CN114727873A

CN114727873A - Interventional instrument delivery system driven by hydraulic mode

Info

Publication number: CN114727873A
Application number: CN202080071268.8A
Authority: CN
Inventors: 雷荣军; 王翔; 王媛茹; 郭烽; 黄杭栋; 陈锐
Original assignee: Hangzhou Qiming Medical Devices Co ltd
Current assignee: Hangzhou Qiming Medical Devices Co ltd
Priority date: 2019-10-31
Filing date: 2020-10-29
Publication date: 2022-07-08
Also published as: WO2021083294A1; CN114667118A; WO2021083295A1; CN112741945A; CN220424025U; CN220344551U; CN215960481U; CN220344552U; CN112741945B; CN215192642U; CN215228888U; CN112741712A; CN112741712B; CN220344550U

Abstract

A hydraulically-driven interventional device conveying system comprises a plurality of pipe fittings (1) and a control handle (2), wherein the pipe fittings (1) are coaxially arranged from inside to outside, the control handle (2) drives the pipe fittings (1) to move relatively, the far ends of the pipe fittings (1) are used for operating interventional devices in a mutual matching mode, the near ends of the pipe fittings (1) are connected to the control handle (2), and the pipe fittings (1) are driven to move relatively in a hydraulic mode at the control handle (2); control handle (2) are equipped with one or more hydraulic pressure chamber, and each hydraulic pressure intracavity slidable mounting has the piston respectively, still disposes the hydraulic drive return circuit that is used for through each pipe fitting of piston drive (1) relative motion in control handle (2) department, and the hydraulic drive return circuit includes: a hydraulic line (33) for providing a liquid passage communicating with each hydraulic chamber; a drive pump (5) communicating with the hydraulic line (33) for driving the liquid flow; a control valve in communication with the hydraulic line (33) for controlling fluid flow. The hydraulically-driven interventional instrument conveying system adopts a hydraulic driving mode, is convenient and quick to use, and can switch different functions through a hydraulic driving loop.

Description

Interventional instrument delivery system driven by hydraulic mode

Technical Field

The present application relates to the field of medical devices, and in particular to delivery systems for delivering interventional devices into the body.

Background

The interventional device delivery system generally includes a control handle disposed at a proximal end, i.e., at an operator's side, a plurality of elongated tubes slidably nested inside and outside, a proximal end of each tube being a control end and connected to the control handle, a distal end of each tube being a working end and being interjectable in a body and cooperating with each other to complete delivery, release, or retrieval, etc. of the interventional device, and the control handle generally may be provided with a sliding or rotating member to drive relative axial movement between the tubes. Most of existing control handles are regulated and controlled in a mechanical mode, more requirements are provided for functions of an interventional instrument along with development of the interventional instrument, for example, functions of valve release, valve recovery, valve bending and the like of a conveying system are realized, different functional modules are usually realized by independent driving modules, transmission of the control handles is relatively complex, the whole size is large, and operation of an operation is not facilitated.

Disclosure of Invention

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

A hydraulic-driven interventional device conveying system comprises a plurality of pipe fittings coaxially arranged from inside to outside and a control handle for driving the pipe fittings to move relatively, wherein the far ends of the pipe fittings are used for operating interventional devices in a mutually matched mode, the near ends of the pipe fittings are connected to the control handle, and the control handle drives the pipe fittings to move relatively in a hydraulic mode;

the brake valve is characterized in that the control handle is provided with one or more hydraulic cavities, pistons are respectively installed in the hydraulic cavities in a sliding mode, a hydraulic driving circuit used for driving the pipe fittings to move relatively through the pistons is further configured at the control handle, and the hydraulic driving circuit comprises:

the hydraulic pipeline is used for providing a liquid channel communicated with each hydraulic cavity;

a drive pump in communication with the hydraulic line for driving fluid flow;

and the control valve is communicated with the hydraulic pipeline and used for controlling the flow direction of the liquid.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the two pipes adjacent to each other in the radial direction include an outer pipe and an inner pipe, the outer pipe enters one of the hydraulic chambers and is fixed to the piston in the hydraulic chamber, and the inner pipe extends to be connected to the pistons of the other hydraulic chambers or is fixed to the control handle.

