WO2021083295A1

WO2021083295A1 - Interventional device delivery system driven by means of hydraulic mode

Info

Publication number: WO2021083295A1
Application number: PCT/CN2020/124964
Authority: WO
Inventors: 雷荣军; 王翔; 王媛茹; 郭烽; 黄杭栋; 陈锐
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: CN220344551U; CN114667118A; CN215960481U; CN220424025U; CN112741945B; CN114727873A; WO2021083294A1; CN215192642U; CN112741712B; CN215228888U; CN112741712A; CN220344550U; CN220344552U; CN112741945A

Abstract

An interventional device delivery system driven by means of a hydraulic mode. The system comprises multiple pipes (1) provided coaxially from inside to outside, and a control handle (2) for driving the multiple pipes (1) to move relatively. The distal ends of the pipes (1) are used for matching each other to operate an interventional device, and the proximal ends of the pipes (1) are connected to the control handle (2); the pipes (1) are driven, by means of the hydraulic mode at the control handle (2), to move relatively. The control handle (2) is provided with one or more hydraulic cavities, and a piston is separately slidably mounted in each of the hydraulic cavities; a hydraulic driving circuit for driving, by means of the pistons, the pipes (1) to move relatively is further provided at the control handle (2). The hydraulic driving circuit comprises: a hydraulic pipeline (33) for providing a liquid channel communicated with the hydraulic cavities; a driving pump (5), communicated with the hydraulic pipeline (33) and used for driving a liquid to flow; and a control valve, communicated with the hydraulic pipeline (33) and used for controlling a flow direction of the liquid. The hydraulically driven interventional device delivery system uses a hydraulic drive mode, and is convenient and swift in use, and different functions can further be switched by means of the hydraulic driving circuit.

Description

Interventional instrument delivery system driven by hydraulic pressure

Technical field

This application relates to the field of medical devices, in particular to a delivery system for delivering interventional devices into the body.

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 methods. With the development of interventional devices, more requirements are put forward for the functions of interventional devices. For example, the delivery system must realize the functions of valve release, retrievability, and bending. The functional modules are usually realized by independent drive modules, which makes the control handle transmission relatively complicated, and the overall size is large, which is not conducive to the operation of the operation.

Summary of the invention

Aiming at the existing interventional instrument delivery system, the present invention further improves the driving mode and is more convenient to operate.

A delivery system for interventional instruments driven by hydraulic means, comprising a plurality of pipe fittings coaxially arranged from the inside to the outside, and a control handle for driving the relative movement of the plurality of pipe fittings, and the distal ends of the pipe fittings are used for mutual cooperation operation and intervention Apparatus, the proximal end of each pipe fitting is connected to the control handle, and the relative movement of each pipe fitting is driven hydraulically at the control handle;

The control handle is provided with one or more hydraulic chambers, and pistons are slidably installed in each hydraulic chamber, and a hydraulic drive circuit for driving the relative movement of various pipes through the pistons is also arranged at the control handle. The 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.

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 two radially adjacent pipes include an outer pipe and an inner pipe. The outer pipe enters one of the hydraulic chambers and is fixed with the piston in the hydraulic chamber, and the inner pipe extends to connect to the pistons of the other hydraulic chambers. Or fixed to the control handle.

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

Optionally, the liquid storage tank is provided with a liquid injection port.

Optionally, a liquid injection joint is installed on the control handle, and the liquid injection joint is connected to the liquid injection port through the drive pump for filling liquid into the liquid storage tank.

Optionally, the liquid in the hydraulic drive circuit is physiological saline.

Optionally, 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 first cylinder barrel is installed in the control handle, and the inside of the first cylinder barrel is a first hydraulic chamber, and two of the working side ports of the multi-way switching valve are communicated with the first hydraulic chamber.

Optionally, a first piston is slidably installed in the first hydraulic chamber, and the first piston divides the first hydraulic chamber into a first chamber and a second chamber, and the first chamber and the second chamber pass The corresponding communication port is connected to the hydraulic drive circuit.

Optionally, the setting of the multi-port switching valve is one of the following forms:

(a) The multi-port switching valve has four ports in total, two of which are drive-side ports, which are connected to the inlet and outlet of the drive pump respectively. The other two ports of the multi-port switching valve are working-side ports. The multi-port switching valve passes through Multiple flow passages on the spool connect the corresponding drive-side interface with the working-side interface. The multiple pipes include a first pipe and a second pipe arranged in sequence from the inside to the outside. Based on different communication relationships, they can be divided into D1~ D2 gear, the functions realized by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

(b) The multi-port switching valve has four ports in total, two of which are drive-side ports, which are connected to the inlet and outlet of the drive pump respectively. The other two ports of the multi-port switching valve are working-side ports. The multi-port switching valve passes through Multiple flow passages on the spool connect the corresponding drive-side interface with the working-side interface. The multiple pipes include a first pipe and a second pipe arranged in sequence from the inside to the outside. Based on different communication relationships, they can be divided into D1~ D3 gear, the functions realized by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: Exhaust the gap between the second pipe and the first pipe

(b) The multi-port switching valve has five ports in total, two of which are drive-side ports, which are respectively connected to the inlet and outlet of the drive pump. The other three ports are the working-side ports. The multi-port switching valve passes through the valve. The multiple flow passages on the core connect the corresponding drive-side interface and the working-side interface. The multiple pipes include a first pipe and a second pipe arranged in order from the inside to the outside. The second pipe is also sheathed with a protective tube, Based on different connectivity relationships, it can be divided into D1～D4 gears. The functions implemented by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: Exhaust the gap between the second pipe and the first pipe

D4: The gap between the protective pipe and the second pipe is exhausted.

Optionally, a first cylinder tube and a second cylinder tube are installed in the control handle, the inside of the first cylinder tube is a first hydraulic chamber, and the inside of the second cylinder tube is a second hydraulic chamber. Two working-side interfaces are connected with the first hydraulic chamber, and the other two working-side interfaces are connected with the second hydraulic chamber.

Optionally, a first piston is slidably installed in the first hydraulic chamber, and a second piston is slidably installed in the second hydraulic chamber. The first piston divides the first hydraulic chamber into a first chamber and a second chamber. The second piston divides the second hydraulic chamber into a third chamber and a fourth chamber, and each chamber is connected to the hydraulic drive circuit through a corresponding communication port.

(a) The multi-port switching valve has six ports in total, two of which are drive-side ports, which are connected to the inlet and outlet of the driving pump respectively. The other four ports of the multi-port switching valve are working-side ports. The multi-port switching valve passes through The multiple flow passages on the spool connect the corresponding drive-side interface and the working-side interface. The multiple pipes include a first pipe, an intermediate pipe and a second pipe arranged in sequence from the inside out, which can be divided based on different communication relationships. For D1～D4 gears, the functions realized by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: The second piston moves to the distal end

D4: The second piston moves proximally

(b) The multi-port switching valve has six ports in total, two of which are drive-side ports, which are respectively connected to the inlet and outlet of the drive pump. The other four ports of the multi-port switching valve are working-side ports. The multiple flow passages on the spool connect the corresponding drive-side interface and the working-side interface. The multiple pipes include a first pipe, an intermediate pipe and a second pipe arranged in sequence from the inside out, which can be divided based on different communication relationships. For D1～D6 gear positions, the functions realized by each gear position are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: The second piston moves to the distal end

D4: The second piston moves proximally

D5: Exhaust the gap between the middle pipe and the first pipe

D6: Exhaust the gap between the second pipe and the middle pipe

(c) The multi-port switching valve has seven ports in total, two of which are drive-side ports, which are respectively connected to the inlet and outlet of the drive pump. The other five ports of the multi-port switching valve are working-side ports. The multi-port switching valve passes through Multiple flow passages on the spool connect the corresponding drive-side interface with the working-side interface. The multiple pipes include a first pipe, an intermediate pipe and a second pipe arranged in sequence from the inside out. The second pipe is also sleeved outside There is a protection tube, which can be divided into D1～D7 gears based on different connections. The functions implemented by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: The second piston moves to the distal end

D4: The second piston moves proximally

D5: Exhaust the gap between the middle pipe and the first pipe

D6: Exhaust the gap between the second pipe and the middle pipe

D7: The gap between the protective pipe and the second pipe is exhausted.

Optionally, the control handle is provided with one or more hydraulic chambers, a piston is slidably installed in each hydraulic chamber, and two radially adjacent pipes among the multiple pipes correspond to one of the hydraulic chambers;

Optionally, each piston includes:

The fixed sealing part is sleeved on the outer pipe fitting and fixedly and sealingly cooperates with the outer wall of the outer pipe fitting;

The sliding seal part is sleeved on the inner pipe fitting and slidingly and sealingly fits with the outer wall of the inner pipe fitting;

The fixed sealing part and the sliding sealing part are fixedly connected, and at least one of them is sliding and sealingly fitted with the inner wall of the hydraulic chamber where it is located. Optionally, the radial gap between the two pipes adjacent to each other in the radial direction is an exhaust gap, and the control handle is also provided with a hydraulic drive circuit for driving the relative movement of each pipe through the piston, and the hydraulic drive The circuit also communicates with the exhaust gap for exhausting.

