said to be "connected" with another component, it can be directly connected to the other component or there may also be a central component. When a component is considered to be "installed on" another component, it can be directly installed on another component or a centered component may exist at the same time.

It should be noted that the terms "proximal" and "distal" are relative to the operator. For example, in the catheters or sheaths referred to in the text, the "proximal end" refers to the end close to the operator, that is, the end that enters the body away from the lesion during use (for example, the end of the catheter connected to the control handle), and the "distal" refers to the end far away from the operator , That is, when in use, it enters the end of the body close to the lesion (for example, at the position of the end of the catheter). Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. The terminology used in the specification of the application herein is only for the purpose of describing specific embodiments, and is not intended to limit the application. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

The delivery system can be used to treat heart valves (for example, mitral valve, aortic valve, tricuspid valve, vena cava valve, pulmonary valve). For example, by loading a valve or stent at the distal end of the delivery system to treat aortic stenosis, secondary and tricuspid valve regurgitation, or by loading a vena cava valve and implanting a vena cava valve at the superior and inferior vena cava to solve the tricuspid valve Right heart problems such as regurgitation; this treatment can include, but is not limited to, valve replacement, valve repair, or other operations that affect valve function. The system and method can use a transcatheter method, such as a catheter system delivered by a venous or femoral artery route; or other minimally invasive surgical methods, including but not limited to a transapical method to deliver a catheter.

Referring to Figure 1, the interventional instrument delivery system of one of the embodiments of the present application includes a catheter system. The catheter system includes a plurality of tubes 1 coaxially arranged from the inside out, and a control handle 2 that drives the relative movement of the plurality of tubes 1 , The distal end of each tube is used to cooperate with each other to operate interventional instruments, the proximal end of each tube is connected to the control handle 2, and the control handle 2 uses a hydraulic way to drive the relative movement of each tube.

In this application, the hydraulic drive of each tube at the control handle can realize the operation of interventional instruments, such as releasing, cutting, rotating, grabbing or recovering, etc. The entire hydraulic system is configured at the proximal end, which is more convenient for on-site debugging or assembly, even if there is Unexpected conditions are also easy to solve outside the body, and if the hydraulic mechanism is arranged at the remote end, more stringent requirements are placed on the volume and safety of the equipment, and the form and direction of movement that can be controlled are also limited due to equipment problems.

Multiple pipes are understood to mean at least two pipes. Specifically, it can be a sliding fit between any two pipes, that is, all parts between the two pipes have relative displacement in the axial direction during movement. Of course, if the two pipes If a deformable connecting piece is additionally provided, the relative movement relationship of the connecting piece will be considered separately.

It can also be that two of the pipes, such as the two adjacent in the radial direction, are partially fixedly connected (for example, fixed to each other at the distal part). Since the two are only fixed to each other at the distal part, then the proximal part is fixed to each other. The part can also tolerate a small amount of relative displacement between the two. Of course, this relative movement will cause one of them to deform and bend after being transmitted to the distal end. This feature can be used to realize the bending of the distal end of a tube.

The number of pipes 1 can be two, three or more. The relative movement of different pipes 1 can be achieved at the distal end (far away from the operator, that is, the end that enters the body and is close to the lesion during use, and the corresponding proximal end is opposite). Corresponding operations, such as delivery, release, posture adjustment, recovery, etc., can be implemented in accordance with conventional technology in terms of the realization of each tube 1 itself and the remote function. Of course, improvements to the distal structure of the tube are also provided below. One of the key points of this application is to use a liquid drive method at the operating handle to drive the relative movement of different pipes.

Referring to Fig. 2a, in one of the embodiments, the multiple pipes include a first pipe 11, an intermediate pipe 13, and a second pipe 12 that are slidably nested from the inside to the outside, wherein:

The distal end of the first tube 11 is used to place an interventional instrument; the first tube 11 and the interventional instrument can be separated from each other in the body, that is, the interventional instrument stays in the body, or can be connected to each other, and the interventional instrument does not remain after the operation is completed. In the body, it is withdrawn to the body with the first tube 11.

The most distal end of the first tube 11 is a guide head 111, and a mounting head 112 is also fixed adjacent to the proximal end of the guide head 111. When the interventional instrument is loaded, it is located between the guide head 111 and the mounting head 112 and is radially compressed. Generally have connecting ears,

The connecting ear is the part where the interventional device is connected to the delivery system. Compared with the stent, the connecting ear can be a mesh on the end of the stent, or a connecting part with holes extending outward relative to the stent body, such as the connection shown in Figure 2b. Ear 101; In the prior art, the outer wall of the mounting head is usually provided with grooves or protrusions for mating with the connecting ears of the interventional instrument, and the connecting ears are engaged with the grooves of the mounting head 112 or hung on the protrusions during loading. The upper closure is to limit the axial position of the interventional instrument. For more fixing methods of the connecting ear and the mounting head, please refer to the WO2019080857A1 patent.

The distal end of the second tube 12 has a loading section for wrapping or releasing interventional instruments. In other embodiments, a protective tube 14 fixedly connected to the control handle may be sheathed outside the proximal end of the second tube 12.

The distal end of the middle tube 13 is provided with a lock that restricts the interventional instrument to the first tube 11; the axial sliding of the middle tube 13 relative to the first tube 11 can change the fit between the lock and the mounting head on the first tube 11 relationship;

In other embodiments, the distal end of the intermediate tube 13 may be fixedly connected to the first tube 11 for traction and bending, and to change the posture of the interventional instrument to facilitate accurate positioning.

The connecting part of the distal end of the intermediate tube 13 and the first tube 11 can be adjacent to the mounting head on the first tube 11, for example, on the proximal side of the mounting head. Of course, the distal end of the intermediate tube 13 can also be directly fixed to the mounting head. .

2b, 2c, the interventional device involved in the present application is not strictly limited in its specific shape, for example, it may include a stent 10 with a connecting ear 101 at one axial end of the stent 10, and the connecting ear 101 may have an expansion head at the end , It is also possible to have a ring or C-shaped connection part.

The stent 10 is made of nickel-titanium alloy or stainless steel, and has a radially compressible or expandable structure, and is generally a net-tube structure formed by laser cutting or weaving. The inside of the stent can be sutured with or without biomembrane.

With reference to Figures 2d to 2f, the distal end of the second tube 12 is a loading section 121. In the loaded state, the interventional device is radially compressed. The loading section 121 is wrapped around the periphery of the interventional device to limit the radial expansion of the interventional device. After the interventional device is in place The second tube 12 is driven by the control handle to axially slide and retract relative to the first tube 11, so that the interventional instrument is gradually exposed to the human vasculature to allow the interventional instrument to expand radially, and the interventional instrument starts to enter half-release from the expansion of the distal end In the state, as the second tube 12 is further withdrawn, the interventional device is completely exposed, and finally, the connecting ear of the interventional device is separated from the mounting head and enters the released state to complete the release of the interventional device. During the whole process, the relative sliding of the first pipe 11 and the second pipe 12 in the axial direction is driven by the control handle 2.

The first pipe 11 and the second pipe 12 are commonly used plastic pipes or metal pipes in the field of interventional devices, such as cut hypotubes or metal braided pipes, metal braided and hypotube mixed pipes, or polymer and metal pipe mixed pipes. The first pipe 11 and/or the second pipe 12 may also be a multilayer composite pipe.

Referring to Figures 3a to 3e, the shape of the control handle 2 is not strictly limited. In order to facilitate the packaging of other components, a split structure can be adopted, that is, the housing of the control handle 2 includes a first half shell 24 and a second half that are interlocked with each other. The shell 25, of course, can be divided into more parts in order to facilitate local maintenance or operation.

In order to facilitate the mutual fixing of the first half-shell 24 and the second half-shell 25, multiple methods of snaps and fasteners can be used. In this embodiment, at least one of the first half-shell 24 and the second half-shell 25 One is provided with a positioning column 26, and the positioning column 26 is provided with a screw hole, and the other is provided with a corresponding installation hole for bolts, and the two are fixed by bolts;

Or both are provided with positioning posts 26 and their positions are matched, one of the positioning posts is provided with positioning holes, and the other of the positioning posts directly snaps into the corresponding positioning holes.

In other embodiments, the first half-shell 24 and the second half-shell 25 may also be fixed by snapping, bonding or welding.

In different embodiments, the hydraulic cavity is directly opened inside the control handle 2, or the control handle 2 is fixedly installed with a cylinder 3, and the inside of the cylinder 3 is a hydraulic cavity.

The cross section of the cylinder 3 is not strictly limited. Preferably, the outer circumference is surrounded by a smooth curve, such as a circle or an ellipse. Taking the cross section as an example, it can be seen that the whole is cylindrical in the figure.

In order to protect the cylinder tube 3, the first half shell 24 and the second half shell 25 buckle and surround the cylinder tube 3. In a preferred embodiment, the control handle 2 is provided with a positioning component 23 that cooperates with the cylinder tube 3. The positioning component 23 is one or more positioning steps, and the shape of the positioning step corresponds to the outer contour of the cylinder 3 to clamp and fix the cylinder 3. Although the shape of the control handle 2 is not strictly limited, for ease of operation, in a preferred embodiment, the control handle 2 includes a working part 21 and a holding part 22 connected to the working part 21. The cylinder 3 is located in the working part 21, that is, the working part 21 is used to provide a hydraulic chamber as a whole, and the working part 21 has a distal end 211 and a proximal end 212 opposite to each other.

The shape of the gripping portion 22 is convenient for gripping operations. For example, it has a length direction as a whole. Since a cylinder is installed in the working portion 21, the movement direction of the piston in the cylinder is the axial direction of the cylinder. In this embodiment, the gripping portion 22 The length direction of the cylinder is roughly perpendicular to the axial direction of the cylinder, or slightly oblique. The working part 21 and the grip part 22 are L-shaped as a whole. In order to further improve the feeling of holding a hand and conform to the shape of the hand, the overall shape of the control handle 2 in this embodiment is similar to the shape of a pistol. Hydraulically driven control components, such as switches, etc., can be provided on the grip portion 22 to facilitate one-handed operation.

In other embodiments, the length direction of the holding portion 22 may also be substantially parallel to the axial direction of the cylinder, or even aligned with each other. Then the overall shape of the control handle 2 is a strip.

The working part 21 and the holding part 22 adopt an integrated structure, or can be detachably connected, to facilitate storage with a small volume. The connecting part of the working part 21 and the holding part 22 can be fast assembled by means of snaps or threads.

In a preferred embodiment, the holding part 22 is connected to the proximal end 212 of the working part 21. Each tube passes through the control handle 2 from the distal end 211 of the working part 21 and further extends to the distal end.

In order to drive the relative movement of the pipe fittings hydraulically, in an embodiment of the present application, the connection method of the pipe fittings and the piston is further improved, and the pipe fittings are directly inserted into the cylinder, so that the structure is further compact and the integration degree is improved.

Of course, as a hydraulic drive mode, each pipe must be sealed at the position where it enters and exits the cylinder 3, and according to the movement relationship of the pipe relative to the cylinder 3, a fixed seal or a sliding seal is adopted accordingly.

Each communication port is provided in the cylinder 3, and the hydraulic drive circuit is used to drive the piston in the cylinder 3 to reciprocate. The hydraulic drive circuit can be equipped with necessary control devices such as pumps and valves as required. In order to further improve the degree of integration, one embodiment The middle hydraulic drive circuit is arranged on the control handle 2 and is used to drive the piston to move the pipes relative to each other. The inside of the first tube 11 can be used to thread a guide wire, etc., so the proximal end of the first tube 11 is fixed to the control handle 2. In one embodiment, a pipeline joint 113 is installed at the proximal end of the working part 21, and the first tube 11 extends and connects to the pipe joint 113. The pipe joint 113 may specifically be a Luer joint and is connected to the first pipe 11, and physiological saline can also be passed into the first pipe 11 through the pipe joint 113 as needed to perform the exhaust operation. The proximal end of the first pipe piece 11 can be directly fixed to the pipe joint 113, or connected to the pipe joint 113 through a fastening sleeve, which can be filled between the outer wall of the first pipe piece 11 and the inner wall of the pipe joint 113 , To achieve tightening and sealing.

There are multiple setting modes for the matching relationship between the control handle 2 and the cylinder 3. For example, the control handle 2 constitutes a closed space to surround the cylinder 3; for another example, the control handle 2 exposes a part of the cylinder 3; for another example, the control handle 2 is only used to provide the positioning of the cylinder 3 and is in the circumferential direction of the cylinder 3. Expose the setting of cylinder 3; etc.

In the embodiment disclosed with reference to FIG. 3a, the control handle 2 is provided with a shielding cover 27 for shielding at least a part of the cylinder tube 3, and the shielding cover 27 is integrated with the control handle 2 or is provided separately. In the embodiment shown in the drawings, the shielding cover 27 is an independent component. When the shielding cover 27 is installed on the control handle 2, the shielding cover 27 can be enclosed with the control handle 2 to close the external dimensions of the control handle 2, thereby To achieve the shielding of the cylinder 3.

There are many ways to install the shielding cover 27 and the control handle 2, for example, using buckles and fasteners. Referring to the embodiment disclosed in FIG. 3f, the shielding cover 27 is enclosed with the control handle 2 by a buckle. The shielding cover 27 is provided in the extension direction of the pipe 1 and a first assembly 271 that is matched with the control handle 2 is provided in this direction. The first fitting 271 is used to restrict the movement of the shielding cover 27 in the radial direction of the pipe 1. The shielding cover 27 itself has a U-shaped cross-sectional shape, and the U-shaped interior is used for accommodating the cylinder 3, and the first assembly 271 is opened at the U-shaped opening. The U-shaped opening of the shielding cover 27 is provided with two first assembling parts 271 opposite to each other. The two first assembling parts 271 have assembly positions close to each other and disassembly positions far away from each other during the change of the U-shaped opening amplitude of the shielding cover 27. The two first assembling parts 271 are kept in the assembly position under the action of the deformation elasticity of the material of the shielding cover 27 itself. The shielding cover 27 is provided with second fittings 272 at both ends in the extending direction of the pipe 1, and the second fittings 272 cooperate with the control handle 2 to restrict the movement of the shielding cover 27 in the extending direction of the pipe 1. The first assembly part 271 and the second assembly part 272 are ribs arranged on the inner surface of the shielding cover 27. The control handle 2 is provided with a first assembling groove 273 which is matched with the first assembling part 271. The control handle 2 is provided with a second assembling groove 274 that cooperates with the second assembling part 272. The first assembly groove 273 and the second assembly groove 274 are not coplanar. In a specific arrangement, the planes on which the first assembly groove 273 and the second assembly groove 274 are located are perpendicular to each other. Spatially, the first assembly groove 273 and the second assembly groove 274 communicate with each other or not.