Optionally, the hydraulic drive circuit further comprises a liquid storage tank communicated with the hydraulic pipeline for temporarily storing liquid.

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

Optionally, a liquid injection connector is mounted on the control handle, and the liquid injection connector is communicated with the liquid injection port through the driving pump and is used for injecting liquid into the liquid storage tank.

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

Optionally, the control valve comprises:

the multi-way switching valve is provided with a driving side interface communicated with the inlet and the outlet of the driving pump and a plurality of working side interfaces, wherein every two working side interfaces are communicated with one of the hydraulic cavities, and the multi-way switching valve is provided with a plurality of gears and used for switching the communication relation between the driving side interfaces and different working side interfaces so as to control the flow direction of liquid.

Optionally, the control valve further comprises:

the outlet of the driving pump is communicated to one of the driving side interfaces through the first one-way valve; an inlet of the driving pump is communicated to the other driving side interface through a second one-way valve and a liquid storage tank in sequence;

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

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

Optionally, a first piston is slidably mounted in the first hydraulic cavity, the first piston divides the first hydraulic cavity into a first chamber and a second chamber, and the first chamber and the second chamber are connected to the hydraulic drive circuit through corresponding communication ports.

Optionally, the multi-way switching valve is set to one of the following forms:

(a) the switching valve of leading to more is total four interfaces, wherein two are the drive side interface, be linked together with the play of driving pump, the entry respectively, two other interfaces of the switching valve of leading to more are the working side interface, inside many runners through on the case of the switching valve of leading to more communicates corresponding drive side interface and working side interface, many pipes include by interior and the first pipe fitting and the second pipe fitting that set gradually outward, can divide into D1 ~ D2 gear based on the communicating relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: the first piston moving towards the near end

(b) The multi-way switching valve is provided with four interfaces, two of the interfaces are driving side interfaces and are respectively communicated with an outlet and an inlet of the driving pump, the other two interfaces of the multi-way switching valve are working side interfaces, the multi-way switching valve is internally communicated with the corresponding driving side interfaces and the working side interfaces through a plurality of flow channels on the valve core, the plurality of pipe fittings comprise a first pipe fitting and a second pipe fitting which are sequentially arranged from inside to outside, the multi-way switching valve can be divided into D1-D3 gears based on different communication relations, and each gear realizes the following functions:

d1: distal movement of the first piston

D2: proximal movement of the first piston

D3: gap exhaust of second pipe fitting and first pipe fitting

(b) The total five interfaces of many-way diverter valve, wherein two are the drive side interface, respectively with the play of driving pump, the entry is linked together many-way diverter valve other three interface and is the work side interface, many-way diverter valve is inside to communicate corresponding drive side interface and work side interface through many runners on the case, many pipes include by interior and first pipe fitting and the second pipe fitting that sets gradually outward, the outside cover of second pipe fitting is still equipped with the protection tube, can divide into D1 ~ D4 gear based on the communicating relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: proximal movement of the first piston

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

D4: and exhausting the gas from the gap between the protection pipe and the second pipe fitting.

Optionally, a first cylinder and a second cylinder are installed in the control handle, a first hydraulic cavity is formed inside the first cylinder, a second hydraulic cavity is formed inside the second cylinder, two working side interfaces of the multi-way switching valve are communicated with the first hydraulic cavity, and the other two working side interfaces are communicated with the second hydraulic cavity.

Optionally, a first piston is slidably mounted in the first hydraulic cavity, a second piston is slidably mounted in the second hydraulic cavity, the first piston divides the first hydraulic cavity into a first cavity and a second cavity, the second piston divides the second hydraulic cavity into a third cavity and a fourth cavity, and the cavities are connected into the hydraulic drive loop through corresponding communicating ports.