Optionally, the piston is provided with a balance hole, and a balance valve core is installed at the position of the balance hole; the piston is also provided with an exhaust hole communicating with an exhaust gap, and the exhaust hole is located at Between the fixed sealing part and the sliding sealing part;

The piston divides the hydraulic pressure chamber in which it is located into two chambers. When the pressure in the two chambers approaches, the balance valve core opens to connect the two chambers and the exhaust hole.

Optionally, the multiple pipes include a first pipe and a second pipe that are nested slidably from the inside to the outside. The distal end of the first pipe is used for placing interventional instruments. When the two pipes move relative to each other, the The distal end of the second tube wraps or releases the interventional instrument.

Optionally, the plurality of pipes include a first pipe, an intermediate pipe, and a second pipe arranged in sequence from the inside out, the distal end of the first pipe is used for placing interventional instruments, and the distal end of the intermediate pipe It is fixedly connected to the first tube for traction and bending, or the distal end of the intermediate tube is provided with a lock that restricts the interventional instrument to the first tube, and the distal end of the second tube is used for wrapping or Release the interventional instrument; the hydraulic chamber is a first hydraulic chamber and a second hydraulic chamber; the piston is a first piston slidably installed in the first hydraulic chamber and a first piston slidably installed in the second hydraulic chamber Two pistons.

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

Optionally, the hydraulic chamber is a first hydraulic chamber; the piston is a first piston slidably mounted in the first hydraulic chamber, and the proximal end of the second tube penetrates into the first hydraulic chamber and It is fixedly connected with the first piston, and the proximal end of the first pipe member passes through the first piston through the second pipe member and further extends until it is fixedly connected with the control handle.

Optionally, the first piston divides the first hydraulic chamber into a first chamber and a second chamber, and each chamber is connected to a hydraulic drive circuit through a corresponding communication port. The proximal end of the second pipe is Penetrates into the first chamber and is fixedly connected with the first piston, the proximal end of the first tube passes through the first piston through the second tube, and then extends out of the second chamber The first hydraulic chamber.

Optionally, the hydraulic drive circuit is configured on the control handle and is used to drive the first piston to move relative pipes.

Optionally, the first hydraulic chamber is directly opened inside the control handle, or the control handle is fixedly installed with a first cylinder, and the inside of the first cylinder is the first hydraulic chamber.

Optionally, the control handle surrounds the first cylinder barrel, and a positioning component that cooperates with the first cylinder barrel is provided on the control handle.

Optionally, the control handle includes a working part for providing the first hydraulic chamber and a holding part connected with the working part, the working part has opposite distal and proximal ends, and the second A tube extends from the distal end of the working part into the first hydraulic chamber, and the first tube extends and is connected to the proximal end of the working part.

Optionally, the holding part is connected to the proximal end of the working part.

Optionally, a pipeline joint is installed at the proximal end of the working part, and the first tube extends and is connected to the pipeline joint.

Optionally, the drive pump includes:

A pump housing fixed to 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 control handle and linked with the working part.

Optionally, the driving part is an electric part, a pneumatic part or a manual part.

Optionally, the manual piece slides or rotates and is installed on the operating button of the control handle.

Optionally, the working member is a plunger, and the driving member directly presses against the plunger or is linked with the plunger through a transmission mechanism.

Optionally, the driving pump further includes a resetting member, and the resetting member acts between the driving member and the control handle.

Optionally, the control handle includes a working part for providing the hydraulic chamber and a holding part connected to the working part, and the operating button is installed on the holding part.

Optionally, the drive pump is located outside the control handle.

Optionally, the drive pump and/or the liquid storage tank are located outside the control handle.

Optionally, the first piston includes:

A fixed sealing part, sleeved on the second pipe fitting and fixedly and sealingly fitted with the outer wall of the second pipe fitting;

A sliding seal part sleeved on the first pipe fitting and slidingly and sealingly fitted with the outer wall of the first pipe fitting;

The fixed sealing part and the sliding sealing part are fixedly connected, and at least one of them is slidingly and sealingly fitted with the inner wall of the first hydraulic chamber.

Optionally, both the fixed sealing part and the sliding sealing part are in sliding and sealing fit with the inner wall of the first hydraulic chamber;

The fixed sealing part and the sliding sealing part are fixed to each other through a connecting sleeve.

Optionally, the radial gap between the second pipe and the first pipe is an exhaust gap, and the side wall of the connecting sleeve is provided with an exhaust hole communicating with the exhaust gap.

Optionally, an air gap communicating with the exhaust hole is left between the outer wall of the connecting sleeve and the inner wall of the first hydraulic chamber, and the axial position of the air gap is at the fixed sealing portion And the sliding seal part;

The first piston divides the first hydraulic chamber into a first chamber and a second chamber, wherein the fixed sealing part faces the first chamber, and the sliding sealing part faces the second chamber;

The fixed sealing part and the sliding sealing part are respectively provided with through holes, and a balance valve core is installed at the through holes. When the pressure in the first chamber and the second chamber approaches, the balance valve core opens to make the first The first chamber, the second chamber and the air gap are connected.

Optionally, both the fixed sealing portion and the sliding sealing portion include a support frame and a sealing sleeve that wraps and wraps the outside of the support frame, and the connecting sleeve is fixed between the two support frames.

Optionally, each support frame and the sealing sleeve are provided with a through hole for the first pipe or the second pipe to pass through, and the passing part is sealed and fitted, and the outer circumference of each sealing sleeve is connected to the first hydraulic pressure The inner wall of the cavity is sliding and sealingly fitted.

Optionally, the proximal end of the second pipe piece passes through the connecting sleeve and is fixed to the support frame in the sliding seal portion, and the pipe wall of the second pipe piece is provided with a position matching the vent hole Adapt to the vent.

Optionally, the proximal end of the second tube is fixed to a support frame in the fixed sealing portion.

Optionally, an intermediate pipe is also coupled between the first pipe and the second pipe, a second hydraulic chamber communicating with the hydraulic drive circuit is provided inside the control handle, and the second hydraulic There is a second piston in the cavity;

After the proximal end of the intermediate tube passes through the first piston through the second tube, it further extends into the second hydraulic chamber and is fixedly connected to the second piston;

The proximal end of the first pipe member passes through the second piston through the intermediate pipe member and then further extends until it is fixedly connected with the control handle;

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 is provided with a lock that restricts the interventional instrument to the first pipe.

The middle pipe can be used as an adjustable bend pipe;

The middle pipe can also be used as a cable pipe;

Only one multi-port switching valve and drive pump can control different hydraulic chambers, which simplifies the system structure.

Optionally, the second piston divides the second hydraulic chamber into a third chamber and a fourth chamber, and each chamber is connected to the hydraulic drive circuit through a corresponding communication port. The end penetrates into the third chamber and is fixedly connected to the second piston. The proximal end of the first tube passes through the second piston through the intermediate tube, and then extends out of the fourth chamber. The second hydraulic chamber.

Optionally, the second hydraulic chamber is directly opened inside the control handle, or the control handle is fixedly installed with a second cylinder, and the inside of the second cylinder is the second hydraulic chamber.

Optionally, the control handle surrounds the second cylinder barrel, and a positioning component that cooperates with the second cylinder barrel is provided on the control handle.

Optionally, the control handle is fixedly installed with a first cylinder, and the inside of the first cylinder is the first hydraulic chamber;

The control handle is fixedly installed with a second cylinder, and the inside of the second cylinder is the second hydraulic chamber;

The first cylinder barrel and the second cylinder barrel are arranged coaxially in sequence from the distal end to the proximal end.

Optionally, the first cylinder barrel and the second cylinder barrel are butted with each other, and an isolation seal is provided at the docking position, and a passage that allows the intermediate tube to seal and slide through is provided on the isolation seal. hole.

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 lines, used to provide liquid channels;

The multi-port switching valve has a drive side interface communicating with the inlet and outlet of the drive pump, and a plurality of working side interfaces, of which two working side interfaces are connected to the first hydraulic chamber, and the other two working sides The interface communicates with the second hydraulic chamber;

The multi-way switching valve has a plurality of gear positions, and is used to switch the communication relationship between the driving side interface and different working side interfaces to control the flow direction of the liquid.