In the extending direction of the tube 1, the length of the shielding cover 27 is greater than or equal to or less than the length of the cylinder 3. The different length relationships actually correspond to the covering ability of the shielding cover 27 to the cylinder. In addition to the change in size, the shielding cover 27 can also expose a part of the cylinder tube 3 in a partially hollowed form. For example, in other embodiments, the shielding cover 27 may also be provided in a semi-open structure. For example, the shielding cover 27 shields the cylinder tube 3 as a whole, but partially opens a hole for the cylinder tube 3 to be provided with a joint. The shielding cover 27 is also provided with a dust-proof cap (not shown) for the corresponding interface. The dust cap can be an integrated structure with the shielding cover or a separate component.

Referring to the embodiment shown in FIG. 3d, the first cylinder barrel 31 also has a communication port 314 and a communication port 315 for connecting the hydraulic drive circuit. The proximal end of the second cylinder barrel 32 is provided with a proximal end sealing plug 36, and the second cylinder barrel 32 also has a communication port 324 and a communication port 325 that are connected to the hydraulic drive circuit. Each communication port is used to realize the driving effect of the cylinder barrel for different pipelines, and the specific connection effect will be explained in detail below. As described in the background art, the control handle has many components, and the coordination relationship is complicated, and there is a risk of failure.

Referring to the embodiment shown in Figure 3g and Figure 3h, the interventional instrument delivery system includes a plurality of pipes arranged coaxially from the inside to the outside, and a control handle 2 that drives the relative movement of the multiple pipes. The distal end of each pipe is used To operate the interventional instruments in cooperation with each other, the proximal end of each tube is connected to the control handle 2, and the control handle 2 uses a hydraulic way to drive the relative movement of each tube;

One or more cylinders are provided in the control handle, and pistons are slidably installed in each cylinder 3. The two pipes adjacent to the radial position include an outer pipe and an inner pipe. The outer pipe enters the cylinder and connects with the cylinder. The piston in the cylinder is fixed, and the inner tube is extended to connect to the pistons of other cylinders or fixed to the control handle;

The cylinder barrel is provided with a spare interface communicating with the inside of the cylinder barrel. The spare interface has a standby state of closing the cylinder barrel to maintain the internal pressure of the cylinder barrel and an active state of opening the cylinder barrel to connect to external driving equipment.

Similar to the communication port 314, the communication port 315, the communication port 324, and the communication port 325, there can also be multiple spare ports. As shown in the drawings, the first cylinder 31 also has a spare port for connecting the hydraulic drive circuit. 326 and spare interface 327. The second cylinder 32 also has a backup interface 328 and a backup interface 329 for connecting the hydraulic drive circuit. The spare interface does not work when the cylinder and the hydraulic pipeline are working normally. You can refer to the description of the shielding cover above and store it in the operating handle. It can be used to connect external drive equipment in unexpected situations. The external drive equipment is used to provide power for the movement of the cylinder. The external driving device can be a common clinical fluid pumping device such as a plunger pump, a diaphragm pump, and an electromagnetic pump.

The setting of the number of spare ports can also be changed. For example, in the embodiment disclosed in the drawings, four spare ports are provided with corresponding communication ports to ensure that all functions of the hydraulic pipeline under normal conditions are realized and the stability is improved.

For example, in another embodiment, a total of 3 spare ports are provided on the cylinder, and the spare ports for pushing the second sheath to the distal end are omitted. The main reason for this setting is that the omitted spare interface is used to realize the actual function of retrieving the interventional device. In the actual treatment process, the retrieving of the interventional device itself is a rare situation, so in some products, there is no need to set this Spare interfaces to avoid excessive redundancy.

Regarding the setting of the backup interface, combined with the above description of the shielding cover, the backup interface is set toward the shielding cover. It is convenient for the cover to cover or open the spare interface. Set the interval between the backup interfaces. The interval distance can realize the effective driving of the cylinder. The positions of the spare interface and the communication port correspond to each other. This setting can ensure that the spare interface can realize all the functions of the cylinder under the normal condition of the communication port.

In order to facilitate the observation of the working condition of the hydraulic system, the shielding cover 27 can be made of transparent materials. Of course, in the housing of the control handle 2, the parts of the first half shell 24 and the second half shell 25 corresponding to the area to be observed can also be made of transparent materials. . For example, the part corresponding to the control valve or the liquid storage tank.

Correspondingly, controllable valves are independently or linked on the standby interface and the communication port. When there is a problem with the pipeline, it can prevent the fluid in the cylinder from unreliable pressure relief, and ensure the stable operation of the operating handle.

A first cylinder 31 and a second cylinder 32 are installed in the control handle 2. The two cylinders respectively provide a first hydraulic chamber 311 and a second hydraulic chamber 321. The first hydraulic chamber 311 is slidably installed with a first piston 4, A second piston 9 is slidably installed in the two hydraulic chambers 321. The first cylinder barrel 31 and the second cylinder barrel 32 are coaxially arranged to butt with each other, and an isolation seal 34 is provided at the butting position.

The proximal end of the second tube 12 penetrates into the first hydraulic chamber 311 and is fixedly connected to the first piston 4, and the proximal end of the intermediate tube 13 extends out of the first piston 4 and then slides and seals the penetrating isolation seal 34 into the second hydraulic chamber 321 , And the proximal end of the intermediate tube 13 is fixed with the second piston 9 in the second hydraulic chamber 321, and the proximal end of the first tube 11 extends out of the second piston 9 and then is fixedly connected with the control handle 2. The first piston 4 separates the first hydraulic chamber 311 into a first chamber 312 and a second chamber 313, and the second piston 9 separates the second hydraulic chamber 321 into a third chamber 322 and a fourth chamber 323, each chamber The chamber is connected to the hydraulic drive circuit through the corresponding communication port.

The first chamber 312 and the second chamber 313 are divided according to the first piston 4, and the third chamber 322 and the fourth chamber 323 are divided according to the second piston 9. Since the positions of the two pistons are movable, each chamber The volume of the chamber changes accordingly and is not fixed.

When only the first piston 4 moves to the distal end, the second tube 12 is driven to move to the distal end, while the positions of the first tube 11 and the intermediate tube 13 remain unchanged. The same is true when the first piston 4 moves to the proximal end.

When only the second piston 9 moves to the distal end, the intermediate tube 13 is driven to move to the distal end, while the positions of the first tube 11 and the second tube 12 remain unchanged. The same is true when the second piston 9 moves to the proximal end.

The first cylinder barrel 31 and the second cylinder barrel 32 are arranged coaxially and connected to each other through the isolation seal 34. The distal end of the first cylinder barrel 31 is provided with a distal sealing plug 35, and the first cylinder barrel 31 is also provided with The

communication ports

314 and 315 of the hydraulic drive circuit are connected on both sides of the first piston 4. The proximal end of the second cylinder barrel 32 is provided with a proximal end sealing plug 36, and the second cylinder barrel 32 also has a communication port 324 and a communication port 325 which are provided on both sides of the second piston 9 to connect to the hydraulic drive circuit.

The second tube 12 slidingly sealed through the distal end sealing plug 35 is connected to the first piston 4, the middle tube 13 and the first tube 11 extend the first piston 4 inside the second tube 12, and the middle tube 13 is further slid and sealed to penetrate and isolate The sealing member 34 is connected to the second piston 9, the first tube 11 extends from the second piston 9 inside the intermediate tube 13, and the sealed through-proximal sealing plug 36 is further fixed and connected to the pipeline joint 113 of the control handle 2.

Pistons are respectively arranged in each hydraulic chamber, and each piston can adopt the same structure on its own. The only difference is that the position and the pipes that pass through are different, but its structural characteristics and working principle are not affected.

4, in one embodiment, the two pipes adjacent to each other in the radial direction include the outer pipe, the second pipe 12, and the inner pipe, the middle pipe 13, the first piston 4 includes a support frame 41, and the support frame 41 is axially The two ends of the two have outwardly turned flanges, and each flange is fixed with a sealing sleeve 42 respectively. The two sealing sleeves 42 respectively serve as fixed sealing parts according to the matching relationship with the pipe fittings, which are sleeved on the second pipe fitting 12 and connected with each other. The outer wall of the second pipe piece 12 is fixed and sealed to fit;

The sliding seal part is sleeved on the intermediate pipe 13 and is slidingly and sealingly fitted with the outer wall of the intermediate pipe 13;

The support frame 41 and each sealing sleeve 42 each have an axial through hole 43 for the pipe to pass through, and the sealing sleeve 42 can be made of elastic materials such as rubber to facilitate sealing and fitting.

The fixed sealing part and the sliding sealing part are relatively fixedly connected by the support frame 41, and the outer circumference of both is slidingly and sealingly fitted with the inner wall of the first cylinder 31. The first piston 4 is fixedly connected to the second pipe 12 and is in sliding fit with the intermediate pipe 13. Therefore, the first piston 4 can drive the second pipe 12 when it moves, but the position of the intermediate pipe 13 is not affected. The same is true for the second piston 9. For example, in one embodiment, the two pipes adjacent to each other in the radial direction include the outer pipe, the middle pipe 13 and the inner pipe, the first pipe 11. The second piston 9 has an axis extending along the axis. Through hole, the proximal end of the middle tube 13 is fixedly connected in the through hole, that is, the second piston 9 is fixedly connected to the middle tube 13 and is in sliding fit with the first tube 11, so the second piston 9 can drive the middle tube 13 when it moves. But it does not affect the position of the first pipe 11. The proximal end of the first tube 11 passes through the second hydraulic chamber and is fixedly connected to the pipeline joint 113.

The radial gap between the two adjacent pipes in the radial direction is an exhaust gap, and each exhaust gap can be individually filled with physiological saline for exhaust, or it can be connected to a unified hydraulic drive circuit to implement exhaust. It can give full play to the auxiliary function of the hydraulic drive, and exhaust gas through liquid filling, and also saves additional exhaust equipment.

In order to establish a stable intervention channel, in one embodiment, a protective tube 14 is sleeved on the outside of the second tube 12, and the proximal end of the protective tube 14 is fixed to the control handle 2.

The protective tube 14 is fixedly installed relative to the control handle and located on the outer periphery of the second tube 12. Intervention is implemented through the channel established by the protective tube 14 to prevent the second tube 12 from scratching blood vessels when the second tube 12 reciprocates. The length of the protective tube 14 is its distal end. The position can be determined according to the length of the intervention path. The proximal end of the protective tube 14 is fixed on the distal side of the control handle 2, and the proximal end of the second tube 12 passes through the protective tube 14 and then enters the first cylinder.

In order to facilitate the installation of the proximal end of the protective tube 14, in one embodiment, a fixed sleeve 8 is installed on the control handle, the proximal end of the protective tube 14 and the distal end of the fixed sleeve 8 are in sealing butt, and the proximal end of the second tube 12 is protected by The tube 14 passes through the fixing sleeve 8 and further extends into the first hydraulic chamber.

Since the protective tube 14 and the second tube 12 need to slide relatively, a radial gap is sometimes reserved, and the radial gap needs to be vented during surgery.

With reference to Figures 5 to 6d and Figures 3a to 3e, an interventional instrument delivery system is provided in an embodiment, which includes a plurality of tubes arranged coaxially from the inside to the outside, and a control for driving the relative movement of the plurality of tubes Handle 2, the distal end of each tube is used to cooperate with each other to operate interventional instruments. The proximal end of each tube is connected to the control handle 2. The control handle 2 is equipped with a cylinder 3 with a piston inside, and the distal end of the cylinder 3 is sealed with A fixed sleeve 8, a plurality of pipes penetrate into the cylinder 3 through the fixed sleeve 8 and are connected to the piston or fixed with respect to the cylinder 3, and the piston is hydraulically driven in the cylinder 3 to make each pipe relatively move;

A protective tube 14 is sleeved on the outermost periphery of the multiple pipe fittings, and the proximal end of the protective pipe 14 is connected to the fixing sleeve 8. The radial gap between the outermost pipe fitting and the protective pipe 14 of the multiple pipe fittings is the exhaust gap , The side wall of the fixing sleeve 8 is provided with an exhaust hole 82 communicating with the exhaust gap.

The above-mentioned embodiments can be combined. For example, the cylinder 3 includes a first cylinder 31 and a second cylinder 32 that are successively butted from the distal end to the proximal end, and the first piston 4 is slidably mounted in the first cylinder 31. A second piston 9 is slidably installed in the second cylinder 32, and a plurality of pipes include a first pipe 11, an intermediate pipe 13 and a second pipe 12 which are coaxially arranged from the inside to the outside;

All the pipes enter from the distal end of the first cylinder 31, the first pipe 11 is fixed to the first piston 4, the intermediate pipe 13 extends out of the first piston 4, enters the second cylinder 32 and is fixed to the second piston 9. A tube 11 extends from the second piston 9 and is fixed to the proximal end of the second cylinder 32.

The fixing sleeve 8 has a through hole 81, and the proximal end of the protective tube 14 extends into the through hole 81 and is connected to the wall of the hole in a sealed and fixed manner by bonding, welding, interference fit, etc., the fixing sleeve 8 and the control handle 2 can be fixed by snapping or using fasteners. In one embodiment, an annular positioning groove 83 is provided on the outer periphery of the fixing sleeve 8, and the control handle 2 has two half-shells that are locked with each other, and the edges of the two half-shells It is engaged with the positioning groove 83. For example, it can be seen in the figure that the corresponding part of the first half shell 24 is locked into the positioning groove 83 to limit the axial position of the fixing sleeve 8.

Since the second tube 12 needs to slide back and forth, the proximal end of the fixing sleeve 8 is in a sliding and sealing fit with the outer wall of the second tube 12. The sliding and sealing fit here can be that the inner wall of the through hole 81 and the outer wall of the second tube 12 are in direct contact and fit. , It can also be indirectly matched through other components.

The protective tube 14 is fixedly inserted into one axial end of the fixing sleeve 8, and the other axial end of the fixing sleeve 8 is a connecting end. The connecting end is inserted into the distal end of the first cylinder 31 and is connected to the first cylinder 31 through a buckle 87 Fixed, the outer circumference of the connecting end is sleeved with a distal sealing plug 35 that matches with the inner wall of the first cylinder 31;

An escape hole is provided on the distal sealing plug 35, and the outermost pipe piece among the plurality of pipe fittings, that is, the second pipe piece 12, is in sliding and sealing fit with the escape hole.

In order to ensure the connection effect and facilitate assembly, in one embodiment, the connecting end is provided with an outer flange 84, and the distal end sealing plug 35 is sleeved on the outer flange 84. The distal sealing plug 35 is made of elastic materials such as rubber for ease of installation, and can also ensure the sealing effect. As a preferred embodiment, the outer periphery of the distal sealing plug 35 is provided with at least two convex rings 351 spaced apart in the axial direction. Moreover, each convex ring 351 is in sealing engagement with the inner wall of the first cylinder barrel 31.