Optionally, the multi-way switching valve is set to one of the following forms:

(a) the total six interfaces of many-way diverter valve, wherein two are the drive side interface, respectively with the play of driving pump, the entry is linked together, four other interfaces of many-way diverter valve are the working side interface, inside many runners through on the case of many-way diverter valve communicates corresponding drive side interface and working side interface, many pipes include by interior and the first pipe fitting that sets gradually outward, middle pipe fitting and second pipe fitting, can divide into D1 ~ D4 gear based on the communicating relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: proximal movement of the first piston

D3: distal movement of the second piston

D4: the second piston moving towards the near end

(b) The total six interfaces of many-way diverter valve, wherein two are the drive side interface, respectively with the play of driving pump, the entry is linked together, four other interfaces of many-way diverter valve are the working side interface, inside many runners through on the case of many-way diverter valve communicates corresponding drive side interface and working side interface, many pipes include by interior and the first pipe fitting that sets gradually outward, middle pipe fitting and second pipe fitting, can divide into D1 ~ D6 gear based on the communicating relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: proximal movement of the first piston

D3: distal movement of the second piston

D4: the second piston moving towards the near end

D5: gap exhaust of intermediate pipe and first pipe

D6: gap exhaust of second pipe fitting and middle pipe fitting

(c) The switching valve of leading to more has seven interfaces altogether, wherein two are the drive side interface, respectively with the play of driving pump, the entry is linked together, five other interfaces of the switching valve of leading to more are the working side interface, inside many runners through on the case of the switching valve of leading to more communicates corresponding drive side interface and working side interface, many pipes include by interior and the first pipe fitting that sets gradually outward, middle pipe fitting and second pipe fitting, the outside cover of second pipe fitting is still equipped with the protection tube, can divide into D1 ~ D7 gear based on the intercommunication relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: proximal movement of the first piston

D3: distal movement of the second piston

D4: the second piston moving towards the near end

D5: gap exhaust of intermediate pipe and first pipe

D6: gap exhaust of second pipe fitting and middle pipe fitting

D7: and the gap between the protection pipe and the second pipe fitting is exhausted.

Optionally, the control handle is provided with one or more hydraulic chambers, each hydraulic chamber is internally provided with a piston in a sliding manner, and two adjacent pipe fittings at radial upper positions in the plurality of pipe fittings correspond to one of the hydraulic chambers;

optionally, each piston comprises:

the fixed sealing part is sleeved on the outer-layer pipe fitting and is in fixed sealing fit with the outer wall of the outer-layer pipe fitting;

the sliding sealing part is sleeved on the inner-layer pipe fitting and is in sliding sealing fit with the outer wall of the inner-layer pipe fitting;

the fixed sealing part is fixedly connected with the sliding sealing part, and at least one of the fixed sealing part and the sliding sealing part is in sliding sealing fit with the inner wall of the hydraulic cavity. Optionally, a radial gap between two adjacent pipe fittings in a radial position is an exhaust gap, and a hydraulic drive circuit for driving the pipe fittings to move relatively through the piston is further configured at the control handle, and the hydraulic drive circuit is further communicated with the exhaust gap to perform exhaust.

Optionally, a balance hole is formed in the piston, and a balance valve core is installed at the balance hole; the piston is also provided with an exhaust hole communicated with the exhaust gap, and the exhaust hole is positioned between the fixed sealing part and the sliding sealing part;

the piston divides the hydraulic cavity into two chambers, and when the pressure in the two chambers approaches, the balance valve core is opened to communicate the two chambers and the exhaust hole.

Optionally, many pipe fittings include from inside to outside slip nested first pipe fitting and second pipe fitting in proper order, the distal end of first pipe fitting is used for placing intervention apparatus, and during two pipe fittings relative motion, the distal end parcel of second pipe fitting or release intervention apparatus.

Optionally, the plurality of pipe fittings include a first pipe fitting, an intermediate pipe fitting and a second pipe fitting which are sequentially arranged from inside to outside, the distal end of the first pipe fitting is used for placing an intervention instrument, the distal end of the intermediate pipe fitting is fixedly connected to the first pipe fitting for traction and bending adjustment, or the distal end of the intermediate pipe fitting is provided with a locking piece for limiting the intervention instrument on the first pipe fitting, and the distal end of the second pipe fitting is used for wrapping or releasing the intervention instrument; the hydraulic cavity is a first hydraulic cavity and a second hydraulic cavity; the piston is a first piston which is installed in the first hydraulic cavity in a sliding mode and a second piston which is installed in the second hydraulic cavity in a sliding mode.