Optionally, the first piston includes:

A sliding seal part sleeved on the first pipe fitting and slidingly and sealingly fitted with the outer wall of the intermediate pipe fitting;

The second piston includes:

The fixed sealing part is sleeved on the intermediate pipe fitting and fixedly and sealingly cooperates with the outer wall of the intermediate pipe fitting;

In the same piston, the fixed sealing part and the sliding sealing part are fixedly connected, and at least one of them is sliding and sealingly fitted with the inner wall of the hydraulic chamber.

Optionally, in the same piston, both the fixed sealing part and the sliding sealing part are in sliding and sealing fit with the inner wall of the hydraulic chamber where they are located; the fixed sealing part and the sliding sealing part are fixed to each other through a connecting sleeve.

Optionally, the radial gap between the second pipe and the intermediate pipe is a first exhaust gap, and the side wall of the connecting sleeve in the first piston is provided with a first exhaust that communicates with the first exhaust gap. hole;

The radial gap between the intermediate pipe and the first pipe is a second exhaust gap, and the side wall of the connecting sleeve in the second piston is provided with a second exhaust hole communicating with the second exhaust gap.

Optionally, between the outer wall of the connecting sleeve in the first piston and the inner wall of the first hydraulic chamber is left with a first air gap communicating with the first exhaust hole, and the first air gap is located at an axial position Between the fixed sealing part and the sliding sealing part of the first piston;

The first piston divides the first hydraulic chamber into a first chamber and a second chamber, the fixed sealing part of the first piston faces the first chamber, and the sliding sealing part of the first piston faces the second chamber;

The fixed sealing part and the sliding sealing part of the first piston are respectively provided with a balance hole, and a balance valve core is installed at the balance hole. When the pressure in the first chamber and the second chamber approaches, the balance valve core opens to make the first The first chamber, the second chamber and the first air gap are in communication.

Optionally, in the same piston, both the fixed sealing part and the sliding sealing part include a support frame and a sealing sleeve covering and outside the support frame, and the connecting sleeve is fixed between the two support frames.

Optionally, each support frame and the sealing sleeve are provided with a through hole for the first pipe, the intermediate pipe or the first pipe to pass through, and the passing part is sealed and fitted, and the outer circumference of each sealing sleeve is The inner wall of the hydraulic chamber is fitted with a sliding seal.

Optionally, the proximal end of the second pipe member passes through the connecting sleeve of the first piston and is fixed to the support frame in the sliding seal portion of the first piston. The position of the exhaust hole is matched to adapt to the exhaust hole.

Optionally, the proximal end of the second tube is fixed to a support frame in the fixed sealing portion of the first piston.

Optionally, a second air gap communicating with the second exhaust hole is left between the outer wall of the connecting sleeve in the second piston and the inner wall of the second hydraulic chamber, and the second air gap is located at an axial position Between the fixed sealing part and the sliding sealing part of the second piston;

The second piston divides the second hydraulic chamber into a third chamber and a fourth chamber, the fixed sealing part of the second piston faces the third chamber, and the sliding sealing part of the second piston faces the fourth chamber;

The fixed sealing part and the sliding sealing part of the second piston are respectively provided with a balance hole, and a balance valve core is installed at the balance hole. When the pressure in the third chamber and the fourth chamber approaches, the balance valve core opens to make the first The three chambers, the fourth chamber and the second air gap are connected.

Optionally, the proximal end of the intermediate tube passes through the connecting sleeve of the second piston and is fixed to the support frame in the sliding seal portion of the second piston, and the tube wall of the intermediate tube is provided with the second exhaust The hole position is matched to adapt to the exhaust hole.

Optionally, the proximal end of the intermediate tube is fixed to a support frame in the fixed sealing portion of the second piston.

Optionally, the balance hole is opened on the sealing sleeve, and the support frame is provided with an escape groove for the balance valve core to penetrate.

Optionally, the support frame includes:

An annular portion opposite to the axial end of the connecting sleeve;

A support plate fixed on the outer circumference of the ring portion, and the sealing sleeve is wrapped around the support plate.

Optionally, the support disk is a circular disk with a frame structure.

Optionally, the balance valve core includes:

The linkage rod slides through the balance holes on the fixed seal part and the sliding seal part, and has a clearance fit at the penetrating part;

Two sealing heads are respectively fixed on the two ends of the linkage rod, and correspondingly close or open the balance hole under the action of the pressure on both sides of the piston.

Optionally, the sealing head has a spherical shape, and the opposite sides of the fixed sealing part and the sliding sealing part are respectively provided with a recessed area on the periphery of the balance hole, and the sealing head abuts against the balance hole when the balance hole is closed.述 Depression area.

Optionally, a protective tube is sleeved on the outside of the second tube, and the proximal end of the protective tube is fixed to the control handle.

Optionally, a fixing sleeve is installed on the control handle, the proximal end of the protective tube is in a sealed connection with the distal end of the fixing sleeve, and the proximal end of the second tube passes through the fixing sleeve through the protective tube. The sleeve further extends into the first hydraulic chamber.

Optionally, the proximal end of the fixed sleeve is in sliding and sealing fit with the outer wall of the second tube, the radial gap between the protective tube and the second tube is a third exhaust gap, and the side of the fixed sleeve The wall is provided with a third exhaust hole communicating with the third exhaust gap.

Optionally, the third exhaust hole is connected to the hydraulic drive circuit.

Optionally, the hydraulic drive circuit includes:

Hydraulic lines, used to provide liquid channels;

The multi-port switching valve has a drive side interface communicating with the inlet and outlet of the drive pump, and a plurality of working side interfaces, of which two working side interfaces are connected to the first hydraulic chamber, and there is a working side The interface communicates with the third exhaust hole;

Optionally, the first tube is provided with a mounting head for connecting the interventional instrument, the mounting head is provided with a lock hole, the distal end of the intermediate tube is fixed with a lock, and the lock is in a locked state The interventional instrument itself is inserted into the lock hole or tied to the lock by a traction cable, and the lock is detached from the lock hole in the unlocked state to release the interventional instrument.

Optionally, the lock is rod-shaped, a connecting seat is fixed inside the middle tube, the proximal end of the lock is inserted and fixed to the connecting seat, and the distal end of the lock passes through the middle tube. The axial movement of the lock hole cooperates with each other.

Optionally, the lock member is a plurality of straight rods arranged side by side.

The hydraulically driven interventional instrument delivery system of the present application adopts a hydraulic drive mode, which is convenient and quick to use, and can also switch different functions through a hydraulic drive circuit.

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 3 is a schematic diagram of the structure of the proximal part of the interventional device delivery system of this application;

Figure 4 is a schematic diagram of the internal structure of the interventional device delivery system in Figure 3 (part of the shell is hidden);

5 is a schematic diagram of the internal structure of another embodiment of the interventional device delivery system of this application;

6 is a schematic diagram of the structure of the interventional instrument delivery system in FIG. 5 after moving two cylinders;

Fig. 7 is a schematic diagram of the structure of the distal part of the interventional instrument delivery system in Fig. 5;

8 is a schematic diagram of the internal structure of the interventional device delivery system in FIG. 5 after omitting two cylinders;

Fig. 9 is a schematic diagram of position changes of two pistons of the interventional instrument delivery system in Fig. 8;

10 is a schematic diagram of the structure of two cylinders in an embodiment of the interventional device delivery system according to the present application;

Fig. 11 is a schematic diagram of the two cylinders in Fig. 10 from another angle;

Figure 12 is an exploded view of the two cylinders in Figure 10 (additional component fixing sleeves);

Figure 13 is a side view of the two cylinders in Figure 10;

Figure 14 is a sectional view of A-A in Figure 13;

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

16 is a schematic diagram of the structure of the driving pump part in an embodiment of the interventional device delivery system of the present application;

Figure 17 is a schematic diagram of the pump housing of the driving pump in Figure 16;

Figure 18 is a schematic diagram of the structure of the working parts of the driving pump in Figure 16;

19 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;

Figure 20 is an exploded view of the multi-way switching valve in Figure 19;

Figure 21 is a schematic diagram of the multi-way switching valve in Figure 19 installed on the control handle;

Figure 22 is a schematic diagram of the valve core structure of the multi-way switching valve in Figure 19;

Fig. 23 is another structural schematic diagram of the valve core in Fig. 22 from another angle;

Fig. 24 is another structural schematic diagram of the multi-way switching valve in Fig. 19 from another angle;

25 is a schematic structural diagram of a fixing sleeve in an embodiment of an interventional device delivery system according to the present application;

Fig. 26 is a schematic diagram of another angle of the fixing sleeve in Fig. 25;

FIG. 27 is a cross-sectional view of the fixed sleeve part in an embodiment of the interventional device delivery system of the present application;

28 is a cross-sectional view of the first piston part in an embodiment of the interventional device delivery system of the present application;

29 is a cross-sectional view of the second piston part in an embodiment of the interventional device delivery system of the present application;

FIG. 30 is a partial schematic diagram of two piston parts in an embodiment of the interventional device delivery system of the present application; FIG.