In order to accurately assemble the axial relative position between the protective tube 14 and the fixed sleeve 8, in one embodiment, the inner wall of the fixed sleeve 8 is provided with a blocking step 85, and the proximal end surface of the protective tube 14 abuts against the blocking step 85.

In order to accurately assemble the fixing sleeve 8 and the first cylinder barrel 31, while the buckle 87 is used to fix the first cylinder barrel 31, in one embodiment, the outer wall of the fixing sleeve 8 is provided with a positioning disk 86. The distal end surface of the cylinder barrel 31 abuts against the positioning plate 86.

The side of the positioning plate 86 facing the inside of the first cylinder 31 is provided with reinforcing ribs 861. The reinforcing ribs 861 can stably fix the positioning plate 86. After entering the first cylinder 31, it can also abut against the inner wall of the first cylinder 31 to prevent The fixing sleeve 8 sways radially. In the circumferential direction of the fixing sleeve 8, the reinforcing ribs 861 and the buckles 87 can be arranged alternately, for example, two reinforcing ribs 861 and the buckles 87 are provided and are evenly alternately arranged along the circumferential direction.

After the buckle 87 is inserted into the first cylinder 31 in the axial direction, accidental loosening can be prevented. Of course, in order to facilitate the assembly of the buckle 87 in place, a positioning hole is provided on the side wall of the first cylinder 31 in one embodiment. The buckle 87 includes an elastic arm 871 extending from the positioning plate 86 into the first cylinder 31, and a hook 872 located at the end of the elastic arm 871 and matched with the positioning hole.

At least two buckles 87 are distributed along the circumferential direction of the fixing sleeve 8 and preferably evenly spaced. The axial ends of the hook 872 are slightly chamfered. When inserted into the first cylinder 31, the elastic arm 871 can be guided to deform and allow each The buckle 87 enters the first cylinder barrel 31 until the hook 872 is located in the positioning hole, at this time the elastic arm 871 is reset, and the fixing sleeve 8 is locked to the first cylinder barrel 31.

Normally, when disassembling, it is necessary to use a tool to push each buckle radially inward, so that the hook 872 is pulled out of the positioning hole, and then pulled out axially. However, the operation is too cumbersome and requires the use of tools. In a preferred embodiment, the hook 872 One side of the circumferential direction is provided with a chamfer structure 873 for guiding the hook 872 to rotate out of the positioning hole in the circumferential direction.

When it needs to be disassembled, the fixed sleeve 8 and the first cylinder 31 are relatively rotated, and the chamfering structure 873 is radially inward under the action of the inner edge of the positioning hole, so that the hook 872 is squeezed out of the positioning hole, and then pulled out axially. The fixed sleeve 8, the operation is more concise, no special tools are needed.

In order to maintain the structural strength around the vent hole 82, in one embodiment, the side wall of the fixing sleeve 8 has a thickened area 88, and the vent hole 82 is opened in the thickened area 88.

In the axial direction, the exhaust gap between the protective tube 14 and the first tube 11 is opened on the proximal side of the protective tube 14, so the exhaust hole 82 is located between the blocking step 85 and the positioning disk 86.

The exhaust hole 82 can be separately connected to the pipeline for exhaust. In order to make full use of the existing hydraulic drive circuit, the exhaust hole 82 can be connected to the hydraulic drive circuit, such as one of the working side ports and the exhaust hole of a multi-way switching valve 82 is connected, the multi-way switching valve has multiple gears, one of the gears is connected to the outlet of the driving pump and the exhaust hole 82, which can be exhausted by liquid filling.

Referring to Figures 7a to 7e, in conjunction with Figures 3a to 3e, this embodiment provides an interventional instrument delivery system, which includes a plurality of tubes 1 coaxially arranged from the inside to the outside, and a mechanism for driving the plurality of tubes 1 to move relative to each other. Control handle 2, the distal end of each tube is used to cooperate with each other to operate the interventional instrument, the proximal end of each tube is connected to the control handle 2, and the control handle 2 is equipped with a cylinder 3 with a piston inside, and multiple tubes 1 penetrate the cylinder The cylinder 3 is connected to the piston or fixed relative to the cylinder 3, and the relative movement of various pipes is driven hydraulically in the cylinder 3;

The cylinder tube 3 includes a plurality of butt-connected sequentially along the axial direction. Two adjacent cylinder tubes are connected by an isolation seal 34. One of the plurality of pipes is slidably sealed and penetrates the isolation seal 34. The isolation seal 34 is detachably connected with two adjacent cylinders by means of buckles 345.

The relative movement of the pipes is driven hydraulically. A cylinder with a piston can be used and hydraulic lines can be configured accordingly. Of course, the above embodiments can also be combined. This embodiment has improved the connection of multiple cylinders, isolating the seal The two ends of 34 are respectively sealed and matched with each cylinder tube, and at the same time, the cylinder tube is positioned by buckles in the axial and circumferential directions to facilitate quick disassembly and assembly.

In an embodiment, the cylinder includes a first cylinder 31 and a second cylinder 32 that are successively butted along the axial direction, wherein the first piston 4 is slidably mounted in the first cylinder 31, and the second cylinder 32 is A second piston 9 is slidably mounted, and the pipe includes a first pipe 11, an intermediate pipe 13 and a second pipe 12 coaxially arranged from the inside to the outside;

All the pipes enter from the distal end of the first cylinder 31. The first pipe 11 is fixed to the first piston 4. After the intermediate pipe 13 extends out of the first piston 4, it enters the second cylinder 32 via the isolation seal 34 and is connected to the second cylinder 32. The piston 9 is fixed, and the first tube 11 extends out of the second piston 9 and is fixed to the proximal end of the second cylinder 32.

In an embodiment, the isolation seal 34 includes:

The cylinder 341, the cylinder 341 has an axial direction, and the two axial ends of the cylinder 341 are respectively inserted into the cylinders on the corresponding side;

Two sealing plugs 346, the two sealing plugs 346 are respectively fixed to the axial end of the cylinder and respectively fit in the inner wall of the cylinder on the corresponding side in a sealing manner, and each sealing plug 346 is provided with an escape hole for the pipe to pass through;

Two sets of buckles 345, two sets of buckles 345 are respectively fixed to the axial end of the cylinder 341 and are respectively engaged with the cylinder on the corresponding side.

The distal and proximal ends of the isolation seal 34 adopt a symmetrical structure, that is, they are connected with the cylinder barrels with the same structural features. Therefore, the following description mainly takes one side as an example, and the other side is the same.

The sealing plug 346 is made of elastic materials such as rubber to facilitate sealing. In order to facilitate the installation of the sealing plug 346, the axial ends of the cylinder 341 are respectively provided with outer flanges 343, and each sealing plug 346 is fixed and sleeved on the corresponding outer flanges. 343 on. At least two protruding rings 3461 spaced apart in the axial direction are provided on the outer periphery of the sealing plug 346, and each protruding ring 3461 is in sealing engagement with the inner wall of the corresponding cylinder. Each convex ring 3461 can form an independent seal to further ensure the sealing effect.

In order to maintain the stability of the relative position, in one embodiment, a positioning disk 342 is provided on the outer circumference of the cylinder 341, and the end surfaces of two adjacent cylinder barrels respectively abut against two opposite sides of the positioning disk 342.

As can be seen in the figure, the first cylinder barrel 31 abuts against the distal side of the positioning plate 342, and the second cylinder barrel 32 abuts against the proximal side of the positioning plate 342. The positioning plate 342 supports and positions each cylinder on the one hand, and also enables The structure between the two cylinders is more compact.

Due to the limited thickness of the positioning plate 342, in order to ensure the structural strength, in one embodiment, reinforcing ribs 344 are respectively provided between the outer circumference of the cylinder 341 and two opposite sides of the positioning plate 342. The reinforcing ribs 344 can prevent the positioning plate 342 from deforming in the axial direction, and improve the overall rigidity of the positioning plate 342.

In a preferred embodiment, in the radial direction of the cylinder 341, the outer edge of the reinforcing rib 344 abuts against the inner wall of the cylinder where it is located. With the support of the reinforcing ribs 344, the two cylinders can be further stabilized in the radial direction.

The reinforcing ribs 344 and the buckles 345 may be arranged alternately at intervals. For example, on the same side of the positioning plate 342, two reinforcing ribs 344 and the buckles 345 are provided and arranged alternately evenly along the circumferential direction.

After the buckle 345 is inserted into each cylinder in the axial direction, it can prevent accidental loosening. Of course, for ease of assembly, that is, the buckle 345 is easy to be placed in place. In one embodiment, the cylinder wall of each cylinder is provided with positioning holes. The buckles are fixed on two opposite sides of the positioning plate 342. Each buckle includes an elastic arm 3451 extending from the positioning plate 342 into the cylinder, and a hook 3452 located at the end of the elastic arm 3451 and matching the positioning hole.

The end of the hook 3452 is provided with a guide inclined surface 3453 that guides itself into the positioning hole along the axial direction of the cylinder. When inserted into the cylinder, the elastic arm 3451 can be guided to deform and allow each buckle 345 to enter the corresponding cylinder until the hook 3452 is located in the positioning hole. At this time, the elastic arm 3451 is reset to lock the isolation seal 34 to the connected Cylinder.

Normally, when disassembling, it is necessary to use a tool to push each buckle radially inward, so that the hook 3452 is pulled out of the positioning hole, and then pulled out axially, but the operation is too cumbersome. In a preferred embodiment, the hook 3452 has a circumferential direction A chamfered structure 3454 is provided on one side to guide the hook 3452 to rotate out of the positioning hole in the circumferential direction.

When it needs to be disassembled, rotate the isolation seal 34 and the cylinder relative to each other. Under the action of the inner edge of the positioning hole, the chamfering structure 3454, the radially inward squeeze hook 3452 escapes the positioning hole, and then pulls off the isolation seal axially 34 and the cylinder, the operation is more concise, no special tools are needed.

Referring to Figures 8a to 8d, in one embodiment, a pipeline joint 113 is provided. For example, a positioning hole is provided on the proximal wall of the second cylinder barrel 32, and a positioning disk 1131 is provided on the outer periphery of the pipeline joint 113. , The end surface of the second cylinder barrel 32 abuts the positioning plate 1131, and the positioning plate 1131 is also provided with a hook 1132 extending into the second cylinder barrel 32 and matched with the positioning hole. The chamfer structure is used to guide the hook 1132 into and out of the positioning hole of the second cylinder 32.

The distal end of the pipeline joint 113 is provided with an outer flange, the proximal sealing plug 36 is sleeved on the outer flange, and the outer periphery of the proximal sealing plug 36 is provided with two convex rings 361, which pass through the two convex rings 361 and The inner wall of the second cylinder barrel 32 is hermetically fitted.

The proximal part of the pipeline connector 113 is provided with a threaded or other quick-connect structure to facilitate connection with an external pipeline, and the distal part of the pipeline connector 113 is relatively fixed to the first pipe 11 and communicated with each other.

The proximal sealing plug 36 has an escape hole, and the proximal end of the first tube 11 can be inserted into and fixed to the escape hole, or further extended and fixed to the inner wall of the pipeline connector 113.

Referring to Figures 3a to 3e, in an embodiment of the present application, in order to further improve the degree of integration, the control handle 2 is also equipped with a hydraulic drive circuit for driving the relative movement of various pipes through a piston. All the hydraulic drive circuits are installed on the control handle 2, which can avoid the use of lengthy external pipelines and reduce the interference of components during hand-held mobile operations.

In one embodiment, the hydraulic drive circuit includes:

The driving pump 5 is connected with the hydraulic pipeline to drive the liquid flow;

The hydraulic pipeline generally refers to the pipeline used to connect the components in the hydraulic drive circuit. Since the hydraulic drive circuit is arranged in the control handle 2, the preferred way is that all or most of the hydraulic pipelines are housed in the control handle 2. Internally, the hydraulic pipelines are omitted from the drawings related to the specific structure in this application. Since the communication relationship of the components has been clearly explained, the hydraulic pipelines can be arranged according to the needs during the implementation process, because the hydraulic pipelines generally use hoses. , So how to store it inside the control handle 2 can be implemented as needed.

The hydraulic pipeline is filled with liquid when in use, and the direction of the liquid flow is changed to push the piston to reciprocate. In order to improve safety, the liquid in the hydraulic drive circuit is physiological saline.

Arrange the corresponding control valve in the hydraulic drive circuit, which can control the liquid flow direction, change the piston movement direction or realize other auxiliary functions. For example, the control valve can include one-way valves respectively arranged at the outlet and inlet of the drive pump 5, and used to switch the movement of the piston. Direction of multi-way switching valve 6.

Referring to Figures 9a-9c, in order to buffer and temporarily store liquid, in one embodiment, the hydraulic drive circuit further includes a liquid storage tank 7 connected with the hydraulic pipeline to temporarily store liquid. The liquid storage tank 7 can also be integrated in the control unit. In the handle 2, in order to fill the liquid in advance or on-site during use, the liquid storage tank 7 is provided with a liquid injection port 71.

The liquid storage tank 7 not only has outlets and inlets connected to the hydraulic pipeline, but also can be equipped with a liquid injection port 71 separately. The liquid injection port 71 can be equipped with a valve separately to connect the external liquid filling equipment. In addition, in the preferred implementation In the example, the driving pump 5 can also be used to realize liquid filling.

With reference to Figures 3a to 3e, in one embodiment, an interventional instrument delivery system is provided, which includes a plurality of pipes 1 coaxially arranged from the inside out, and a control handle 2 that drives the relative movement of the multiple pipes 1. The distal end of each tube is used to cooperate with each other to operate interventional instruments, the proximal end of each tube is connected to the control handle 2, and the control handle 2 is also equipped with a hydraulic drive circuit that drives the relative movement of each tube;

The hydraulic drive circuit includes at least a liquid storage tank 7, and the liquid storage tank 7 includes:

The tank body 75 has a tank port and an inlet 73 and an outlet 74 communicating with the hydraulic drive circuit;

Buffer bag 77, the buffer bag 77 is placed in the tank body 75 and is in a sealed fit with the tank mouth;

The gland 76 is buckled with the tank body 75 and clamps and fixes the buffer bag 77 with the tank mouth.

In order to store liquid in the hydraulic drive circuit and serve as a buffer for sudden changes in fluid pressure, a liquid storage tank 7 can be configured. The tank body 75 is connected to the inlet side of the driving pump 5 in the hydraulic drive circuit, and the volume of the liquid inside the tank body 75 changes. At this time, the pressure can be released by the deformation of the buffer bladder 77.