Optionally, the distal end of the catheter system is provided with a hydraulic chamber for driving the release of the interventional instrument; a piston is arranged in the hydraulic cavity in a sliding manner, and the far end of the piston is detachably connected with an interventional instrument.

Optionally, the hydraulic chamber is a first hydraulic chamber; the piston is a first piston which is slidably mounted in the first hydraulic cavity, the near end of the second pipe fitting penetrates into the first hydraulic cavity and is fixedly connected with the first piston, and the near end of the first pipe fitting penetrates out of the first piston through the second pipe fitting and then further extends until the near end of the first pipe fitting is fixedly connected with the control handle.

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

Optionally, the hydraulic driving circuit is configured on the control handle and configured to drive the first piston to move the pipe fittings relatively.

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

Optionally, the control handle surrounds the first cylinder, and a positioning part matched with the first cylinder is arranged on the control handle.

Optionally, the control handle comprises a working portion for providing the first hydraulic chamber and a holding portion connected to the working portion, the working portion having opposite distal and proximal ends, the second tube extending from the distal end of the working portion into the first hydraulic chamber, the first tube extending and being connected to the proximal end of the working portion.

Optionally, the grip portion is connected to a proximal end of the working portion.

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

Optionally, the drive pump includes:

a pump housing secured to the control handle and accessing the hydraulic drive circuit;

a working element movably mounted in the pump housing for driving the flow of fluid;

and the driving piece is movably arranged on the control handle and is linked with the work piece.

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

Optionally, the hand piece is slidably or rotatably mounted to an operating knob of the control handle.

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

Optionally, the drive pump further comprises a reset member acting between the drive member and the control handle.

Optionally, the control handle includes a working portion for providing the hydraulic chamber and a holding portion connected to the working portion, and the operation knob is mounted on the holding portion.

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

Optionally, the drive pump and/or reservoir is located outside the control handle.

Optionally, the first piston comprises:

the fixed sealing part is sleeved on the second pipe fitting and is in fixed sealing fit with the outer wall of the second pipe fitting;

the sliding sealing part is sleeved on the first pipe fitting and is in sliding sealing fit 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 the fixed sealing part and the sliding sealing part is in sliding sealing fit with the inner wall of the first hydraulic cavity.

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

the fixed sealing part and the sliding sealing part are mutually fixed through a connecting sleeve.

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

Optionally, an air gap communicated with the exhaust hole is reserved between the outer wall of the connecting sleeve and the inner wall of the first hydraulic cavity, and the axial position of the air gap is located between the fixed sealing part and the sliding sealing part;

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

the fixed sealing part and the sliding sealing part are respectively provided with a through hole, a balance valve core is arranged at the through hole, and when the pressure in the first cavity and the pressure in the second cavity approach, the balance valve core is opened to enable the first cavity, the second cavity and the air passing gap to be communicated.

Optionally, the fixed sealing part and the sliding sealing part respectively comprise a support frame and a sealing sleeve wrapping the outside of the support frame, and the connecting sleeve is fixed between the two support frames.

Optionally, each support frame and each seal sleeve are provided with a through hole through which the first pipe fitting or the second pipe fitting passes, the through holes are in sealing fit with the passing parts, and the periphery of each seal sleeve is in sliding sealing fit with the inner wall of the first hydraulic cavity.

Optionally, the proximal end of the second pipe passes through the connecting sleeve and then is fixed to the support frame in the sliding seal portion, and an adaptive exhaust hole matched with the exhaust hole in position is formed in the pipe wall of the second pipe.

Optionally, the proximal end of the second tube is secured to a cage in the fixed seal.