FIG. 31 is a schematic diagram of the structure of the first piston in an embodiment of the interventional device delivery system of this application;

Fig. 32 is a schematic structural view of the first piston in Fig. 31 from another angle;

Figure 33 is an exploded view of the first piston in Figure 31;

Fig. 34 is a schematic structural view of the first piston in Fig. 31 with the sealing sleeve omitted;

35 is a schematic structural view of the first piston in FIG. 34 after omitting the sealing sleeve from another angle;

FIG. 36 is a schematic diagram of the hydraulic working principle in an embodiment of the interventional device delivery system of this application;

Fig. 37 is an enlarged view of the part D1 of the gear position in Fig. 36;

FIG. 38 is a schematic diagram of the hydraulic working principle in another embodiment of the interventional device delivery system according to the present application;

FIG. 39 is a schematic diagram of the hydraulic working principle in another embodiment of the interventional device delivery system according to the present application;

FIG. 40 is a schematic diagram of the structure of the distal part in an embodiment of the interventional device delivery system of the present application; FIG.

Figure 41 is a schematic diagram of the lock in Figure 40 in a locked state;

Figure 42 is a schematic diagram of the lock in Figure 41 in an unlocked state;

FIG. 43 is a schematic diagram after omitting the middle pipe in FIG. 42;

FIG. 44 is a schematic structural diagram of the distal part (the lock member is in the locked state) in another embodiment of the interventional instrument delivery system of the present application;

Figure 45 is a schematic diagram of the lock in Figure 44 in an unlocked state;

Fig. 46 is a schematic diagram after omitting the intermediate pipe in Fig. 45;

FIG. 47 is a schematic structural diagram of the distal part in another embodiment of the interventional instrument delivery system according to the present application;

Figure 48 is a schematic diagram of the lock in Figure 47 in a locked state;

Figure 49 is a schematic diagram of the lock in Figure 48 in an unlocked state;

Fig. 50 is a schematic diagram of the intermediate pipe in Fig. 49 after the middle pipe is omitted.

The reference signs in the figure are explained as follows:

1. Pipe fittings;

11. The first pipe fitting; 111, the guide head; 112, the mounting head; 113, the pipe joint; 114, the fastening sleeve; 115, the key hole; 116, the threading hole; 117, the positioning slot; 118, the positioning protrusion; 119. Auxiliary parts; 12. Second pipe fitting; 121. Loading section; 122. Fastening sleeve; 13. Intermediate pipe fitting; 131. Locking piece; 132. Connecting seat; 133. Fastening sleeve; 134. Binding line; 135. Wire loop; 14. Protection tube;

2. Control handle;

21. Working part; 211. Distal end; 212. Proximal end; 22. Holding part; 23. Positioning component; 24. First half shell; 25. Second half shell; 26. Positioning post;

3. Cylinder;

31. The first cylinder; 311, the first hydraulic chamber; 312, the first chamber; 313, the second chamber; 314, the communication port; 315, the communication port; 32, the second cylinder; 321, the second hydraulic pressure Cavity; 322, the third chamber; 323, the fourth chamber; 324, the communication port; 325, the communication port; 33, the hydraulic pipeline; 331, the first one-way valve; 332, the second one-way valve; 34, Isolation seal; 35, distal sealing plug; 36, proximal sealing plug;

4. The first piston;

41. Fixed seal part; 42, Sliding seal part; 43. Connecting sleeve; 431. First air gap; 432. Reinforcing rib; 44. Support frame; 441. Avoidance groove; 45. Seal sleeve; 451. Recessed area; 46. The first exhaust hole; 47. Balance hole; 48. Balance valve core; 481. Linkage rod; 482. Seal head; 49. Through hole;

5. Drive the pump;

51. Pump housing; 52. Work piece; 53, Drive; 531, Shaft hole; 54, inlet; 55, outlet; 56, transit port; 57, pump chamber;

6. Multi-port switching valve;

61, valve seat; 62, valve core; 63, wrench; 64, identification; 65, interface; 66, runner; 67, drive side interface; 68, work side interface;

7. Liquid storage tank;

71. Liquid injection port; 72. Liquid injection joint; 73. Inlet; 74. Outlet;

8. Fixed sleeve;

81. Through hole; 82. The third exhaust hole; 83. Positioning groove; 84. Receiving cavity;

9. The second piston;

91. Fixed sealing part; 92. Sliding sealing part;

10. Bracket;

101. Connect ears.

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 present delivery system can be used to treat heart valves (for example, mitral valve, aortic valve, tricuspid valve and/or pulmonary valve). The treatment may 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 the delivery of the catheter system through the vein or femoral artery; or other minimally invasive surgical methods, including but not limited to the transapical method of delivery of the catheter.

Referring to Figure 1, the interventional device 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 for driving the relative movement of the plurality of tubes 1 The 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 uses the 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, for example, 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 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 Figure 2a, in one of the embodiments, the multiple pipes include a first pipe 11 and a second pipe 12 that are nested slidingly and sequentially from the inside out. The distal end of the first pipe 11 is used for placing interventional instruments, and the two pipes During relative movement, the distal end of the second tube 12 wraps or releases the interventional instrument. A protective tube (not shown in Figures 1 and 2a) fixedly connected to the control handle can be sheathed on the outside of the proximal end of the second tube member 12.

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, there are connecting ears. The outer wall of the mounting head is usually provided with grooves or protrusions for mating with the connecting ears of interventional instruments. When loading, the connecting ears are engaged with the grooves of the mounting head 112 or hung on the protrusions. In order 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.

Referring to Figure 2b and Figure 2c, there is no strict limitation on the specific shape of the interventional device involved in this application. 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 end with a connecting ear 101. The expansion head can also have a ring-shaped or C-shaped connecting part.

The stent 10 is a radially compressible or expandable structure, and is generally a mesh cylindrical structure formed by cutting or weaving.

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

Referring to Figures 3 and 4, the control handle 2 is provided with a hydraulic chamber, namely the first hydraulic chamber 311, and the two pipes adjacent to each other in the radial direction are the first pipe 11 and the second pipe 12 sleeved on the outside. The second pipe 12 in the outer layer enters the first hydraulic chamber 311 and is fixed to the first piston 4 in the first hydraulic chamber 311, and the first pipe 11 in the inner layer extends out of the first hydraulic chamber 311 and is fixed to the control handle 2.

The shape of the control handle 2 is not strictly limited. In order to facilitate the packaging of other components, a separate structure can be used, that is, the control handle 2 includes a first half shell 24 and a second half shell 25 that are buckled with each other. Of course, to facilitate local maintenance or Operation can also be divided into more parts.

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 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 this embodiment, a first cylinder 31 is fixed inside the control handle 2, and the hydraulic chamber inside the first cylinder 31 is the first hydraulic chamber 311, and the piston in the hydraulic chamber is slidably mounted in the first hydraulic chamber 311 First piston 4.

In order to protect the first cylinder barrel 31, the first half-shell 24 and the second half-shell 25 buckle and surround the first cylinder barrel 31. In a preferred embodiment, the control handle 2 is provided with the first cylinder barrel 31. Matching positioning component 23. For example, in FIG. 4, it can be seen that the positioning component 23 is one or more positioning steps, and the shape of the positioning step corresponds to the outer contour of the first cylinder 31 to clamp and fix the first cylinder 31.

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 first cylinder 31 is located in the working part 21, that is, the working part 21 is used to provide the first hydraulic chamber 311 as a whole, and the working part 21 has a distal end 211 and a proximal end 212 opposite to each other.

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.

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.

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.

Refer to Figure 4 (in order to avoid component interference, the first cylinder barrel 31 is removed. The hydraulic chamber and each chamber are still shown with reference to the relative position of the piston, and other related views are the same), the hydraulic chamber in this embodiment is The first hydraulic chamber 311; the piston is the first piston 4 slidably mounted in the first hydraulic chamber 311, the proximal end of the second tube 12 penetrates the first hydraulic chamber 311 and is fixedly connected with the first piston 4, the first tube 11 After passing through the first piston 4 through the second tube 12, the proximal end of the second tube 12 further extends until it is fixedly connected with the control handle 2.

Relative to the working part 21 of the control handle 2, the second tube 12 extends from the distal end 211 of the working part 21 into the first hydraulic chamber 311, and the first tube 11 extends and is connected to the proximal end 212 of the working part 21.

Since the proximal end of the first tube 11 is fixedly connected with the control handle 2, when the first piston 4 moves, the second tube 12 can be driven to slide axially relative to the first tube 11, and corresponding functions are realized at the distal ends of the two tubes.