In order to facilitate the replenishment of body fluids from the outside, in one embodiment, the tank body 75 has a bottom wall on the side away from the tank opening, the bottom wall is provided with a liquid injection port 71, and a pipe joint is installed at the liquid injection port 71.

The pipe joint may be provided with a threaded connection structure that is convenient for disassembly and assembly, wherein the tank body 75 is installed inside the control handle 2, and only the pipe joint is exposed to the control handle 2. In order to avoid interference with the deformation of the buffer bag 77, the inlet 73 and the outlet 74 of the tank body 75 are both adjacent to the bottom wall.

The tank body 75 includes a first tank body 75a and a second tank body 75b that are communicated with each other, and a buffer bag 77 is provided in the first tank body 75a.

The volume of the first tank body 75a is greater than the volume of the second tank body 75b, the top of the first tank body 75a has a tank mouth, and the bottom shape of the first tank body 75a converges and transitions to the second tank body 75b.

The relatively large volume of the first tank body 75a facilitates the configuration of a buffer bag 77 of a corresponding volume and improves the buffer adaptability. The shape of the bottom of the first tank body 75a converges to form a stepped structure. The bottom of the buffer bag 77 can be expanded to the maximum volume. The structure counteracts and plays the role of auxiliary phase, avoiding excessive encroachment on the space of the second tank body 75b.

The buffer bag 77 is made of elastic material, and the internal volume of the tank body 75 is changed by its own deformation. As a preferred embodiment, the bladder wall of the buffer bladder 77 has a corrugated structure that can be stretched and deformed. The expansion or compression of the corrugated structure can guide the volume change trend of the buffer bladder 77, and further increase the volume change range.

In order to avoid the obstruction of the increase of the internal pressure of the buffer bladder 77 when its volume is reduced, in one embodiment, the buffer bladder 77 has an open structure on the side facing the can mouth, and the opening part has an outer flange 771. The edge 771 is clamped and fixed by the gland 76 and the can mouth. When the volume of the buffer bag 77 is reduced, the internal air can be discharged from the opening, so that the corrugated structure is folded flat.

In one embodiment, in order to ensure the sealing effect, the outer flange 771 has an annular protrusion 772 that abuts against the gland 76. The annular protrusion 772 can be regarded as a thickened area and has a larger deformation range. When the gland 76 and the annular protrusion 772 are offset, the deformation of the annular protrusion 772 can compensate for local shape defects or machining errors and ensure sealing. Of course, the corresponding part of the gland 76 can be grooved to accommodate the annular protrusion 772, which is more convenient for positioning and assembly. The groove depth is slightly smaller than that of the annular protrusion 772.

The buffer bladder 77 and the tank body 75 have enclosed a closed space for storing liquid. Therefore, the main function of the pressure cap 76 is to fix the buffer bladder 77. In one embodiment, the pressure cap 76 includes:

The ring frame that clamps and fixes the buffer bag 77 with the can mouth;

An elastic hook 761 extending from the ring frame to one side of the tank body 75 and matched with the tank body 75.

In order to cooperate with the ring frame, the can mouth is turned out to form an interface platform 751. The ring frame and the top surface of the interface platform 751 clamp and fix the buffer bag 77, and the elastic hook 761 abuts against the bottom surface of the interface platform.

The ring frame roughly matches the shape of the interface platform 751. The elastic hooks 761 are generally arranged in pairs to maintain a balanced force. The elastic hooks 761 have a guiding inclined surface that interacts with the interface platform 751, which is convenient for positioning during installation. In order to ensure the sealing effect, On the top surface of the interface platform 751, a flange 752 that abuts against the buffer bag 77 is looped.

Referring to Fig. 10, in one embodiment, the driving pump 5 includes:

Pump housing 51 fixed to the control handle and connected to the hydraulic drive circuit;

A work piece 52 movably installed in the pump housing 51 to drive the flow of liquid;

The driving part 53 movably installed on the control handle and linked with the work part 52;

The return spring 56 acts between the control handle and the driving member 53.

The inside of the pump housing 51 is used to form a pump chamber 57. The pump housing 51 has an inlet 54 and an outlet 55 communicating with the pump chamber 57, and the inlet 54 and outlet 55 are connected to a hydraulic drive circuit.

The control handle can also be equipped with a spare connector 72 for temporary transfer of liquid or replacement of other components.

The working member 52 makes a linear reciprocating motion or a circular motion in the pump housing 51 to drive the liquid to flow, and the common form can be an impeller or a plunger. In one embodiment, the working member 52 is a plunger, and the driving member 53 directly presses the plunger or is linked with the plunger through a transmission mechanism.

The driving part 53 is an electric part, a pneumatic part or a manual part. The function of the driving part 53 is to move the working part 52. The driving part 53 and the working part 52 can be a structure or a separate linkage, according to the form of the power source Different, in order to simplify the structure, it is preferable to use manual parts, that is, to actuate the power parts 52 by manual operation. Of course, the basic functions can also be realized by electric or pneumatic.

In one embodiment, the manual part is an operating button that is slidably or rotatedly mounted on the control handle.

In one embodiment, the driving member 53 has a shaft hole 531 and is mounted on the control handle through a rotating shaft. The control handle includes a working part for providing a hydraulic chamber and a holding part 22 connected to the working part. The operating button is installed on the control handle. Holding part 22. So that the pump 5 can be driven with one hand while being held.

In an embodiment, the driving pump 5 further includes a reset member acting between the operating button and the control handle. The driving part 53 and the working part 52 can be matched with each other, and can also be connected by a limiting structure or a traction part, so that the driving part 53 can simultaneously drive the working part 52 to reciprocate at the time when the driving part 53 is reset. A resetting member may be provided between the driving member 53 and the control handle, such as a compression spring or a tension spring acting with the driving member 53, or a coil spring installed on the rotating shaft, such as a reset spring 56, in order to make the working member 52 reciprocate, The resetting member can also directly act on the working member 52, for example, a compression spring located in the pump chamber 57 that directly opposes the working member 52. During use, the driving member 53 is repeatedly pressed, and then the working member 52 is driven to make the liquid flow in the hydraulic driving circuit.

Referring to Figures 11a to 11f and Figures 12a to 12d, in one embodiment, the control valve adopts a multi-way switching valve 6, which has a drive side interface 67 communicating with the inlet and outlet of the drive pump 5, and A plurality of working-side ports 68, wherein every two working-side ports are connected to one of the hydraulic chambers, and the multi-way switching valve 6 has multiple gear positions for switching the communication relationship between the driving-side ports and different working-side ports, To control the direction of liquid flow.

The multi-way switching valve 6 can switch the communication relationship between the outlet and the inlet of each hydraulic chamber and the driving pump 5 through different gears, so that the movement direction of the piston can be changed. A one-way valve can be configured as required to avoid unnecessary backflow of liquid at the driving pump 5 and ensure the efficiency of liquid delivery.

The driving-side interface and the working-side interface are only distinguished according to different connecting parts, and for the multi-way switching valve 6 itself, there are only a plurality of different interfaces.

In one embodiment, the multi-port switching valve 6 includes a valve seat 61 and a valve core 62 that cooperate with each other. The valve seat 61 has a valve cavity in it. The side wall of the valve cavity is provided with a plurality of ports 65 for connecting the driving pump and each In the hydraulic chamber, the valve core 62 is placed in the valve chamber and is rotated and matched. The outer peripheral wall of the valve core 62 is provided with multiple flow passages 66. When the valve core 62 rotates to different positions, there is a gap between the multiple flow passages 66 and the multiple interfaces 65. In order to facilitate identification of the corresponding communication relationship, in one embodiment, the multi-way switching valve 6 is embedded in the control handle 2, and the control handle 2 is provided with a mark 64 indicating the gear position of the multi-way switching valve 6.

The spool 62 is connected with a wrench 63. When the wrench is rotated to different angles, it points to the marks 64 of different gears. In this embodiment, in order to match the functions of different gears, seven runners 66 (pointed by the arrows in the figure) are provided. Of course The runner 66 can also increase or decrease according to the function to be realized.

In an embodiment, the control valve further includes:

With two one-way valves, the outlet of the drive pump 5 is connected to the liquid storage tank 7 through the first one-way valve; the drive side interface of the multi-way switching valve is connected with the inlet of the drive pump 5 through the second one-way valve.

In order to further indicate the operation, the multi-way switching valve 6 is embedded in the control handle 2, and the control handle 2 is provided with a mark indicating the gear position of the multi-way switching valve 6.

Referring to FIGS. 3a and 3b, although the shape of the control handle 2 is not strictly limited, for ease of operation, in some embodiments, the control handle 2 includes a working part 21 and a holding part 22 connected to the working part 21. The cylinder 3 is located in the working part 21, that is, the working part 21 as a whole is used to provide a hydraulic chamber. The working part 21 also has opposite distal ends 211 and proximal ends 212, and the expression of the relative orientation is similar to other components.

The shape of the gripping portion 22 is convenient for gripping operations. For example, it has a longitudinal direction as a whole. Since the working portion 21 is equipped with a cylinder, the movement direction of the piston in the cylinder is the axial direction of the cylinder, and the longitudinal direction of the gripping portion 22 is approximately It is perpendicular to the cylinder axis, or slightly oblique. The working part 21 and the grip part 22 are L-shaped or T-shaped as a whole. In order to further improve the feeling of holding a hand and conform to the shape of the hand, the overall shape of the control handle 2 is similar to the shape of a pistol. In the hydraulic drive circuit, some control components that need to be operated in real time, such as switches, etc., can be provided in the grip 22 to facilitate one-handed operation.

In order to facilitate one-handed operation, an interventional instrument delivery system is provided in an embodiment of the present application, which includes a plurality of tubes arranged coaxially from the inside out, and a control handle 2 for driving the relative movement of the plurality of tubes. The proximal end of each tube is connected to the control handle 2. The control handle 2 is equipped with a hydraulic drive circuit for driving the relative movement of each tube. The hydraulic drive circuit includes at least one device for driving the flow of liquid. Drive pump 5 and control valve to control the direction of liquid flow;

The control handle 2 is provided with a holding portion 22, an operating component for driving the pump 5 is disposed on the holding portion 22, and the operating component of the control valve is adjacent to the holding portion 22.

In order to make the hydraulic drive circuit work, a simpler and more direct way is to use manual operation. During the operation, the components that need to be frequently operated are the drive pump 5 and the control valve. The operating components of both are set in the grip 22 or adjacent to the grip. The part 22 is convenient to hold with one hand and can also perform corresponding operations at the same time, which is convenient for the other hand to operate or support other equipment.

Referring to Figure 3a, Figure 3b, Figure 12a-12e, in one embodiment, the control valve adopts a multi-way switching valve 6. The interventional instrument delivery system in this embodiment includes multiple tubes coaxially arranged from the inside to the outside And the control handle 2 that drives the relative movement of multiple pipes. The distal end of each pipe is used to cooperate with each other to operate the interventional instrument. The proximal end of each pipe is connected to the control handle 2. The control handle 2 is also configured to drive the relative movement of each pipe. The hydraulic drive circuit includes a multi-way switching valve 6 that switches the direction of liquid flow. The multi-way switching valve 6 includes:

Two valve seats arranged oppositely, one valve seat is provided with a hydraulic drive circuit drive side interface 67, and the other valve seat is provided with a working side interface 68 connected to the hydraulic drive circuit;

The valve core 62 is sealed and buckled by the two valve seats and installed in rotation. The valve core 62 has a communication hole 624. When the valve core 62 rotates to different angles, the communication hole 624 connects the corresponding drive side port 67 and the working side port 68 ；

The wrench 63 linked with the valve core 62 is used to change the rotation angle of the valve core 62.

Referring to Figure 3a, Figure 3b, Figure 12a~Figure 12e, in order to facilitate one-handed operation and switching modes (ie switching gears), one embodiment provides an interventional instrument delivery system, including a coaxial arrangement from the inside to the outside Multiple pipe fittings, and a control handle 2 that drives the relative movement of the multiple pipe fittings. The distal end of each pipe fitting is used to cooperate with each other to operate interventional instruments. The proximal end of each pipe fitting is connected to the control handle 2, and the control handle 2 is also equipped with a drive unit. A hydraulic drive circuit for the relative movement of pipes; the hydraulic drive circuit includes a multi-way switching valve 6 for switching the direction of liquid flow, and the multi-way switching valve 6 includes:

Two valve seats arranged oppositely, one valve seat is provided with a drive side interface 67 connected to the hydraulic drive circuit, and the other valve seat is provided with a working side interface 68 connected to the hydraulic drive circuit;

A wrench 63 linked with the valve core 62 through a one-way clutch mechanism is used to change the rotation angle of the valve core 62;

A wrench reset member 69 acting on the wrench 63 and at least one valve seat.

In this embodiment, the wrench 63 and the valve core 62 are driven by a one-way clutch mechanism, that is, the switching of each gear is performed by the valve core 62 one-way rotation instead of reciprocating two-way rotation. It is more conducive for a single finger to pull the wrench, which is in line with the physiological structure of the operator's fingers. In the hydraulic drive circuit, the power of the liquid flow can adopt the existing technology or be combined with the drive pump 5 in other embodiments.

With reference to Figures 3a to 3e, in one embodiment, the control handle 2 includes a working part 21 and a holding part 22 connected to the working part 21. The working part 21 is equipped with a cylinder 3 with a piston inside, and multiple pipes. The penetrating cylinder 3 is connected to the piston or fixed relative to the cylinder 3, and the relative movement of various pipes is hydraulically driven in the cylinder 3;

The cylinder barrel 3 is respectively connected with corresponding working side ports 68 on both sides of the piston, and the hydraulic drive circuit further includes a driving pump 5 connected with each driving side port 67 to drive the flow of liquid.

In an embodiment, the cylinder tube 3 includes a first cylinder tube 31 and a second cylinder tube 32 that are successively butted along the axial direction, wherein the first piston 4 is slidably mounted in the first cylinder tube 31, and the second cylinder tube 32 A second piston 9 is slidably installed inside, and the pipe includes a first pipe 11, an intermediate pipe 13 and a second pipe 12 coaxially arranged from the inside to the outside;

With reference to Fig. 10, in an embodiment, the driving pump 5 includes:

The pump housing 51 fixed in the control handle 2 and connected to the hydraulic drive circuit;

The drive member 53 movably installed on the grip 22 and linked with the working member 52;

The return spring 56 acts between the control handle 2 and the driving member 53.

The outlet 55 and the inlet 54 of the driving pump 5 are both opened on the pump housing 51, and there are two driving-side ports 67 of the multi-way switching valve 6, which are connected to the outlet 55 and the inlet 54 of the driving pump 5, respectively. It is also possible to combine the aforementioned related embodiments to configure the necessary one-way valve and the liquid storage tank 7 connected between the inlet 54 and the corresponding drive-side interface 67.