Optionally, an intermediate pipe is further coupled between the first pipe and the second pipe, a second hydraulic cavity communicated with the hydraulic drive circuit is arranged inside the control handle, and a second piston is arranged in the second hydraulic cavity;

the proximal end of the middle pipe fitting penetrates out of the first piston through the second pipe fitting, further extends into the second hydraulic cavity and is fixedly connected to the second piston;

the near end of the first pipe fitting penetrates out of the second piston through the middle pipe fitting and then further extends until the near end of the first pipe fitting is fixedly connected with the control handle;

the far end of the middle pipe fitting is fixedly connected to the first pipe fitting and used for traction bending adjustment, or a locking piece for limiting an interventional instrument on the first pipe fitting is arranged at the far end of the middle pipe fitting.

The middle pipe fitting can be used as a bend adjusting pipe;

the middle pipe fitting can also be used as a stay wire pipe;

only one multi-way switching valve and one driving pump are needed to control different hydraulic cavities, and the system structure is simplified.

Optionally, the second piston divides the second hydraulic cavity into a third cavity and a fourth cavity, each cavity is connected to the hydraulic drive circuit through a corresponding connecting port, the proximal end of the middle pipe penetrates into the third cavity and is fixedly connected to the second piston, and the proximal end of the first pipe penetrates out of the second piston through the middle pipe and then extends out of the second hydraulic cavity through the fourth cavity.

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

Optionally, the control handle surrounds the second cylinder, and a positioning component matched with the second cylinder is arranged on the control handle.

Optionally, a first cylinder is fixedly mounted on the control handle, and the first hydraulic cavity is formed inside the first cylinder;

the control handle is fixedly provided with a second cylinder barrel, and the second hydraulic cavity is arranged inside the second cylinder barrel;

the first cylinder barrel and the second cylinder barrel are coaxially and sequentially arranged from the far end to the near end.

Optionally, the first cylinder and the second cylinder are butted with each other, an isolation sealing element is disposed at the butted position, and a through hole allowing the intermediate pipe to pass through in a sealing and sliding manner is formed in the isolation sealing element.

Optionally, a hydraulic driving circuit for driving the pipe fittings to move relatively through the piston is further configured at the control handle; the hydraulic drive circuit includes:

a hydraulic line for providing a fluid passage;

a drive pump in communication with the hydraulic line for driving fluid flow;

the multi-way switching valve is provided with a driving side interface communicated with the inlet and the outlet of the driving pump and a plurality of working side interfaces, wherein two working side interfaces are communicated with the first hydraulic cavity, and the other two working side interfaces are communicated with the second hydraulic cavity;

the multi-way switching valve is provided with a plurality of gears and used for switching the communication relation between the driving side interface and different working side interfaces so as to control the flow direction of liquid.

Optionally, the first piston comprises:

the sliding sealing part is sleeved on the first pipe fitting and is in sliding sealing fit with the outer wall of the middle pipe fitting;

the second piston includes:

the fixed sealing part is sleeved on the middle pipe fitting and is in fixed sealing fit with the outer wall of the middle pipe fitting;

in the same piston, the fixed sealing part and the sliding sealing part are fixedly connected, and at least one of the fixed sealing part and the sliding sealing part is in sliding sealing fit with the inner wall of the hydraulic cavity where the fixed sealing part and the sliding sealing part are located.

Optionally, in the same piston, the fixed sealing part and the sliding sealing part are in sliding sealing fit with the inner wall of the hydraulic cavity; the fixed sealing part and the sliding sealing part are mutually fixed through a connecting sleeve.

Optionally, a radial gap between the second pipe fitting and the middle pipe fitting is a first exhaust gap, and a side wall of a connecting sleeve in the first piston is provided with a first exhaust hole communicated with the first exhaust gap;

the radial clearance of the middle pipe fitting and the first pipe fitting is a second exhaust clearance, and a second exhaust hole communicated with the second exhaust clearance is formed in the side wall of the connecting sleeve in the second piston.