Specifically, the first piston 4 divides the first hydraulic chamber 311 into a first chamber 312 and a second chamber 313, each chamber is connected to the hydraulic drive circuit through a corresponding communication port, and the proximal end of the second pipe 12 penetrates The first chamber 312 is fixedly connected to the first piston 4, the proximal end of the first tube 11 penetrates the first piston 4 through the second tube 12, and then extends out of the first hydraulic chamber 311 through the second chamber 313.

Of course, as a hydraulic drive mode, each pipe must be sealed at the position where it enters and exits the first cylinder 31. According to the movement relationship of the pipe relative to the first cylinder 31, a fixed seal or a sliding seal is adopted accordingly.

Each communication port is provided in the first cylinder 31. The hydraulic drive circuit is used to drive the first piston 4 in the first cylinder 31 to reciprocate. The hydraulic drive circuit can be equipped with necessary pump valves and other control devices as required, in order to further improve The degree of integration, in one embodiment, the hydraulic drive circuit is configured on the control handle 2 and is used to drive the first piston 4 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 114, and the fastening sleeve 114 can be filled on the outer wall of the first pipe piece 11 and the inner wall of the pipe joint 113 Between, to achieve tightening and sealing.

In the embodiment of FIGS. 5-9, the control handle 2 is provided with two hydraulic chambers, namely a first hydraulic chamber 311 and a second hydraulic chamber 321. The multiple pipes include the first slidable and nested one from the inside to the outside. The pipe fitting 11, the intermediate pipe fitting 13 and the second pipe fitting 12;

Two pipes adjacent to each other in the radial direction can be regarded as two groups with different reference objects:

The first group is the middle tube 13 and the second tube 12 sleeved on the outside. The second tube 12 in the outer layer enters the first hydraulic chamber 311 and is fixed with the first piston 4 in the first hydraulic chamber 311. The inner middle tube 13 extends out of the first hydraulic chamber 311 and is connected to the second piston 9 in the second hydraulic chamber 321.

The second group is the first pipe 11 and the intermediate pipe 13 sleeved on the outside. The intermediate pipe 13 in the outer layer enters the second hydraulic chamber 321 and is fixed with the second piston 9 in the second hydraulic chamber 321. The first pipe 11 of the first layer extends out of the second hydraulic chamber 321 and is fixed to the control handle 2.

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 cylinder 31 and the second cylinder 32 are arranged coaxially with each other. For docking, an isolation seal 34 is provided at the docking position, and the proximal end of the intermediate tube 13 slides and seals through the isolation seal 34 and enters the second hydraulic chamber 321.

There are three pipe fittings that slide and nest sequentially from the inside to the outside, of which:

The distal end of the first tube 11 is used for placing interventional instruments;

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;

The distal end of the second tube 12 has a loading section for wrapping or releasing interventional instruments.

The first tube 11 and the interventional device can be separated from each other in the body, that is, the interventional device stays in the body; it can also be connected to each other. After the operation is completed, the interventional device does not remain in the body, but is withdrawn to the body with the first tube 11 in vitro.

In an embodiment, 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 connection part between the intermediate tube 13 and the first tube 11 at the distal end may 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 Install the head.

At the second cylinder 32, the second piston 9 separates the second hydraulic chamber 321 into a third chamber 322 and a fourth chamber 323. Each chamber is connected to the hydraulic drive circuit through a corresponding communication port. The proximal end penetrates into the third chamber 322 and is fixedly connected to the second piston 9, the proximal end of the first tube 11 passes through the second piston 9 through the intermediate tube 13, and then extends out of the second hydraulic chamber 321 through the fourth chamber 323 .

A pipeline joint is installed at the proximal end of the corresponding working part 21, and the first pipe piece 11 extends and is connected to the pipeline joint 113.

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.

8 and 9, when only the first piston 4 moves distally, the second tube 12 is driven to move distally, and the positions of the first tube 11 and the middle 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.

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 each pipe 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 of the embodiments, a hydraulically driven interventional instrument delivery system is provided, which includes a plurality of pipes 1 coaxially arranged from the inside to the outside, and a control handle 2 for driving the relative movement of the multiple pipes 1. Each pipe 1 The distal end is used to cooperate with each other to operate interventional instruments, the proximal end of each tube 1 is connected to the control handle 2, and the control handle 2 uses a hydraulic way to drive the relative movement of each tube 1;

The control handle 2 is provided with one or more hydraulic chambers, and pistons are slidably installed in each hydraulic chamber. The control handle 2 is also equipped with a hydraulic drive circuit for driving the relative movement of each pipe 1 through the pistons. 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.

In order to buffer and temporarily store the liquid, in one of the embodiments, 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 and installed inside the control handle 2. Or when in use, liquid is filled on site, and 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.

For example, in one embodiment, a liquid injection joint 72 is installed on the control handle 2, and the liquid injection joint 72 communicates with the liquid injection port 71 through the driving pump 5 for filling the liquid storage tank 7 with liquid.

The external liquid filling equipment is connected to the filling connector 72, and then the liquid is filled into the liquid storage tank 7 via the drive pump 5. This saves the external pressurizing equipment and makes full use of the hydraulic drive circuit of the interventional instrument delivery system to realize the liquid Raise.

In an embodiment, the control valve includes:

The multi-way switching valve 6 has a drive-side interface communicating with the inlet and outlet of the drive pump 5, and a plurality of working-side interfaces, wherein every two working-side interfaces are connected to one of the hydraulic chambers, and the multi-way switching valve 6 has Multiple gears are used to switch the communication relationship between the drive side interface and different working side interfaces to control the liquid flow direction.

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. The two one-way valves can 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 an embodiment, the control valve further includes:

Two one-way valves, the outlet of the drive pump 5 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 7 in turn.

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.

10-14, in an embodiment of the present application, the first cylinder barrel 31 and the second cylinder barrel 32 are arranged coaxially and are connected to each other through the isolation seal 34, and the distal end of the first cylinder barrel 31 is provided with a distal end The sealing plug 35 and the first cylinder barrel 31 are also provided with a communication port 314 and a communication port 315 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.

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 seal 34 is connected to the second piston 9, the first tube 11 extends from the second piston 9 inside the middle tube 13, and the penetrating proximal sealing plug 36 is further fixed and sealed and connected to the control handle 2.

With reference to Figures 8 and 9, when only the first piston 4 moves distally, the second tube 12 is driven to move distally, while the positions of the intermediate tube 13 and the first tube 11 remain unchanged. The same is true when the first piston 4 moves to the proximal end.

Referring to Figure 15, in one embodiment, the liquid storage tank 7 is a cylindrical structure with closed ends, the bottom end of the liquid storage tank 7 is provided with a liquid injection port 71, and the side wall is provided with an inlet 73 and an outlet 74 through the inlet 73 And the outlet 74 is connected to the hydraulic drive circuit.

Referring to Figures 16-18, in one embodiment, the driving pump 5 includes:

The pump housing 51 fixed to the control handle (the first half shell 24 of the control handle is shown in the figure) 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 is movably installed on the control handle and linked with the work part 52.

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.

When it needs to be used with the liquid injection port 71 of the liquid storage tank 7, a liquid injection joint 72 is also fixed on the first half shell 24, and the corresponding pump casing 51 is provided with a relay port 56 communicating with the pump chamber 57. When liquid is injected, The liquid enters the pump chamber 57 through the liquid injection port 71 and the transfer port 56 in sequence, and then enters the liquid storage tank 7 through the outlet 55 and the liquid injection port 71 in sequence. In order to inject the liquid, the liquid injection pipeline can be separately configured and the necessary control valve is set. Avoid interference with the hydraulic drive circuit.

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 grip part 22 connected to the working part, and an operating button Installed in the grip 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 part can be provided between the driving part 53 and the control handle, such as a compression spring or a tension spring acting with the driving part 53, or a coil spring installed on the rotating shaft. In order to make the working part 52 reciprocate, the resetting part can also be directly Acting on the working member 52, for example, a compression spring located in the pump chamber 57 that directly abuts 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 19-24, 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 inside, and a plurality of ports 65 are opened on the side wall of the valve cavity. Used to connect the drive pump and the hydraulic chambers. The valve core 62 is placed in the valve chamber and rotates to fit. 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, the multiple flow passages 66 and There is a corresponding communication relationship between the multiple interfaces 65. For easy identification, in one embodiment, the multi-port switching valve 6 is embedded in the control handle 2, and the control handle 2 is provided with an indication of the position of the multi-port switching valve 6 Bit identification 64.

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 cooperate with the functions of different gears, seven runners 66 (pointed by the arrows in FIG. 24) are provided. Its specific functions are further described in other embodiments below. Of course, the flow channel 66 can also be increased or decreased according to the functions to be realized.

With reference to Figure 6, Figure 7, Figure 12 to Figure 14, Figure 25 to Figure 27, in order to establish a stable intervention channel, in one embodiment, the outside of the second tube 12 is also sheathed with a protective tube 14, the protective tube 14 The proximal end is fixed with 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.