The positional relationship among the wrench 63, the grip part 22, and the working part 21 also has a certain influence on the convenience of operation. In one embodiment, the wrench 63 and the grip part 22 are on the same side in the radial direction of the working part 21. . During operation, the wrench 63 and the holding part 22 are generally closer to the operator, while the working part is relatively far away from the operator.

In a preferred embodiment, the wrench 63 is located on the proximal side of the grip 22 and the driving member 53 faces the wrench 63. The operation can be similar to the way of a pistol, the index finger pulls the wrench 63, and the remaining four fingers hold the grip 22 and can simultaneously press and hold the driving member 53 to drive the drive pump 5. When you need to change gears, you can pull the wrench 63. The holding of the control handle 2 and the control of the hydraulic drive circuit can be completed with one hand, which greatly liberates manpower and avoids the inconvenience of multiple people's cooperation.

In order to prevent slippage during gripping, an anti-dropping blocking member 28 is also provided at the end of the gripping portion 22 (that is, the end away from the working portion 21). The anti-dropping block 28 can extend to the distal end and bridge to other parts of the housing of the control handle 2. The anti-dropping block 28 is strip-shaped and extends along a smooth curve, which can further improve the hand feeling.

In order to cooperate with the operation of the wrench 63 and improve the stability of holding, in one embodiment, the anti-dropping block 28 surrounds the wrench 63. That is, the wrench 63 is located in a closed area.

The valve core 62 and the wrench 63 may be separated and linked, or may adopt an integrated structure. The end of the wrench 63 is hook-shaped, which is convenient for hooking operation.

In the related embodiments of FIGS. 12a to 12e, the multi-way switching valve 6 has multiple gear positions for switching the communication relationship between the drive side interface 67 and the different working side interfaces 68 to control the liquid flow direction. The valve seat 61 is buckled in two parts, and the valve core 62 rotates between the two, and when it rotates to different angles, it corresponds to different gears. Other details or improvements of the multi-way switching valve 6 will be further described below.

Since the valve core 62 and the valve seat 61 are rotated and matched, it is necessary to ensure that they are sealed to each other. When there is sufficient processing accuracy, they can be closely attached to each other, but undoubtedly put forward more stringent requirements on materials and processes, in order to reduce process requirements and facilitate processing In one embodiment, each valve seat is provided with an installation groove on the side facing the valve core 62, a sealing gasket is fixedly embedded in the installation groove, and the valve core 62 is sealed against and sealed by the sealing gasket.

In one embodiment, the positioning method of the sealing gasket is as follows: positioning teeth engaged with each other are provided between the inner peripheral edge of the installation groove and the outer peripheral edge of the sealing gasket. Of course, other fixing methods can also be used for positioning. In this embodiment, positioning teeth are used to eliminate other positioning components, and glue bonding is not required. During assembly, the gasket can be aligned and pressed into the installation groove, which is convenient for operation.

The interlocking positioning teeth can prevent the sealing gasket from rotating with the valve core 62. For example, the second positioning teeth 614 are provided on the inner periphery of the installation groove of the first valve seat 61a in the figure, and the outer circumference of the first sealing gasket 611 in the installation groove The edge is provided with first positioning teeth 6111 that mesh with the second positioning teeth 614. Similarly, in the figure, the inner periphery of the installation groove of the second valve seat 61b is provided with a third positioning tooth 615, and the outer periphery of the second sealing gasket 617 in the installation groove is provided with a fourth positioning tooth that meshes with the third positioning tooth 615. 6171.

The sealing gasket can be made of elastic materials such as rubber to facilitate the maintenance of the necessary sealing. In addition, the valve seat or other parts can also be made of transparent materials, which facilitates the observation and verification of the position during assembly and the visual operation during use.

Among the two valve seats, one of the valve seats is a first valve seat 61a provided with a driving side interface 67, and the other valve seat is a second valve seat 61b provided with a working side interface 68;

The first valve seat 61a is provided on the side facing the valve core with a liquid inlet 613 communicating with the drive-side interface 67, and the first sealing gasket 611 embedded in the first valve seat 61a is provided with a position corresponding to the liquid inlet 613. Corresponding and mutually connected first via holes 6112;

The second valve seat 61b is provided with a liquid outlet hole 616 communicating with the working side interface 68 on the side facing the valve core, and the second sealing gasket 617 embedded in the second valve seat 61b is provided with the liquid outlet hole 616 position Corresponding and mutually connected second liquid passage holes 6172;

When the valve core rotates to different angles, the communication hole 624 on the valve core connects the corresponding first liquid passage hole 6112 and the second liquid passage hole 6172.

There are two drive-side ports 67 on the first valve seat 61a, which are respectively connected to the inlet and outlet of the drive pump 5. Correspondingly, the liquid inlet 613 and the communication hole 624 are also arranged in one-to-one correspondence. A cap 618 may also be provided on the side of the seat 61a facing away from the other valve seat.

The working-side ports 68 on the second valve seat 61b are configured according to the number of gears. For example, in the relevant drawings of this embodiment, there are four working-side ports 68, and the liquid outlet holes 616 are also configured with four one-to-one correspondences. For convenience Switch gears, the second sealing gasket 617 has multiple second liquid passage holes 6172, for example, there are eight in this embodiment, and every two second liquid passage holes 6172 are connected to one of the liquid holes 616, and the valve core 62 rotates At different angles, the two communicating holes 624 correspond to the two second liquid passage holes 6172 at the corresponding positions, and the two second liquid passage holes 6172 at this position are just in communication with the corresponding two liquid outlet holes 616, in order to adapt to The distribution of the second fluid holes 6172, each fluid hole 616 extends into a strip shape, that is, the same fluid hole 616 can be connected to multiple second fluid holes 6172 to ensure that the position of the second sealing gasket 617 remains unchanged Next, the positions of the two communication holes 624 change.

There are two liquid inlet holes 613, and each liquid inlet hole 613 is at a different radial position relative to the rotation axis of the valve core; the first liquid hole 6112 matches the position of the corresponding liquid inlet hole 613;

The valve core 62 is provided with two inner and outer annular grooves 623 on the side facing the first valve seat 61a. Each annular groove 623 communicates with one of the liquid inlet holes 613, and the two communicating holes 624 respectively communicate with one of the annular grooves 623. .

No matter the valve core 62 rotates to any angle, the inner and outer annular grooves 623 can ensure the communication with the liquid inlet 613 corresponding to the radial position.

The valve core 62 is rotated and installed between the two valve seats by the rotating shaft 621. The valve core 62 and the wrench 63 are linked by a one-way clutch mechanism, that is, the wrench 63 can only drive the valve core 62 to rotate in one direction (circumferential direction). After 63 moves in place, the wrench resetting member 69 drives the wrench 63 to reset, while the valve core 62 remains stationary, and the cycle starts again, which can drive the valve core 62 to switch to various gear positions.

In one embodiment, the wrench 63 includes an annular sleeve 631 on the outer periphery of the valve core 62, and a hook portion 633 fixed to the annular sleeve 631 and extending to the outside of the control handle 2; the inner edge of the annular sleeve 631 and the valve core 62 The outer peripheries are linked by a one-way clutch mechanism that cooperates with each other.

The hooking portion 633 is used for finger pulling operations, and is preferably hook-shaped and located on the proximal side of the gripping portion 22. The two valve seats are provided with positioning posts inserted into each other and fixed with fasteners. In order to limit the limit angle of each rotation of the wrench 63, a corresponding stopper or two valves can be provided on the valve seat 61 A limit bar hole is enclosed between the seats, the hook portion 633 moves in the limit bar hole, and the length of the limit bar hole limits the movement stroke of the hook portion 633.

One-way clutch mechanism includes:

Ratchet teeth 622 arranged around the outer periphery of the valve core 62;

The elastic claw 632 fixed on the inner circumference of the annular sleeve 631;

The wrench 63 has relative positive and reverse directions relative to the direction of rotation of the valve core 62. When rotating in the forward direction, the elastic pawl 632 meshes with the ratchet tooth 622 to drive the valve core 62. When rotating in the reverse direction, the elastic pawl 632 deforms and the ratchet tooth 622 slips off, and the wrench resetting member 69 drives the wrench 63 to rotate in the reverse direction.

The tooth surface of the ratchet tooth 622 has a specific orientation, one side can be engaged with the elastic pawl 632, and the other side can make the elastic pawl 632 slide out, and the elastic pawl 632 extends substantially in the circumferential direction, allowing the spool to be ratcheted when the valve core is reversed. The pressure of the teeth 622 retracts radially inward and then slips out of each other, and then expands and resets radially outwards under the action of its own elasticity. At this time, if the valve core 62 rotates forward, it will mesh with the previously slipped ratchet tooth 622 to interlock again.

In order to better cooperate with the ratchet teeth 622, in one embodiment, the elastic claws 632 extend along the circumferential direction of the annular sleeve 631 and bend inward. Two to four elastic claws 632 are evenly distributed along the circumferential direction of the annular sleeve 631.

The wrench resetting member 69 is a coil spring extending around the axis of the valve core, one end of the coil spring is connected with the valve seat 61, and the other end is connected with the ring sleeve 631.

When the wrench 63 drives the valve core 62 to rotate in the forward direction, it overcomes the elastic force of the coil spring to accumulate the energy of the coil spring. When the wrench 63 is released, the coil spring drives the wrench to reverse rotation and reset. In order to balance the force, in one embodiment, the coil spring is The two side-by-side turns, in the axial direction of the valve core 62, each coil spring is located on both sides of the ring sleeve 631, and one end of each coil spring has a positioning bend 692 inserted into the corresponding side valve seat, and each coil spring The other ends of the ring are connected to each other to form a positioning crossbar 691, and the outer periphery of the annular sleeve 631 is provided with a slot 634 for accommodating the positioning crossbar 691.

Correspondingly, each valve seat is provided with an insertion hole 619 into which the positioning bend 692 is inserted.

In order to further stabilize the position before and after the deformation of the coil spring, in one embodiment, in the axial direction of the valve core, the outer periphery of the valve core 62 includes three sections. The ratchet teeth 622 are fixedly distributed in the middle section, and the smooth sections 625 are located on both sides. , The two coil springs are respectively sleeved on the smooth section 625 on the corresponding side.

Referring to Figures 13a-13b, in an embodiment of the interventional instrument delivery system of the present application, two cylinders are used, namely a first cylinder 31 and a second cylinder 32. The first cylinder 31 is equipped with a first piston 4, The first cylinder 31 has a communication port 314 and a communication port 315; the second cylinder 32 is equipped with a second piston 9 and the second cylinder 32 has a communication port 324 and a communication port 325.

The pipes that move relative to each other in the axial direction include a second pipe fixedly connected to the first piston 4, an intermediate pipe fixedly connected to the second piston 9, and a first pipe fixedly connected to the control handle. In addition, the control handle also passes through a fixing sleeve 8. A protective tube at the outer periphery of the second pipe is connected, and the fixing sleeve 8 connected with the protective tube is provided with an exhaust hole 82.

The hydraulic drive circuit is also equipped with a multi-port switching valve 6, a drive pump 5 with an inlet 54 and an outlet 55, and a liquid storage tank 7 with an inlet 73 and an outlet 74. A first check valve 331 is connected to the inlet 54 of the driving pump 5; a second check valve 332 is connected to the outlet 55 of the driving pump 5. The various components are communicated through corresponding hydraulic lines 33.

In this embodiment, the multi-port switching valve 6 has seven ports in total, two of which are drive-side ports 67, which are respectively connected to the outlet and inlet of the drive pump 5 (indirectly communicated through a one-way valve and a liquid storage tank). The other five switching valves 6 are working side ports 68, two of which are connected to the two communicating ports of the first cylinder barrel 31, the other two are connected to the two communicating ports of the second cylinder barrel 32, and one is connected to the exhaust port 82. .

If the exhaust is equipped with a separate pipeline, a multi-port switching valve with six ports can also be used, that is, two are drive-side ports 67, which are respectively connected to the outlet and inlet of the drive pump 5 (through the one-way valve and the liquid storage The tank is indirectly connected), the other four multi-port switching valves are working side ports 68, two of which are connected to the two communication ports of the first cylinder 31, and the other two are connected to the two communication ports of the second cylinder 32.

In the multi-port switching valve 6 through multiple flow passages 66 on the spool, the corresponding drive-side port 67 and the working-side port 68 can be connected. Taking the multi-port switching valve 6 as an example, there are seven ports in total, based on different communication relationships It can be divided into five gears D1～D5, and each gear has different functions.

Specifically, the functions of each gear are as follows:

Take the multi-port switching valve 6 as an example with six ports, two of which are the drive-side ports 67, which are respectively connected to the outlet and inlet of the driving pump 5 (indirectly communicated through the one-way valve and the liquid storage tank), the multi-port switching valve 6 The other four are working side ports 68, two of which are connected to the two communicating ports of the first cylinder barrel 31, and the other two are connected to the two communicating ports of the second cylinder barrel 32. Based on the different communication relationships, they can be divided into the table above. There are four gears D1～D4, and each gear realizes different functions. Regarding the exhaust, a separate pipeline is provided. The exhaust hole 82 is connected to a connector through the pipeline, and the connector can be embedded in the housing of the control handle so as to cooperate with the external pipeline to exhaust by adding physiological saline. .

Referring to Figures 14a-17, some of the following embodiments provide interventional device release control mechanisms, that is, the mutually sliding and nested tubes cooperate to release or recover the interventional instrument at the distal end, and the control method of the proximal end of each tube can be Combining the control handles of the foregoing embodiments, conventional mechanical transmission or electric transmission control handle structures can also be used. Of course, when the aforementioned hydraulically driven control handles are used, the liquid pressure can be detected by the sensing device, and then the force can be corresponding to the distal end. Or the relative stroke of the pipe fittings is more convenient for fine operation, and it also provides the necessary hardware foundation for fully automatic mode or combined closed-loop control.

One of the embodiments provides an interventional instrument release control mechanism, which includes a first tube 11, an intermediate tube 13, and a second tube 12 that are slidably nested and fitted from the inside to the outside. The distal end of the first tube 11 extends from the middle tube. 13, and the extended part is provided with a mounting head 112 for connecting interventional instruments, and the middle tube 13 is connected with a flexible control part, and the control part has:

The holding state, in the holding state, the control member penetrates the mounting head 112 and binds the interventional instrument to the mounting head 112;

The open state allows the interventional instrument to be completely separated from the mounting head 112;

The middle tube 13 is equipped with a lock 162 that cooperates with the control member. The lock 162 is slidingly fitted with the middle tube 13 and switches different states of the control member when sliding.