Optionally, a first air passing gap communicated with the first exhaust hole is reserved between the outer wall of the connecting sleeve in the first piston and the inner wall of the first hydraulic cavity, and the axial position of the first air passing gap is located between the fixed sealing part and the sliding sealing part of the first piston;

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

balance holes are respectively formed in the fixed sealing portion and the sliding sealing portion of the first piston, a balance valve core is installed at the balance holes, and when the pressure in the first cavity and the pressure in the second cavity approach, the balance valve core is opened to enable the first cavity, the second cavity and the first air passing gap to be communicated with each other.

Optionally, in the same piston, the fixed sealing part and the sliding sealing part both comprise a support frame and a seal sleeve wrapping the outside of the support frame, and the connecting sleeve is fixed between the two support frames.

Optionally, each support frame and each sealing sleeve are provided with a through hole for the first pipe fitting, the middle pipe fitting or the first pipe fitting to pass through, the through holes are in sealing fit with the passing part, and the periphery of each sealing sleeve is in sliding sealing fit with the inner wall of the hydraulic cavity where the sealing sleeve is located.

Optionally, the proximal end of the second pipe passes through the connecting sleeve of the first piston and then is fixed to the support frame in the sliding seal portion of the first piston, and the pipe wall of the second pipe is provided with an adaptive exhaust hole matched with the first exhaust hole in position.

Optionally, the proximal end of the second tube is secured to a support cage in the fixed seal of the first piston.

Optionally, a second air passing gap communicated with the second air vent is reserved between the outer wall of the connecting sleeve in the second piston and the inner wall of the second hydraulic cavity, and the axial position of the second air passing gap is located between the fixed sealing part and the sliding sealing part of the second piston;

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

and when the pressure in the third chamber and the fourth chamber approaches, the balance valve core is opened to communicate the third chamber, the fourth chamber and the second air passing gap.

Optionally, the proximal end of the middle pipe fitting penetrates through a connecting sleeve of the second piston and then is fixed to a support frame in a sliding sealing part of the second piston, and an adaptive exhaust hole matched with the second exhaust hole in position is formed in the pipe wall of the middle pipe fitting.

Optionally, the proximal end of the intermediate tube is secured to a support cage in the fixed seal of the second piston.

Optionally, the balance hole is formed in the seal sleeve, and the support frame is provided with an avoidance groove for the balance valve element to penetrate through.

Optionally, the support frame includes:

the annular part is butted with the axial end of the connecting sleeve;

the supporting disk is fixed on the periphery of the annular portion, and the sealing sleeve wraps the supporting disk.

Optionally, the support disc is a disc with a frame structure.

Optionally, the balanced valve cartridge includes:

the linkage rod penetrates through the balance holes in the fixed sealing part and the sliding sealing part in a sliding mode and is in clearance fit with the penetrating parts;

and the two sealing heads are respectively fixed at two ends of the linkage rod and correspondingly close or open the balance holes under the action of lateral pressure of the piston.

Optionally, the sealing head is spherical, recessed areas located on the periphery of the balance hole are respectively arranged on the opposite sides of the fixed sealing part and the sliding sealing part, and the sealing head is attached to the recessed areas when the balance hole is closed.

Optionally, the outside of second pipe fitting still overlaps and is equipped with the protection tube, the near-end of protection tube with control handle is fixed mutually.

Optionally, a fixed sleeve is installed on the control handle, the proximal end of the protection tube is in sealed butt joint with the distal end of the fixed sleeve, and the proximal end of the second pipe passes through the protection tube and penetrates out of the fixed sleeve and then further extends into the first hydraulic cavity.

Optionally, the proximal end of the fixing sleeve is in sliding seal fit with the outer wall of the second pipe fitting, a radial gap between the protection tube and the second pipe fitting is a third exhaust gap, and a third exhaust hole communicated with the third exhaust gap is formed in the side wall of the fixing sleeve.

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

Optionally, the hydraulic drive circuit comprises:

a hydraulic line for providing a fluid passage;

a drive pump in communication with the hydraulic line for driving fluid flow;

the multi-way switching valve is provided with a driving side interface communicated with the inlet and the outlet of the driving pump and a plurality of working side interfaces, wherein two working side interfaces are communicated with the first hydraulic cavity, and one working side interface is communicated with the third exhaust hole;

the multi-way switching valve is provided with a plurality of gears and is used for switching the communication relation between the driving side interface and the different working side interfaces so as to control the flow direction of liquid.