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 edges of the two half shells of the control handle 2 are engaged with the positioning groove 83. For example, in FIG. 27, it can be seen 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.

In one embodiment, the first cylinder barrel has a distal sealing plug 35, the proximal end of the fixing sleeve 8 is provided with a receiving cavity 84 communicating with the through hole 81, and a part of the distal sealing plug 35 extends into the receiving cavity 84. Partially sealed and filled between the fixing sleeve 8 and the outer wall of the second pipe 12. That is, by adopting an indirect sliding and sealing fit, after the second tube 12 passes through the distal sealing plug 35 from the fixed sleeve 8, it also enters the hydraulic chamber in the first cylinder.

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.

In one embodiment, the proximal end of the fixing sleeve 8 is in sliding and sealing fit with the outer wall of the second tube 12, the radial gap between the protective tube 14 and the second tube 12 is the third exhaust gap, and the side wall of the fixing sleeve 8 is provided with The third exhaust hole 82 communicates with the third exhaust gap.

The proximal end of the fixed sleeve 8 and the sliding seal fitting part of the outer wall of the second tube 12 are used as the sealing point, and the axial position of the third exhaust hole 82 is located between the proximal end of the protective tube 14 and the sealing point, so that it will not be exhausted during exhaust. As for affecting the proximal side of the sealing point, it will not affect the normal operation of the hydraulic chamber.

In order to make full use of the existing hydraulic drive circuit, the third exhaust hole 82 is connected to the hydraulic drive circuit. For example, one of the working side ports of the multi-way switching valve is connected to the third exhaust hole 82; the multi-way switching valve has multiple gear positions, and one gear position connects the outlet of the driving pump with the third exhaust hole 82, namely It can be vented by liquid filling.

Refer to Figure 28 to Figure 35, each hydraulic chamber is equipped with a piston, each piston can adopt the same structure on its own, but the position and the pipes passing through are different, but it does not affect its structural characteristics and working principle. .

The two pipe fittings adjacent to each other in the radial direction include an outer pipe fitting and an inner pipe fitting, and each piston includes:

The fixed sealing part and the sliding sealing part are fixedly connected, and at least one of them is sliding and sealingly fitted with the inner wall of the hydraulic chamber where it is located.

In an embodiment, the two pipes adjacent to each other in the radial direction include the outer pipe, that is, the second pipe 12, and the inner pipe, that is, the middle pipe 13, and the first piston 4 includes:

The fixed sealing portion 41 is sleeved on the second pipe 12 and is fixedly and sealedly fitted with the outer wall of the second pipe 12;

The sliding sealing portion 42 is sleeved on the intermediate pipe 13 and is slidingly and sealingly fitted with the outer wall of the intermediate pipe 13;

The fixed sealing portion 41 and the sliding sealing portion 42 are fixedly connected, and the outer peripheries of both are sliding and sealingly fitted with the inner wall of the first hydraulic chamber.

The first piston 4 has a through hole extending along the axis. The proximal end of the second tube 12 is fixedly connected in the through hole through a fastening sleeve 122. The fastening sleeve 122 can fill the radial gap on the one hand, and also facilitate the axial direction. Positioning and assembly. 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.

In one embodiment, the two pipes adjacent to each other in the radial direction include the outer pipe, that is, the middle pipe 13, and the inner pipe, that is, the first pipe 11. The second piston 9 includes:

The fixed sealing portion 91 is sleeved on the intermediate pipe 13 and is fixedly and sealedly fitted with the outer wall of the intermediate pipe 13;

The sliding sealing portion 92 is sleeved on the first pipe 11 and is slidingly and sealingly fitted with the outer wall of the first pipe 11;

The fixed sealing portion 91 and the sliding sealing portion 92 are fixedly connected, and the outer peripheries of both are sliding and sealingly fitted with the inner wall of the second hydraulic chamber.

The second piston 9 has a through hole extending along the axis. The proximal end of the intermediate tube 13 is fixedly connected in the through hole by a fastening sleeve 133. The fastening sleeve 133 can fill the radial gap on the one hand, and also facilitate axial positioning. And assembly. The second piston 9 is fixedly connected to the intermediate pipe 13 and is in sliding fit with the first pipe 11, so the second piston 9 can drive the intermediate pipe 13 when it moves, but the position of the first pipe 11 is not affected.

The proximal end of the first tube 11 passes through the second hydraulic chamber and is fixedly connected to the pipeline joint 113 through a fastening sleeve 114.

The radial gap between the two adjacent pipes in the radial direction is an exhaust gap, and the hydraulic drive circuit is also connected with the exhaust gap for exhausting. 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 integrate the exhaust function, the application further improves the structure of the piston.

In one embodiment, the piston is provided with a balance hole, and a balance valve core is installed at the position of the balance hole; the piston is also provided with an exhaust hole communicating with the exhaust gap, and the exhaust hole is located at the fixed seal part and the sliding seal The piston separates the hydraulic chamber in which it is located into two chambers. When the pressure in the two chambers approaches, the balance valve core opens to connect the two chambers and the exhaust hole.

Since the two pistons have the same structure, the first piston 4 is taken as an example in the following, and the second piston 9 is the same. The fixed sealing portion 41 and the sliding sealing portion 42 in the first piston 4 are fixed to each other by a connecting sleeve 43.

Both the fixed sealing portion 41 and the sliding sealing portion 42 include a supporting frame 44 and a sealing sleeve 45 that wraps and wraps the outside of the supporting frame 44, and the connecting sleeve 43 is fixed between the two supporting frames 44.

The radial gap between the second pipe 12 and the intermediate pipe 13 is the first exhaust gap. The side wall of the connecting sleeve 43 in the first piston 4 is provided with a first exhaust hole 46 communicating with the first exhaust gap; the first piston In 4, between the outer wall of the connecting sleeve 43 and the inner wall of the first hydraulic chamber, there is a first air gap 431 communicating with the first exhaust hole 46, and the axial position of the first air gap 431 is in the first piston 4 between the fixed sealing portion 41 and the sliding sealing portion 42.

A plurality of first vent holes 46 may be opened along the circumferential direction of the connecting sleeve 43 to ensure the smooth passage of liquid.

In the same way, the radial gap between the intermediate pipe 13 and the first pipe 11 is the second exhaust gap, and the side wall of the connecting sleeve in the second piston 9 is provided with a second exhaust hole communicating with the second exhaust gap.

A second air gap communicating with the second exhaust hole is left between the outer wall of the connecting sleeve in the second piston 9 and the inner wall of the second hydraulic chamber, and the axial position of the second air gap is in the second piston 9 Between the fixed sealing portion 91 and the sliding sealing portion 92.

In an embodiment, the support frame 44 includes:

The annular portion opposite to the axial end of the connecting sleeve 43;

The supporting plate is fixed on the outer periphery of the ring part, and the sealing sleeve 45 is wrapped around the supporting plate.

The annular portion and the connecting sleeve 43 can be an integral structure, that is, the two axial ends of the connecting sleeve 43 serve as the annular portion, and the supporting disk is a disk of a frame structure. In order to ensure the strength, a plurality of reinforcing ribs 432 are further provided on the outer periphery of the connecting sleeve 43, and the reinforcing ribs 432 are connected between the supporting frame 44 of the fixed sealing portion 41 and the sliding sealing portion 42.

Each support frame 44 and the sealing sleeve 45 are provided with a through hole 49. The connecting sleeve 43 in the support frame 44 has an axial through structure, and the through area is used as a through hole. The through hole 49 on the sealing sleeve 45 has a corresponding position, and each through hole is used For penetrating the pipe, depending on the position of the piston, the second pipe 12, the intermediate pipe 13 or the first pipe 11 may be directly matched with the inner edge of the through hole through which the second pipe piece 12, the intermediate pipe piece 13 or the first pipe piece 11 passes, and the passing part is sealed and fitted. The outer circumference of the sealing sleeve 45 is in sliding and sealing fit with the inner wall of the hydraulic chamber where it is located.

The fixed sealing portion 41 and the sliding sealing portion 42 are respectively provided with a balance hole 47 communicating with the first air gap 431. Since the support plate is a frame structure, the balance hole 47 is directly opened on the sealing sleeve 45 on each side, in order to avoid For the balance valve core 48, the support frame 44 is provided with an escape groove 441 for the balance valve core 48 to penetrate.

When the pressure on both sides of the first piston 4 is not equal, the liquid on the high pressure side will drive the balance valve core 48 to move to close the balance hole 47 on that side, and then push the first piston 4 to move to the low pressure side.

When venting is required, liquid can be fed into the first chamber and the second chamber on both sides of the first piston 4 at the same time, so that the pressure on both sides of the first piston 4 is basically the same. At this time, the position of the balance valve core 48 is exactly in the center, that is, the fixed seal The balance hole 47 on the part 41 and the sliding seal part 42 are both in an open state, and the liquid will enter the first air gap 431 through the balance hole 47, and then enter the first exhaust gap through the first exhaust hole 46 to achieve liquid filling. exhaust.