The holding state is understood as the lock member is still in the locked state, for example inserted in the lock hole, the control member binds the interventional instrument to the mounting head, and it is not strictly required that the interventional instrument and the mounting head contact, but should be understood as controlling Under traction, the installation head cannot be completely separated from the installation head. Of course, the interventional instrument and the installation head interfere or interfere in space, which is more conducive to the positioning of the interventional instrument. The release of the interventional instrument is a gradual process, but as long as the lock is still in the locked state Even if the interventional instrument and the installation head are loose or even far away from each other, the control part is still in a holding state, that is, the interventional instrument cannot be completely separated from the installation head and released.

Correspondingly, the open state of the control member is understood to mean that the lock member is unlocked, for example, out of the lock hole. At this time, the control member can be separated from the lock member, which also means that the interventional instrument and the control member can be separated from each other. The instrument is retracted proximally after being released in place, so before or at the initial stage of withdrawal, there is still contact or entanglement between the control member and the interventional instrument, but since the lock has been unlocked, the emphasis here is to allow intervention A state in which the instrument and the control member are separated from each other, instead of emphasizing that the two are separated from each other in space and no contact, because of the loss of the restraint of the control member, of course, the interventional instrument is allowed to be completely separated from the mounting head.

In the figure, the first tube 11 is fixed by inserting at both ends, that is, it includes a distal section 11a, a proximal section 11b, one end of the distal section 11a has a guide head 111, the other end is inserted into the proximal section 11b, and the mounting head 112 is in the proximal section. The ends of the end section 11b, the 11 sections of the first pipe fitting, and the mounting head 112 can be fixed to each other by means of welding or the like.

The interventional instrument takes the stent 10 as an example. The proximal side generally has a connecting ear 101. The connecting ear is provided with a connecting hole or hook for connecting with the control member. The flexible material of the control member is convenient for operations such as bending, winding, and knotting.

In one embodiment, the control member is a lashing wire 18, and the proximal end of the interventional instrument is provided with a plurality of connecting ears 101. In the holding state, the lashing wire 18 directly passes through and pulls each connecting ear 101;

Or, a ring-shaped wire sleeve 19 is inserted between the connecting ears 101. In the holding state, the binding wire 18 bypasses the ring-shaped wire sleeve 19 and indirectly pulls the connecting ear 101 through the ring-shaped wire sleeve 19.

After the interventional device of the looped wire sleeve 19 is released, the looped wire sleeve 19 can be retained in the interventional device and will not be removed with the lashing wire 18, and the connecting ear can be directly pulled relative to the lashing wire 18 itself. The looped wire sleeve 19 can be pre-assembled on the interventional device for use It is easier to operate when the scene and the lashing line 18 are wound around each other, and the stroke of the relative movement pipe is optimized.

The lashing wire 18 is used to bind and pull the connecting ear, and then control the release process to prevent the stent 10 from suddenly expanding radially and puncturing the body tissue. The lashing wire 18 can be made of commonly used materials and strengths in the interventional field, and is between the connecting ear 101 Can be connected directly or indirectly.

Tightening the lashing wire 18 proximally can make the connecting ear 101 converge toward the distal side of the mounting head 112. As long as the lashing wire 18 is maintained in a holding state, the release of the stent 10 can be restricted. Of course, the release and recovery of the stent 10 are In the opposite process, the dynamic coordination between the components is the same.

In order to reasonably distribute the force application positions when pulling the stent 10, multiple binding wires 18 may be used, and the pulling positions of each binding wire 18 and the loop wire sleeve 19 are evenly distributed along the circumferential direction of the interventional instrument.

When the lashing wire 18 directly pulls the connecting ear 101, the number of lashing wires 18 is not easy to be too many, otherwise it may affect the size after compression and affect the loading. For example, the number of connecting ears 101 is slightly less, so that the connecting ears 101 can be divided into Multiple groups, each group corresponds to a lashing line 18.

The lock 162 is installed on the middle tube 13, and the function of the lock 162 is to limit at least one end of the lashing wire 18, for example, one end of the lashing wire 18 never leaves the middle tube, and the other end is passed through the connecting ear 101. Connected to the lock 162, thus forming a bondage to the bracket 10. Once the lock releases the binding wire 18, this end is no longer pulling the bracket 10, allowing the bracket 10 to expand and release until finally the end is pulled out from the connecting ear 101 .

The lashing wire 18 is knotted or twisted to form a loop. The lock 162 is inserted into the loop to bind the lashing wire 18. When the lock moves, the loop can be withdrawn, that is, the interventional device is allowed to completely detach from the mounting head 112.

When the lock 162 slides relative to the middle tube 13, corresponding driving means can be used. For example, a transmission member is provided at the proximal end, or when the middle tube 13 is actively moving, the lock 162 moves relative to each other, or the middle tube 13 carries the lock 162. After moving to the preset position, only the lock 162 is blocked, forming a relative movement with the middle tube 13. Of course, improved solutions are also provided in some embodiments below.

Separate configuration of the transmission member may further complicate the structure of the control handle. In order to simplify the corresponding structure, in some embodiments, a solution is provided in which the lock member and the intermediate pipe member follow and release the lashing wire 18 in a passive manner.

In one embodiment, an interventional instrument release control mechanism is provided, which includes a first tube 11, an intermediate tube 13, and a second tube 12 that are slidably nested and fitted from the inside to the outside. The distal end of the first tube 11 extends out of the middle tube. 13, and the extended part is provided with a mounting head 112 for connecting the interventional instrument, and a flexible control member is connected to the intermediate tube 13. The control member has a holding state for binding the interventional instrument to the mounting head 112 and allows the interventional instrument Completely break away from the open state of the mounting head 112;

A lock 162 is movably installed on the middle tube 13 and the lock 162 is configured to limit the control member in a holding state. When the middle tube 13 moves relative to the first tube 11, the lock 162 is triggered by the mounting head 112 and releases the control. The file enters an open state.

In this embodiment, when the intermediate pipe 13 moves relative to the first pipe 11, the lock 162 follows. Although it is movably installed with the intermediate pipe 13, it can maintain a certain amount of friction or other separation resistance between each other. The intermediate pipe 13 follows the way. For example, in one embodiment, a fixed base 15 and a slidable movable seat 16 are installed on the intermediate pipe 13, and the lock 162 is fixed to the movable seat 16. In the holding state, the base 15 and the movable seat 16 are Tightly fit, when the middle tube 13 moves to the distal end relative to the first tube 11, the movable seat 16 moves with the base 15, and the lock 162 is blocked, so that the base 15 and the movable seat 16 move away from each other, that is, the release control member enters the open state .

The way that the lock 162 is blocked can be directly abutted against the mounting head through indirect force applied by the transmission component. Taking an indirect way as an example, an unlocking rod 163 is fixed on the movable seat 16, and the unlocking rod 163 is close to the lock 162. The two ends can be connected by a ring portion 161, and the three constitute the movable seat 16. The ring portion 161 can be slidably sleeved on the outer periphery of the intermediate pipe member 13. When the intermediate pipe member 13 moves distally with respect to the first pipe member 11, until the unlocking lever 163 and the installation When the head 112 abuts, if the middle tube 13 is further pushed at this time, the movable seat 16 overcomes the tight fitting resistance with the base 15 and moves away from the base 15 so that the lock 162 releases the lashing wire 18.

The tight fit between the base 15 and the movable seat 16 may be that the unlocking rod 163 penetrates the base 15 and is tightly fitted at the penetration part, or at least one of the unlocking rod 163 and the lock 162 is pulled by the lashing wire 18 The bases abut against each other and have friction resistance that can at least follow each other.

When the middle tube 13 moves relative to the first tube 11, the movement direction of the middle tube 13 is from the proximal end to the distal end; when the lock 162 is triggered to unlock by the mounting head 112, the movement direction of the lock 162 is from the distal end to the proximal end .

In the present application, when the lock 162 is unlocked, the operator pushes the middle tube to the distal end instead of directly pulling the lock 162 to the proximal end. The process of pushing the middle tube to the distal end is not immediately unlocked. When the middle tube is pushed by the end, the control part will follow and keep the interventional instrument bound. Therefore, the controllable stage is longer during the release of the interventional instrument, which is convenient for emergency recovery at any time during the release process. On the contrary, if the locking member 162 is directly pulled to the proximal end when unlocking, the control of the interventional instrument will be lost prematurely.

The base 15 can be provided with a lock hole 1522 that is matched with the lock member 162. When the distal end of the lock member 162 is inserted into the lock hole 1522, the lashing wire 18 is sheathed on the lock member 162, so it is in a holding state. 1522, the lashing wire 18 is allowed to escape from the lock 162 and switch to the open state.

The control part binds the interventional instrument to the mounting head 112, mainly to restrict the interventional instrument from being completely expanded radially and completely detached from the mounting head 112, especially the compressed state of the interventional instrument after being loaded, that is, being wrapped in the second tube 12, all The connecting ear 101 abuts against the distal end side of the mounting head 112 under the pulling of the control member. In order to guide the connecting ears in position, they are not easy to be staggered with each other. The mounting head 112 is further improved in the following embodiments.

The intermediate tube 13 is on the proximal side of the mounting head 112, and the interventional instrument is on the distal side of the mounting head 112. The mounting head 112 is provided with a converging guide hole 1121. The converging guide hole 1121 is used for the control member to guide and intervene. The proximal side of the interventional device is restricted to the constriction guide hole 1121 in the holding state.

On the one hand, the constriction guide hole 1121 can guide and limit the extension path of the control element, and under the pulling of the control element, the connecting ears can gather each other and converge into the constriction guide hole 1121, which facilitates the loading of interventional instruments. And keep it in a compressed state, especially during recycling, its guiding role is more prominent.

When the interventional device is released, the control member gradually moves to the distal end, and the divergence and expansion of each connecting ear 101 is also gradual. Through the release speed of the control member, the bounce force of the sudden expansion of the connecting ear 101 can prevent the surrounding tissues in the body from being damaged.

The control member extends from the middle tube 13 to the distal end to connect the interventional instrument and then returns to the middle tube 13 proximally. In the holding state, the control member is guided back and forth with respect to the mounting head 112, and at least one of the back and forth paths The person passes through the constriction guide hole 1121.

In a preferred embodiment, both the back and forth paths of the control member pass through the converging guide hole 1121. Avoid extension on the outer circumference of the mounting head 112 as much as possible to reduce interference with other components. In order to improve the effect of converging and guiding, in a further preferred embodiment, there are one or more control elements, and for the same control element, there are The path passes through the same converging guide hole 1121.

In order to facilitate assembly and have a regular outer peripheral shape, in one embodiment, the mounting head 112 is cylindrical and has an axial through hole, and the first pipe 11 penetrates the axial through hole. The mounting head 112 and the first pipe member 11 are fixed to each other by at least one of welding, bonding, interference fit, and auxiliary connecting member.

In other embodiments, the mounting head 112 may also be an annular member with a through hole in the middle, such as an annular piece.

In order to reasonably distribute the pulling force in the circumferential direction and make the connecting ear have a suitable constriction tendency, in one embodiment, there are multiple constriction guide holes 1121, and the proximal side of the interventional instrument is provided with a connection for piercing the control member. The ears 101 and the connecting ears 101 are divided into multiple groups. Before the interventional device is released, the connecting ears of the same group are gathered to a corresponding constriction guide hole 1121.

In order to match the grouping manner of the connecting ears 101, a plurality of converging guide holes 1121 are evenly distributed along the circumferential direction of the mounting head 112.

Combined with the number of groups of the connecting ears 101, the number of the converging guide holes 1121 is 2 to 4. Excessive number of groups or no grouping can make the distribution of the stress points more uniform, but it will cause the arrangement of the locks and controls to be too complicated, which is not conducive to compression loading. The converging guide hole 1121 extends along the axial direction of the first tube 11 and penetrates the mounting head 112. In order to prevent the control member from reducing interference and friction with other components (for example, to reduce friction with the inner wall of the second pipe member 12), the converging guide hole 1121 extends inside the mounting head 112, and is only open at both axial ends of the mounting head 112, that is, It is not exposed to the outer circumference of the mounting head 112.

In a preferred embodiment, the converging guide hole 1121 has a guide flaring 1122 at the opening on the distal side. It is more convenient for the connecting ears 101 in the same group to be positioned at the constricting guide hole 1121 after being gathered.

In order to further optimize the unlocking method of the lock and rationally use a limited number of pipes, in some embodiments, an interventional device release control mechanism is provided, which includes a first pipe 11 and an intermediate pipe 13 that are slid and nested in order from the inside to the outside. And the second tube 12, the distal end of the first tube 11 extends out of the middle tube 13, and the extended part is provided with a mounting head 112 for connecting interventional instruments, the middle tube 13 is connected with a flexible control part, the control part It has a holding state that binds the interventional instrument to the mounting head 112, and an open state that allows the interventional instrument to be completely separated from the mounting head 112;

A fixed base 15 and a slidable movable seat 16 are installed on the middle tube 13. The movable seat 16 is fixed with a lock 162 and an unlocking rod 163. The unlocking rod 163 penetrates the base 15 and penetrates the end of the base 15 as At the trigger end 1631, the base 15 is provided with a lock hole 1522 for receiving the lock 162;

The control member is sleeved on the lock member 162 in the holding state, and the end of the lock member 162 is inserted into the lock hole 1522. When the intermediate tube 13 moves distally relative to the first tube 11, the trigger end 1631 of the unlocking lever 163 It abuts against the mounting head 112 and drives the lock member 162 to move proximally out of the lock hole 1522, so that the control member enters an open state.

In the following embodiments, further improvements are made to the specific structure or cooperation relationship of the components in the release control mechanism. For example, the movable seat 16 includes:

The ring portion 161 is slidingly sleeved on the middle tube 13 and located on the proximal side of the base 15;

The lock 162 is rod-shaped and extends from the ring portion 161 to the distal end;

The unlocking lever 163 extends from the ring portion 161 to the distal end, and the extension length is longer than the lock piece 162.

The lock 162 and the unlocking rod 163 need to move in the axial direction and slidably fit with the corresponding through hole structure (for example, the avoiding hole 1511, the lock hole 1522, and the guide hole 1523), so they are generally rod-shaped and adapted to the hole diameter. Since the movable seat 16 needs to follow the movement of the base 15 when unlocking, at least one of the lock 162 and the unlocking lever 163 can be interference fit with the corresponding through hole structure. However, the degree of interference is not easy to be too tight to avoid hindering unlocking.

The length of the unlocking rod 163 is longer than the lock 162, then the unlocking rod 163 first abuts against the mounting head 112 during movement. When the middle tube 13 (together with the base) further moves to the distal end, the unlocking rod 163 is blocked, and the lock 162 will be relatively centered. The pipe 13 moves to realize unlocking.