In one embodiment, the balance valve core 48 includes:

The linkage rod 481 slides through the balance holes 47 on the fixed sealing portion 41 and the sliding sealing portion 42, and has a clearance fit at the penetration portion;

The two sealing heads 482 are respectively fixed to the two ends of the linkage rod 481, and correspondingly close or open the balance hole 47 under the action of the pressure on both sides of the piston.

In a preferred embodiment, in order to ensure the sealing effect, the sealing head 482 is spherical, and the opposite sides of the fixed sealing portion 41 and the sliding sealing portion 42 are respectively provided with a recessed area 451 on the periphery of the balance hole 47, and the sealing head 482 is located When the balance hole 47 is closed, it abuts against the recessed area 451.

According to the specific position of the proximal end of the second tube 12, the manner in which the liquid enters the first exhaust gap from the first exhaust hole 46 is also slightly different.

In one embodiment, the proximal end of the second tube 12 passes through the connecting sleeve 43 of the first piston 4 and then is fixed to the support frame 44 in the sliding seal portion 42 of the first piston 4, that is, the second tube 12 has blocked the connection. The first exhaust hole 46 on the sleeve 43 is provided with an adapted exhaust hole that matches the position of the first exhaust hole 46 on the pipe wall of the second pipe 12 at this time.

In one embodiment, the proximal end of the second tube 12 is fixed to the first piston 4 by a fastening sleeve 122, and the fastening sleeve 122 is fixed to the support frame 44 in the sliding seal portion 42 of the first piston 4, that is, the second tube. 12 and the fastening sleeve 122 have blocked the first exhaust hole 46 on the connecting sleeve 43, and at this time, the second pipe 12 and the fastening sleeve 122 are both provided with an adaptive exhaust that matches the position of the first exhaust hole 46. hole.

In an embodiment, the proximal end of the second tube 12 is fixed to the support frame 44 in the fixed sealing portion 41 of the first piston 4. That is, the second pipe 12 does not block the first exhaust hole 46, and at this time, the first exhaust hole 46 can directly communicate with the first exhaust gap.

At the second piston 9, the connection relationship of the proximal end of the intermediate tube 13 and the opening method adapted to the exhaust hole are the same.

Referring to Figures 36 to 37, 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 valve core 48 with a balance. The 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 with a balanced valve core, and the second cylinder 32 has a communication port 324 and通口325。 Connecting 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 a third vent 82 is provided on the fixing sleeve 8.

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. The corresponding driving-side ports 67 and the working-side ports 68 can be connected through multiple flow passages 66 on the spool inside the multi-way switching valve 6. Based on different communication relationships, the corresponding drive-side ports 67 and the working-side ports 68 can be connected. It is divided into seven gears D1～D7, and each gear realizes different functions.

Specifically, the functions of each gear are as follows:

In gears D5 and D6, the chambers on both sides of the piston are connected to the outlet 55 of the driving pump 5 at the same time, that is, the liquid is introduced at the same time, so that the balance valve core is centered, and all the balance holes are opened, so that the liquid can be poured into the corresponding row. Air gap.

Referring to FIG. 38, in another embodiment, only the first cylinder 31 is used, and the first piston 4 with a balance valve core 48 is installed in the first cylinder 31. The first cylinder 31 has a communication port 314 and a communication port. 315.

The pipes moving relative to each other in the axial direction include a second pipe fixedly connected to the first piston 4 and a first pipe fixedly connected to the control handle.

In this embodiment, the multi-port switching valve 6 has four ports in total, two of which are drive-side ports, 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), and the multi-port switching The other two of the valve 6 are working side ports, which can be divided into three gears D1 to D3 based on different communication relationships, and each gear performs a different function.

Specifically, the functions of each gear are as follows:

In gear D3, the chambers on both sides of the piston are connected to the outlet 55 of the driving pump 5 at the same time, that is, the liquid is simultaneously introduced, so that the balance valve core is centered, and all the balance holes are opened, so that the liquid can be poured into the second pipe and the first pipe. The gap of a pipe is exhausted.

Referring to FIG. 39, in another embodiment, only the first cylinder 31 is used, and the first piston 4 with a balance valve core 48 is installed in the first cylinder 31. The first cylinder 31 has a communication port 314 and a communication port. 315.

The control handle is also connected with a protective tube on the outer periphery of the second pipe through a fixed sleeve 8, and the fixed sleeve 8 is provided with a third exhaust hole 82.

In this embodiment, the multi-port switching valve 6 has five ports in total, two of which are drive-side ports, which are respectively connected to the outlet and inlet of the drive pump 5 (indirectly communicated through the one-way valve and the liquid storage tank), and the multi-port switching The other three of the valve 6 are working side ports, which can be divided into four gears D1 to D4 based on different communication relationships, and each gear performs a different function.

Specifically, the functions of each gear are as follows:

In gear D3, the chambers on both sides of the piston are connected to the outlet 55 of the driving pump 5 at the same time, that is, the liquid is simultaneously introduced, so that the balance valve core is centered, and all the balance holes are opened, so that the liquid can be poured into the second pipe and the first pipe. The exhaust gap of a pipe.

Referring to Figures 40 to 43, the control handle can drive the relative movement of each tube to achieve related operations on the interventional instrument at the distal end. In one embodiment, the first tube 11 is provided with a mounting head 112 for connecting the interventional instrument. , A lock hole 115 is provided on the mounting head 112;

The distal end of the middle tube 13 is fixed with a lock 131, which is inserted into the lock hole 115 in the locked state, and the interventional instrument itself or is tied to the lock 131 by a lashing wire, and the lock 131 is released from the lock in the unlocked state. Hole 115 to release the interventional instrument.

The proximal end of the interventional instrument can have its own hooks, snares, etc., which are directly wound on the lock 131 through the hooks and snares, and the distal end of the lock 131 is inserted into the lock hole 115, so the proximal position of the interventional instrument can be restricted. Only when the lock 131 escapes from the lock hole 115 can the proximal end of the interventional instrument be released.

In addition, a lashing line can be provided. One part of the lashing line is connected to the proximal end of the interventional instrument, and the other part is wound on the lock 131, which can also be used for restriction or release.

The distal end of the first tube 11 is the guiding head 111, and the interventional instrument installation position is between the guiding head 111 and the mounting head 112. When the interventional instrument is input, the interventional instrument is radially compressed and sleeved on the first tube 11, and the distal end of the interventional instrument The proximal end of the interventional instrument is connected to the mounting head 112 and is further defined by the lock 131. The distal end of the second tube 12 has an enlarged loading section to wrap the interventional instrument. When released, the second tube 12 Withdrawal (slide to the proximal side), the interventional instrument is gradually exposed and radially expanded and expanded. However, because the proximal end of the interventional instrument is locked on the mounting head 112, even if the interventional instrument is completely exposed to the second tube 12, its proximal end is not Release, after confirming the position of the interventional instrument, then withdraw the intermediate tube 13 so that the lock 131 is away from the lock hole 115, and then the proximal end of the interventional instrument can be completely released, so that the second tube 12 can be pushed forward when the position is not good. Retrieve the interventional instrument, reload and adjust the position.

In one embodiment, the lock 131 is rod-shaped, a connecting seat 132 is fixed inside the middle tube 13, the proximal end of the lock 131 is inserted and fixed to the connecting seat 132, and the distal end of the lock 131 passes along with the middle tube 13 The axial movement cooperates with the lock hole 115.

In order to balance the distribution of the locking force, in a preferred embodiment, the locking member 131 is a plurality of straight rods arranged side by side. Each straight rod extends along the axial direction of the intermediate pipe 13, and a plurality of straight rods are evenly distributed along the circumferential direction of the intermediate pipe 13, for example, two to four.

The proximal end of the interventional instrument generally has a connecting ear. A positioning slot 117 corresponding to the connecting ear can be provided on the outer periphery of the mounting head 112 to further maintain the position of the connecting ear and prevent unnecessary axial direction between the connecting ear and the mounting head 112. Sliding or relative rotation.

When used in combination with a lashing line, in order to facilitate the threading of the lashing line, a threading hole 116 can be provided on the mounting head 112. The threading hole 116 can run along the axial or radial direction of the mounting head 112, or it can be the mounting head 112. The self-opening can also be realized by using auxiliary parts with holes, of course, the auxiliary parts are fixedly connected with the mounting head.

The distal end of the connecting ear 101 is provided with a ring-shaped connecting part. The binding wire 134 passes through the ring-shaped connecting part and the threading hole 116, and a wire loop 135 is left at the end. The lock 131 passes through the wire loop 135 and then enters into the lock hole 115 , So that the wire loop 135 cannot get out of the lock 131, that is, the connecting ear 101 is tied to the mounting head 112.