In one embodiment, the locking member 162 and the unlocking rod 163 are arranged alternately and spaced along the circumferential direction of the ring portion 161, so that the force can be reasonably distributed. For example, there are two locking members 162 and the unlocking rod 163 respectively, and are alternately arranged at a uniform interval.

The control member in each embodiment is the lashing line 18;

In the holding state, the lashing wire 18 is directly or indirectly passed through the interventional device, and both ends of the lashing wire 18 are relatively fixed to the lock 162;

In the open state, at least one end of the binding wire 18 and the lock 162 are separated from each other to release the restraint on the interventional instrument.

In order to realize the relative fixation of the two ends of the binding wire 18 with the lock 162, in one embodiment, one end of the binding wire 18 is provided with a fixed wire loop 181, and the other end is provided with a movable wire loop 182;

In the holding state, the fixed wire loop 181 is sleeved on the unlocking lever 163, and the movable wire loop 182 is sleeved on the lock 162;

In the open state, the fixed wire loop 181 is sleeved on the unlocking lever 163, and the movable wire loop 182 is separated from the lock 162.

The fixed wire loop 181 and the movable wire loop 182 are in relation to the base 15 or the movable seat 16. The movable wire loop 182 needs to switch the state of the control member, so the cooperation relationship with the lock member 162 can be changed. It is equivalent to changing the matching relationship with the base 15 or the movable seat 16, and the fixing wire loop 181 does not need to change the matching relationship, that is, it is always relatively fixed, so that the binding wire can be withdrawn from the body after the operation.

In this embodiment, the fixed wire loop 181 is always sleeved or tied to the unlocking lever 163 of the movable seat 16, and the movable wire loop 182 can change the relationship with the lock member 162, which also makes the control member switch between the holding state and the open state .

In the holding state, the fixed wire loop 181 and the movable wire loop 182 are both connected to the movable seat 16, and the central part of the lashing wire 18 is directly or indirectly wound around the interventional device, which can more effectively distribute the stroke of each component and improve the control efficiency.

In other embodiments, the fixed wire loop 181 may not be used, and other methods may be used to be relatively fixed to the base 15 or the movable seat 16, for example, the base 15 or the movable seat 16 is perforated, and one end of the lashing wire 18 is fixed in the hole. Or although the fixed wire loop 181 is used, it is not sleeved on the unlocking lever 163, but connected to other parts of the base 15 or the movable seat 16, as long as they are not separated from each other.

In other embodiments, one end of the binding wire 18 is fixed to the mounting head 112, and the other end is provided with a movable wire loop 182;

In the holding state, the movable wire loop 182 is sleeved on the lock 162;

In the open state, the movable wire loop 182 is separated from the lock 162.

The end fixed to the mounting head 112 can be pulled out of the body by pulling the lashing wire as a whole after the operation.

When a suitable material is used for the lashing wire, it can even be left in the body after the operation. In other embodiments, one end of the lashing wire 18 is fixed with the interventional instrument, and the other end is provided with a movable wire loop 182;

In the holding state, the movable wire loop 182 is sleeved on the lock 162;

In the open state, the movable wire loop 182 is separated from the lock 162.

After the operation, after the various tubes of the delivery system are withdrawn from the body, the lashing line will stay in the body because one end is fixed with the interventional instrument.

The wire loops can be formed by forming a loop near the end of the thread, or winding in a reciprocating manner, that is, not partially forming a loop. For example, the binding wire is formed into a ring shape and is sleeved on the unlocking lever 163 and the lock 162 at the same time. , It is roughly the same when it is connected to the mounting head 112 or the interventional device.

The base 15 is fixedly arranged on the intermediate tube 13, and the base 15 provides a lock hole 1522 that cooperates with the lock member 162. When the movable seat 16 and the base 15 move relative to each other, the lock member 162 and the lock hole 1522 switch the cooperation relationship, and the lock member When the 162 is inserted into the lock hole 1522, the fixing wire loop 181 cannot be disengaged, and when the lock member 162 comes out of the lock hole 1522, the fixing wire loop 181 is allowed to escape from the lock member 162.

In one embodiment, in order to guide the relative movement between the movable seat 16 and the base 15, the base 15 is provided with a guide hole 1523 for the unlocking rod 163 to penetrate. In an open state, at least a part of the unlocking rod 163 is kept in the guide Inside the hole 1523.

Regarding the specific structure of the base, in one embodiment, the base 15 has an axial channel, and the distal end of the intermediate tube 13 is inserted and fixed to the axial channel. Specifically, the base 15 includes:

The proximal plate 151 is provided with an escape hole 1511 through which the lock member 162 and the unlocking rod 163 respectively pass;

The distal end plate 152 is provided with a lock hole 1522 matched with the lock member 162 and a guide hole 1523 through which the unlocking rod 163 penetrates;

The transition section 153 is fixedly connected between the proximal disc and the distal disc.

The periphery of the transition section 153 is a mating area that is radially inwardly retracted relative to the proximal disc 151 and the distal disc 152. In the holding state, the connecting parts of the lashing wire 18, the lock 162 and the unlocking rod 163 are all located in the mating area. The radially inwardly contracted mating area can accommodate the loops or knots of the lashing wire 18, so as to avoid occupying the outer peripheral space of the proximal disk 151 and the distal disk 152 in the radial direction, which is more convenient for loading.

In the open state, the lock member 162 exits the lock hole 1522 until the distal part of the lock member 162 is adjacent to the proximal disk 151. That is, the lock 162 is basically retracted into the corresponding escape hole 1511 to ensure that the movable wire loop 182 is unlocked.

The proximal disc 151 is provided with a receiving groove 1512 on the side facing the ring portion 161, and the proximal ends of the lock member 162 and the unlocking rod 163 are connected by the ring portion 161. In the holding state, the ring portion 161 is in the receiving slot 1512 , The escape hole 1511 is opened at the bottom of the accommodating groove 1512.

In order to prevent the lashing wire 18 from being scattered and to further regulate the extension path, in one embodiment, the outer periphery of the distal end plate 152 is provided with a wire passing groove 1521 for the lashing wire 18 to pass through. In a further preferred embodiment, the wire passing groove 1521 is opened on the outer periphery of the distal disk 152. It is more convenient for the extension and positioning of the lashing line 18, and the difficulty of threading is reduced. In some embodiments, a support sleeve 17 is fixed on the intermediate pipe 13, and the outer wall of the support sleeve 17 is close to the inner wall of the second pipe 12.

The support sleeve 17 can prevent the second tube 12 from overly tightening the movable seat 16 at a position adjacent to the movable seat 16, so as to avoid unnecessary movement of the movable seat 16 when the second tube 12 moves. In addition, the support sleeve 17 is also connected to the base 15 cooperates to restrict the movable seat 16, for example, the supporting sleeve 17 is located at the proximal end of the base 15 and arranged at intervals, and the sliding stroke of the movable seat 16 is limited between the supporting sleeve 17 and the base 15. When loading the interventional instrument, it is necessary to push the second tube 12 to the distal end. In order to make the distal side of the second tube 12 more smoothly sleeve the movable seat 16 and the support sleeve 17. In a preferred embodiment, the support sleeve 17 has a first guide surface 171 that gradually reduces in diameter from the distal end to the proximal end on the side facing the proximal end.

The distal end of the second tube 12 first contacts the first guide surface 171, and gradually self-centers and accommodates the support sleeve 17 under the action of the first guide surface 171. After passing the support sleeve 17, it is easier to further receive the movable seat 16 and Base 15.

In order to save axial space, in one embodiment, the support sleeve 17 has a second guide surface 172 whose diameter is gradually reduced from the proximal end to the distal end on the side facing the distal end, and the movable seat 16 moves proximally to the extreme position. The time collides with the second guide surface 172.

With respect to the base 15, when the movable seat 16 moves proximally, the annular portion 161 is gradually sheathed on the second guide surface 172. The function of the first guide surface 171 is similar to that of the former. Under the action of the second guide surface 172, the annular portion On the one hand, the 161 self-adaptive centering, and when the annular portion 161 can move along the second guide surface 172, the stroke is further increased to ensure the unlocking effect.

Of course, when combining the aforementioned hydraulically driven control handles, in one embodiment, an interventional instrument delivery system is also provided, which includes a release control mechanism adopting the aforementioned structure, and a control handle that drives the release control mechanism, and releases each of the control mechanisms. The proximal end of the pipe fitting is connected to the control handle, and the relative movement of each pipe fitting is driven hydraulically at the control handle.

It can also be combined with all the foregoing embodiments. In one embodiment, an interventional device delivery system is provided, including a release control mechanism, and a control handle for driving the release control mechanism, and the proximal ends of each tube in the release control mechanism are connected to the control handle , The relative movement of various pipe fittings is driven hydraulically at the control handle;

The interventional instrument is loaded into the release control mechanism. The release control mechanism includes a first tube 11, an intermediate tube 13 and a second tube 12 that are slidably nested and fitted from the inside to the outside. The distal end of the first tube 11 extends out of the middle tube 13, and And a mounting head 112 for connecting interventional instruments is provided on the extended part,

The middle tube 13 is connected with a flexible control part and a lock 162 that cooperates with the control part. The proximal end of the interventional instrument is bound to the mounting head 112 by the control part in a compressed state, and the interventional instrument is wrapped by the second tube 12;

When the interventional device is released:

Relative to the first tube 11, slide the second tube 12 proximally until the interventional device is completely exposed;

Relative to the first tube 11, sliding the intermediate tube 13 to the distal end, so that the control member follows the distal end and allows the proximal end of the interventional instrument to gradually move away from the mounting head 112;

The locking member 162 is driven to move to release the control member, so that the interventional instrument is separated from the mounting head 112 and completely released.

With reference to Figures 15a-17, using the above release control mechanism and interventional device delivery system, in one embodiment, a method for releasing an interventional device is also provided, wherein the interventional device is loaded into the release control mechanism, and the release control mechanism includes the inside-out The first tube 11, the middle tube 13 and the second tube 12 are slid and nested in sequence, the distal end of the first tube 11 extends out of the middle tube 13, and the extended part is provided with a mounting head 112 for connecting interventional instruments , The middle tube 13 is installed with a lock 162 that cooperates with the control part, the proximal end of the interventional instrument is bound to the mounting head 112 by the control part in a compressed state, and the interventional instrument is wrapped by the second tube 12;

Release methods include:

Step S100, relative to the first tube 11, slide the second tube 12 proximally until the interventional instrument is completely exposed;

Step S200, relative to the first tube 11, sliding the intermediate tube 13 to the distal end, so that the control member follows the distal end and allows the proximal end of the interventional instrument to gradually move away from the mounting head 112;

In step S300, the lock member 162 is forced to move to release the control member, so that the interventional device is completely released.

The proximal end of the stent 10, that is, the connecting ears 101 are divided into two groups in a compressed state, each group is gathered and pulled and positioned in the constricting guide hole 1121 of the mounting head 112, and each connecting ear 101 is wrapped with an annular wire sleeve 19;

There are two binding wires 18, each binding wire 18 has a fixed wire loop 181 at one end, and a movable wire loop 182 at the other end. The threading method is:

One end of the fixed wire loop 181 is sleeved on the unlocking lever 163, and the other end extends to the constriction guide hole 1121 through the wire groove 1521, and is wound with the loop wire sleeve 19 and then returns to the proximal end. When returning to the proximal end, it still passes through the same After passing through the wire slot 1521, after returning, it is sleeved on the lock 162 through the movable wire loop 182, and the middle part of the lashing wire 18 is hung on the loop wire sleeve 19 to realize mutual pulling. According to the length of the loop wire sleeve 19, the lashing wire 18 and the loop wire sleeve 19 The position of mutual entanglement can be inside the constriction guide hole 1121, or on the proximal side outside the constriction guide hole 1121;

The looped wire sleeve 19 is stretched to the proximal end through the constriction guide hole 1121 after being pulled, and simultaneously drives the two sets of connecting ears to constrict and converge respectively. At this time, the lock 162 is inserted into the lock hole 1522, and the unlocking rod 163 is inserted into the guide hole 1523, thus binding Both ends of the wire 18 are locked, that is, in a holding state, and the ring portion 161 is just received in the accommodating groove 1512.

In other embodiments, the loop wire sleeve 19 is not provided, and the binding wire 18 is threaded as follows:

One end of the fixed wire loop 181 is sleeved on the unlocking lever 163, and the other end extends to the constriction guide hole 1121 through the wire slot 1521, and after entering the constriction guide hole 1121, it further extends to the distal end and passes through the connecting ears of the same group. After the connecting ear is threaded, it returns to the proximal end through the same constriction guide hole 1121, and when returning to the proximal end, it still passes through the same wire passing groove 1521, and after returning, it is sleeved on the lock 162 through the movable wire loop 182. The relative movement between the first pipe piece 11, the middle pipe piece 13 and the second pipe piece 12 can use the prior art or combine the control handles of the previous embodiments, for example, use the control handle at the proximal end and hydraulically drive the relative movement of each pipe. During the relative movement of various pipes, the pressure of the hydraulic drive circuit can also be detected in real time as an operation reference or warning.

For example, in step S100, the multi-way switching valve is adjusted to the corresponding gear, and the driving pump is operated to cause the piston to drive the second tube 12 to move proximally. During the movement, the stent 10 will gradually be exposed and expand radially outward. After the stent 10 is completely exposed to the second tube 12, since the connecting ear 101 is still pulled and restricted by the loop wire sleeve 19 at this time, only the distal part of the stent 10 is expanded and released, and the proximal end remains in a compressed state.

In step S200, when sliding the middle tube 13 to the distal end relative to the first tube 11, the lashing wire 18 gradually moves to the distal end to relax the pulling of the connecting ear 101, and the connecting ear 101 is gradually under the action of the elasticity of the stent 10 itself. The outward expansion separates from the converging guide hole 1121 and gradually moves away from the mounting head 112; because the lashing line 18 is always pulled, the speed and amplitude of the proximal expansion of the stent can be controlled. When the position or posture is improper and needs to be adjusted or recovered, it can be adjusted relative to The first tube 11 slides the middle tube 13 proximally, that is, the connecting ears are pulled by the binding wire 18 to re-contract and gather to the constricting guide hole 1121, and the second tube 12 is slid distally to re-contain the stent 10.

When the intermediate tube 13 is slid at the distal end, since the base 15 and the movable seat 16 are inserted into each other and are pulled by the lashing wire 18, sufficient frictional resistance is obtained between the base 15 and the movable seat 16 to make the movable seat 16 Traveling to the distal end, that is, the lock 162 is always kept in the lock hole 1522, and the unlocking rod 163 is also kept in the guide hole 1523 to prevent the movable loop 182 of the binding wire 18 from loosening.