It can be seen in FIG. 43 that the lock 131 is released from the lock hole 115 in the unlocked state, and the wire loop 135 is released from the restriction. After the connecting ear 101 further moves, the lashing wire 134 can be drawn out of the annular connecting part to release the interventional instrument.

Referring to Figures 44 to 46, in another embodiment, positioning protrusions 118 corresponding to the connecting ears are provided on the outer periphery of the mounting head 112 to further maintain the position of the connecting ears and prevent unnecessary connection between the connecting ears and the mounting head 112. Axial sliding or relative rotation. In addition, the threading hole 116 extends radially and is just opened on the positioning protrusion 118. The positioning protrusions 118 are two symmetrical. The threading hole 116 penetrates the two positioning protrusions 118 along the axial direction of the positioning protrusion 118.

Referring to FIGS. 47-50, in another embodiment, positioning protrusions 118 corresponding to the connecting ears are provided on the outer circumference of the mounting head 112 to further maintain the position of the connecting ears and prevent unnecessary connection between the connecting ears and the mounting head 112. Axial sliding or relative rotation.

In addition, a tubular auxiliary component 119 is fixedly embedded in the outer periphery of the mounting head 112. The inside of the auxiliary component 119 is a threading hole 116, and the threading hole 116 extends along the axial direction of the mounting head 112.

There are many ways to wrap the lashing line, but generally at least through the threading hole 116, and contact with the connecting ear and the lock 131, after the lock 131 is out of the lock hole 115, the lashing line releases the connecting ear, or the connecting ear Release together with the lashing line.

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 delivery system driven by hydraulic means includes a plurality of tubes arranged coaxially from the inside to the outside, and a control handle for driving the relative movement of the plurality of tubes. The distal ends of the tubes are used to cooperate with each other to operate the interventional instrument, The proximal end of each tube is connected to the control handle, characterized in that the relative movement of each tube is driven hydraulically at the control handle;

The control handle is provided with one or more hydraulic chambers, and pistons are slidably installed in each hydraulic chamber, and a hydraulic drive circuit for driving the relative movement of various pipes through the pistons is also arranged at the control handle. The 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.
The interventional instrument delivery system driven by hydraulic pressure according to claim 1, wherein the two pipes adjacent to each other in the radial direction include an outer pipe and an inner pipe, and the outer pipe enters one of the hydraulic chambers and interacts with the hydraulic pressure. The piston in the cavity is fixed, and the inner tube is extended to connect to the pistons of other hydraulic chambers or fixed to the control handle.
The interventional instrument delivery system driven by hydraulic pressure according to claim 1, wherein the hydraulic drive circuit further comprises a liquid storage tank connected with the hydraulic pipeline to temporarily store liquid.
The interventional instrument delivery system driven by hydraulic pressure according to claim 3, wherein the liquid storage tank is provided with a liquid injection port.
The interventional instrument delivery system driven by hydraulic pressure according to claim 4, wherein a liquid injection joint is installed on the control handle, and the liquid injection joint communicates with the liquid injection port through the drive pump for Fill the liquid storage tank with liquid.
The interventional instrument delivery system driven by hydraulic pressure according to claim 1, wherein the liquid in the hydraulic driving circuit is physiological saline.
The interventional instrument delivery system driven by hydraulic pressure according to claim 1, wherein the control valve comprises:

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.
The interventional instrument delivery system driven by hydraulic pressure according to claim 7, wherein the control valve further comprises:

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.
The interventional instrument delivery system driven by hydraulic pressure according to claim 7, wherein a first cylinder is installed in the control handle, and the inside of the first cylinder is a first hydraulic chamber, and the multi-way switching valve Two of the working side interfaces are communicated with the first hydraulic chamber.
The interventional instrument delivery system driven by hydraulic pressure according to claim 9, wherein a first piston is slidably installed in the first hydraulic chamber, and the first piston divides the first hydraulic chamber into a first chamber The first chamber and the second chamber are connected to the hydraulic drive circuit through corresponding communication ports.
The interventional instrument delivery system driven by hydraulic pressure according to claim 10, wherein the setting of the multi-port switching valve is one of the following forms:

(a) The multi-port switching valve has four ports in total, two of which are drive-side ports, which are connected to the inlet and outlet of the drive pump respectively. The other two ports of the multi-port switching valve are working-side ports. The multi-port switching valve passes through Multiple flow passages on the spool connect the corresponding drive-side interface with the working-side interface. The multiple pipes include a first pipe and a second pipe arranged in sequence from the inside to the outside. Based on different communication relationships, they can be divided into D1~ D2 gear, the functions realized by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

(b) The multi-port switching valve has four ports in total, two of which are drive-side ports, which are connected to the inlet and outlet of the drive pump respectively. The other two ports of the multi-port switching valve are working-side ports. The multi-port switching valve passes through Multiple flow passages on the spool connect the corresponding drive-side interface with the working-side interface. The multiple pipes include a first pipe and a second pipe arranged in sequence from the inside to the outside. Based on different communication relationships, they can be divided into D1~ D3 gear, the functions realized by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: Exhaust the gap between the second pipe and the first pipe

(b) The multi-port switching valve has five ports in total, two of which are drive-side ports, which are respectively connected to the inlet and outlet of the drive pump. The other three ports are the working-side ports. The multi-port switching valve passes through the valve. The multiple flow passages on the core connect the corresponding drive-side interface and the working-side interface. The multiple pipes include a first pipe and a second pipe arranged in order from the inside to the outside. The second pipe is also sheathed with a protective tube, Based on different connectivity relationships, it can be divided into D1～D4 gears. The functions implemented by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: Exhaust the gap between the second pipe and the first pipe

D4: The gap between the protective pipe and the second pipe is exhausted.
The interventional instrument delivery system driven by hydraulic pressure according to claim 7, wherein a first cylinder and a second cylinder are installed in the control handle, and the inside of the first cylinder is a first hydraulic chamber, The inside of the second cylinder barrel is a second hydraulic chamber, two of the working side ports of the multi-way switching valve are connected with the first hydraulic chamber, and the other two working side ports are connected with the second hydraulic chamber.
The interventional instrument delivery system driven by hydraulic pressure according to claim 12, wherein a first piston is slidably installed in the first hydraulic chamber, and a second piston is slidably installed in the second hydraulic chamber, and the first piston Separate the first hydraulic chamber into a first chamber and a second chamber, the second piston separates the second hydraulic chamber into a third chamber and a fourth chamber, and each chamber is communicated with each other The port is connected to the hydraulic drive circuit.
The interventional instrument delivery system driven by hydraulic pressure according to claim 13, wherein the setting of the multi-way switching valve is one of the following forms:

(a) The multi-port switching valve has six ports in total, two of which are drive-side ports, which are connected to the inlet and outlet of the driving pump respectively. The other four ports of the multi-port switching valve are working-side ports. The multi-port switching valve passes through The multiple flow passages on the spool connect the corresponding drive-side interface and the working-side interface. The multiple pipes include a first pipe, an intermediate pipe and a second pipe arranged in sequence from the inside out, which can be divided based on different communication relationships. For D1～D4 gears, the functions realized by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: The second piston moves to the distal end

D4: The second piston moves proximally

(b) The multi-port switching valve has six ports in total, two of which are drive-side ports, which are respectively connected to the inlet and outlet of the drive pump. The other four ports of the multi-port switching valve are working-side ports. The multiple flow passages on the spool connect the corresponding drive-side interface and the working-side interface. The multiple pipes include a first pipe, an intermediate pipe and a second pipe arranged in sequence from the inside out, which can be divided based on different communication relationships. For D1～D6 gear positions, the functions realized by each gear position are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: The second piston moves to the distal end

D4: The second piston moves proximally

D5: Exhaust the gap between the middle pipe and the first pipe

D6: Exhaust the gap between the second pipe and the middle pipe

(c) The multi-port switching valve has seven ports in total, two of which are drive-side ports, which are respectively connected to the inlet and outlet of the drive pump. The other five ports of the multi-port switching valve are working-side ports. The multi-port switching valve passes through Multiple flow passages on the spool connect the corresponding drive-side interface with the working-side interface. The multiple pipes include a first pipe, an intermediate pipe and a second pipe arranged in sequence from the inside out. The second pipe is also sleeved outside There is a protection tube, which can be divided into D1～D7 gears based on different connections. The functions implemented by each gear are as follows:

D1: The first piston moves to the distal end

D2: The first piston moves proximally

D3: The second piston moves to the distal end

D4: The second piston moves proximally

D5: Exhaust the gap between the middle pipe and the first pipe

D6: Exhaust the gap between the second pipe and the middle pipe

D7: The gap between the protective pipe and the second pipe is exhausted.