In step S300, the way to drive the lock to move and release the control is to slide the intermediate tube 13 distally relative to the first tube 11 until the trigger end 1631 of the unlocking lever 163 abuts the proximal side of the mounting head 112;

When the middle tube 13 is further slid to the distal end, the unlocking lever 163 is blocked, and the movable seat 16 cannot follow and separates from the base 15 over the frictional resistance. The lock 162 gradually exits the lock hole 1522, and the lock 162 is gradually retracting to avoid The hole 1511 is also separated from the movable wire loop 182, so that the lashing line 18 is released until the movable seat 16 and the support sleeve 17, that is, reach the limit position, or the base 15 and the mounting head 112 abut, it can also be used as a limit travel limit the way.

Since the movable wire loop 182 disengages the lock member 162 and no longer binds the connecting ear 101, the bracket 10 can be completely released.

After the stent 10 is completely released, first slide the intermediate pipe 13 proximally relative to the first pipe 11 to separate the base 15 from the mounting head 112 to prevent the two from clamping the lashing line 18 to ensure that the stent is completely released, and then the first pipe 11 and the middle tube 13 are housed back into the second tube 12, and all the tubes are retracted to the proximal end synchronously.

Figures 18a to 18c further illustrate the structure and application scenarios of the vena cava valve. The vena cava is divided into the upper body vena cava 1300 and the lower body vena cava 1200, both of which are connected to the right atrium 1000, and the right atrium 1000 passes through the tricuspid valve It communicates with the right ventricle 1100. That is, this embodiment also discloses a vena cava valve replacement system in which a vena cava valve is implanted at the superior or inferior vena cava via the femoral vein, including the vena cava valve and the aforementioned interventional device delivery systems.

According to requirements, the vena cava valve can be placed in the upper body vena cava 1300 (near the right atrium 1000) or in the lower body vena cava 1200. In terms of its structure, the vena cava valve includes:

The stent 10 is a mesh cylinder structure with a blood flow channel inside, and the stent 10 has opposite inflow and outflow ends in the axial direction.

In order to facilitate positioning, it can also include:

The valve leaflet 102, the valve leaflet is connected in the blood flow channel of the stent, and can open or close the blood flow channel under the action of blood flow;

The expansion mask 103 is connected to the bracket 10 and surrounds the outer periphery of the outflow end. The expansion mask 103 has a flaring structure facing away from the inflow end.

The inflow end of the stent 10 is provided with a plurality of connecting ears 101, the connecting ears 101 can be pierced with a loop wire sleeve 19, and the end of the mask 103 and the outflow end of the stent 10 are respectively provided with a V-shaped part, the loop wire sleeve 19 or The lashing line 18 can also be threaded through each V-shaped part for release control according to the release or pulling direction.

The stent 10 includes in sequence along the blood flow direction:

The inflow section 106 is on the side of the inflow end;

The waist 105 is in the middle of the axial direction of the stent 10;

The outflow section 104 extends from the part where the expansion mask 103 is connected to the bracket 10 toward the outflow end side;

Of course, each part of the stent 10 has opposite inflow and outflow sides.

In some embodiments, not only the vena cava valve, but also an interventional device with a connecting ear or a similar structure can be threaded and connected to the ligating wire 18 in different ways when the loop wire sleeve 19 is provided.

In Figure 19a, there are two lashing wires 18, each of which has a fixed wire loop 181 at one end and a movable wire loop 182 at the other end. One of the lashing wires bypasses the connection point M1 to be pulled with the loop wire sleeve 19. The other lashing wire bypasses the connection point M2 to be pulled with the loop line sleeve 19, and the two connection points do not bisect the loop line sleeve 19, that is, the corresponding central angle is less than 180 degrees. Taking six connecting ears as an example, two are connected There are four on one side of the dotted line and two on the other side. In Figure 19b, there are four lashing lines 18, each of which has a fixed loop 181 at one end and a movable loop 182 at the other end. Each lashing line bypasses the corresponding connection point to be pulled with the loop line sleeve 19, namely There are four connection points.

In Figure 19c, there are two lashing wires 18, each of which has a fixed wire loop 181 at one end and a movable wire loop 182 at the other end. One of the lashing wires bypasses the connection point M1 to be pulled with the loop wire sleeve 19. The other lashing wire bypasses the connection point M2 to be pulled with the loop wire sleeve 19, and the two connection points bisect the loop wire sleeve 19, that is, the corresponding central angle is approximately equal to 180 degrees. Taking six connecting ears as an example, two connecting There are three on one side of the dotted line, and three on the other side.

In Figure 19d, there are three lashing lines 18, each of which has a fixed loop 181 at one end and a movable loop 182 at the other end. Each lashing line bypasses the corresponding connection point to be pulled with the loop line sleeve 19, namely There are three connection points.

In Figure 19c, the looped wire sleeve 19 is also connected with two spanning sections 191, and there are two binding wires 18, each of which has a fixed wire loop 181 at one end and a movable wire loop 182 at the other end, one of which is a binding wire It bypasses the connection point M1 to achieve traction with the cross section 191, and the other lashing wire bypasses the connection point M2 to achieve traction with the cross section 191. The lashing line 18 indirectly pulls the loop sleeve 19 through the cross section 191, and passes through the cross section 191. The span 191 can be more flexibly configured with force points to facilitate the grouping of the connecting ears and to adjust the turning point when the lashing line extends to the distal end, that is, the length of the lashing line 18 can also be flexibly adjusted.

Figures 19a to 19e mainly illustrate the combination of the lashing wire 18 and the looped wire sleeve 19, and the pulling direction of the lashing wire 18 is not limited. The direction of the lashing wire 18 in the figures is only for easy labeling and reading.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification. When the technical features of different embodiments are reflected in the same drawing, it can be regarded that the drawing also discloses the combination examples of the various embodiments involved.

The above-mentioned embodiments only express several implementation manners of the present application, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the protection scope of this application.

Claims

The interventional instrument release control mechanism includes a first tube, a middle tube, and a second tube that are slidably nested and fitted from the inside to the outside. The distal end of the first tube extends out of the middle tube and is on the extended part A mounting head for connecting interventional instruments is provided, and is characterized in that a flexible control member is connected to the intermediate tube, and the control member has:

In the holding state, in the holding state, the control member penetrates the mounting head and binds the interventional instrument to the mounting head;

The open state allows the interventional instrument to be completely separated from the mounting head;

The intermediate pipe is installed with a lock that cooperates with the control piece, and the lock is slidingly fitted with the intermediate pipe and switches different states of the control piece when sliding.
The interventional device release control mechanism according to claim 1, wherein the control member is a lashing wire, the proximal end of the interventional device is provided with a plurality of connecting ears, and in the holding state, the lashing wire directly passes through and pulls Pull each connecting ear;

Or a ring-shaped wire sleeve is inserted between the connecting ears, and in the holding state, the binding wire bypasses the ring-shaped wire sleeve and indirectly pulls the connecting ear through the ring-shaped wire sleeve.
The interventional device release control mechanism according to claim 2, wherein there are multiple binding wires, and the pulling positions of each binding wire and the loop wire sleeve are evenly distributed along the circumferential direction of the interventional device.
The interventional device release control mechanism according to claim 2, wherein a fixed base and a sliding movable seat are installed on the intermediate tube, and the movable seat is fixed with a lock and an unlocking rod, so The unlocking lever penetrates the base from the proximal end to the distal end, and one end that passes through the base serves as a trigger end, and the base is provided with a lock hole for receiving the lock;

The control member is sleeved on the lock member in the holding state, and the end of the lock member is inserted into the lock hole;

When the intermediate tube moves distally relative to the first tube, the trigger end of the unlocking lever abuts against the mounting head and drives the lock member to move proximally out of the lock hole, so that the control member enters Open state.
The interventional instrument release control mechanism of claim 4, wherein a support sleeve is fixed on the intermediate tube, and the support sleeve is located at the proximal end of the base and is arranged at intervals, and the sliding of the movable seat The stroke is limited between the support sleeve and the base.
The interventional device release control mechanism according to claim 5, wherein the outer wall of the support sleeve is close to the inner wall of the second tube.
The interventional instrument release control mechanism according to claim 5, wherein the support sleeve has a first guide surface that gradually reduces in diameter from the distal end to the proximal end on the side facing the proximal end of the support sleeve.
The interventional instrument release control mechanism according to claim 7, wherein the support sleeve is provided with a second guide surface that gradually reduces in diameter from the proximal end to the distal end on the side facing the distal end, and the movable seat is When the proximal end moves to the extreme position, it abuts against the second guide surface.
The interventional instrument release control mechanism according to claim 4, wherein the base has an axial channel, the distal part of the intermediate tube is inserted and fixed in the axial channel, and the base includes :

The proximal plate is provided with escape holes for the lock member and the unlocking rod to pass through respectively;

The distal end plate is provided with a lock hole matched with the lock piece and a guide hole for the unlocking rod to penetrate;

The transition section is fixedly connected between the proximal disk and the distal disk.
The interventional instrument release control mechanism according to claim 9, wherein the periphery of the transition section is a mating area that is radially retracted relative to the proximal disc and the distal disc. The connecting parts of the lashing line, the lock member and the unlocking lever are all located in the matching area.
The interventional instrument release control mechanism according to claim 1, wherein the mounting head is provided with a constriction guide hole, and the constriction guide hole allows the control member to pass through to connect the interventional instrument and maintain the state The proximal side of the interventional instrument is restricted to the constriction guide hole.
The interventional device release control mechanism according to claim 2, wherein, in the holding state, the lashing wire directly or indirectly passes through the interventional device, and both ends of the lashing wire are relatively fixed to the lock;

In the open state, at least one end of the binding wire and the lock are separated from each other to release the restraint on the interventional instrument.
An interventional device delivery system, characterized by comprising the interventional device release control mechanism according to any one of claims 1-12, and a control handle for driving the release control mechanism, and the proximal end of each tube in the release control mechanism is connected to the control handle , The relative movement of various pipe fittings is driven by hydraulic pressure at the control handle.
The method for releasing an interventional device is characterized in that the interventional device is loaded into a release control mechanism, and the release control mechanism includes a first tube, an intermediate tube, and a second tube that are nested and slidably fitted from the inside to the outside. The distal end of the pipe piece extends out of the intermediate pipe piece, and a mounting head for connecting interventional instruments is provided on the extended position, and the intermediate pipe piece is connected with a flexible control piece and a lock piece that cooperates with the control piece, The proximal end of the interventional instrument is bound to the mounting head by the control member in a compressed state, and the interventional instrument is wrapped by the second tube;

The release method includes:

Relative to the first tube, sliding the second tube proximally until the interventional instrument is completely exposed;

Relative to the first tube, sliding the intermediate tube distally to make the control member follow the distal end and allow the proximal end of the interventional instrument to gradually move away from the mounting head;

The lock member is driven to move to release the control member, so that the interventional device is completely released.
The method for releasing an interventional instrument according to claim 14, wherein a fixed base and a sliding movable seat are installed on the intermediate tube, and the movable seat is fixed with a lock and an unlocking rod, so The unlocking lever penetrates the base from the proximal end to the distal end, and one end that passes through the base serves as a trigger end, and the base is provided with a lock hole for receiving the lock;

The control member is sleeved on the lock member in the holding state, and the end of the lock member is inserted into the lock hole;

There is a tight fit between the base and the movable seat, and when the intermediate tube is slid distally relative to the first tube, the movable seat follows the base and causes the control member to follow the distal end.
The method for releasing an interventional instrument according to claim 15, wherein the way of driving the lock to move the control member is to slide the intermediate tube distally with respect to the first tube until the unlocking lever is triggered End against the mounting head;

Further slide the intermediate tube to the distal end, so that the unlocking lever drives the movable seat away from the base under the blocking of the mounting head, and drives the lock member to exit the lock hole, so that the control member is freed.
The method for releasing an interventional device according to claim 16, wherein a support sleeve is fixed on the intermediate tube, the outer wall of the support sleeve is close to the inner wall of the second tube, and the support sleeve is located at The proximal end of the base is arranged at intervals, and when the intermediate tube is further slid to the distal end, until the movable seat abuts against the support sleeve, or until the base abuts against the mounting head.
The method for releasing an interventional device according to claim 17, wherein after the interventional device is completely released, the release control mechanism is retracted proximally;

When retracting the release control mechanism to the proximal end, first slide the intermediate tube proximally relative to the first tube to separate the base from the mounting head;

Then, the first pipe and the intermediate pipe are housed back into the second pipe, and all pipes are retracted to the proximal end synchronously.
The method for releasing an interventional device according to claim 16, wherein before releasing the control member, the adjustment of the interventional device is further performed, comprising:

Relative to the first tube, sliding the intermediate tube proximally to make the control member pull the interventional instrument until the proximal end of the interventional instrument is constricted;

Relative to the first tube, the second tube is slid distally, so that at least a part of the interventional instrument is received in the second tube. 20. The method for releasing an interventional device according to claim 14, wherein a control handle is used at the proximal end to hydraulically drive the relative movement of each tube;

The control handle is provided with a first cylinder and a second cylinder that are sequentially butted along the axial direction, wherein a first piston is slidably installed in the first cylinder, and a second piston is slidably installed in the second cylinder;

All the pipes enter from the distal end of the first cylinder. The first pipe is fixed to the first piston. After the intermediate pipe extends out of the first piston, it enters the second cylinder through the isolation seal and is connected to the second cylinder. The second piston is fixed, and the first tube is fixed to the proximal end of the second cylinder after extending out of the second piston;

The control handle is also provided with a hydraulic drive circuit for driving the relative movement of each pipe through the piston.
The method for releasing an interventional device according to claim 15, wherein the control member is a lashing wire;

Before release, the lashing wire is directly or indirectly passed through the interventional device, and both ends of the lashing wire are relatively fixed to the lock;

After being released, at least one end of the binding wire is separated from the lock member to release the restraint on the interventional instrument. 22. The method for releasing an interventional device according to claim 21, wherein one end of the binding wire is provided with a fixed wire loop, and the other end is provided with a movable wire loop; and the fixed wire loop is sleeved on the unlocking wire. Rod, the movable wire loop is sleeved on the lock piece;

Or, one end of the binding wire is fixed with the base or the mounting head, and the other end is a movable wire loop, which is sleeved on the lock piece.
The method for releasing an interventional device according to claim 21, wherein a guide hole is provided on the mounting head, and the guide hole is used for the lashing wire to pass through to connect the interventional device.
The method for releasing an interventional device according to claim 14, wherein the interventional device is a vena cava valve.
The method for releasing an interventional device according to claim 14, wherein the proximal end of the interventional device is provided with an annular wire sleeve that is matched with the control member.