Optionally, be equipped with the installation head that is used for connecting the intervention apparatus on the first pipe fitting, be equipped with the lockhole on the installation head, the distal end of middle pipe fitting is fixed with the latch fitting, the latch fitting inserts under the locking state the lockhole, the self of intervention apparatus or tie up through the haulage cable and tie up on the latch fitting, the latch fitting breaks away from under the state of releasing the lock the lockhole is in order to release the intervention apparatus.

Optionally, the latch fitting is shaft-like, the inside of middle pipe fitting is fixed with the connecting seat, the near-end of latch fitting is inserted and is established and be fixed in the connecting seat, the distal end of latch fitting through the axial motion along with middle pipe fitting with the lockhole is mutually supported.

Optionally, the locking piece is a plurality of straight rods arranged side by side.

The hydraulically driven interventional instrument conveying system adopts a hydraulic driving mode, is convenient and quick to use, and can also switch different functions through a hydraulic driving loop.

Drawings

FIG. 1 is a schematic diagram of an embodiment of an interventional instrument delivery system according to the present application;

FIG. 2a is a schematic view of a distal portion of the interventional instrument delivery system of the present application;

FIG. 2b is a schematic structural view of an interventional instrument used in an embodiment of the present application;

FIG. 2c is a schematic structural view of an interventional instrument used in another embodiment of the present application;

FIG. 2d is a schematic structural view of the loaded state of the interventional instrument;

FIG. 2e is a schematic structural view of the interventional instrument in a semi-released state;

FIG. 2f is a schematic structural view of the released state of the interventional instrument;

FIG. 3 is a schematic view of a proximal end portion of an interventional instrument delivery system of the present application;

FIG. 4 is a schematic illustration of the internal construction of the interventional instrument delivery system of FIG. 3 (with a portion of the housing hidden);

FIG. 5 is a schematic view of the internal structure of another embodiment of the interventional instrument delivery system of the present application;

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

FIG. 7 is a schematic view of the distal portion of the interventional instrument delivery system of FIG. 5;

FIG. 8 is a schematic view of the internal structure of the feeding system of the feeding instrument of FIG. 5 without two cylinders;

FIG. 9 is a schematic view of the transfer system of the insertion instrument of FIG. 8 showing a change in position of the two pistons;

FIG. 10 is a schematic view of two cylinders in an embodiment of the present invention;

FIG. 11 is a schematic view of another angle of the two cylinders in FIG. 10;

FIG. 12 is an exploded view of the two cylinders of FIG. 10 (with the addition of a component retainer sleeve);

FIG. 13 is a side view of the two cylinders of FIG. 10;

FIG. 14 is a cross-sectional view A-A of FIG. 13;

FIG. 15 is a schematic view of a fluid reservoir in an embodiment of the interventional instrument delivery system of the present application;

FIG. 16 is a schematic view of a portion of a drive pump in an embodiment of the interventional instrument delivery system of the present application;

FIG. 17 is a schematic view of the pump casing structure of the drive pump of FIG. 16;

FIG. 18 is a schematic diagram of a work element of the drive pump of FIG. 16;

FIG. 19 is a schematic view of a multi-way switching valve in an embodiment of an interventional instrument delivery system of the present application;

FIG. 20 is an exploded view of the multiple-way switching valve of FIG. 19;

FIG. 21 is a schematic view of the multi-way selector valve of FIG. 19 mounted to a control handle;

FIG. 22 is a schematic view of a valve cartridge of the multi-way switching valve of FIG. 19;

FIG. 23 is a schematic view of another angular configuration of the valve cartridge of FIG. 22;

FIG. 24 is a schematic view of another angle structure of the multi-way switching valve of FIG. 19;

FIG. 25 is a schematic view of a fixation sheath according to an embodiment of the present invention for use in a delivery system of an interventional instrument;

fig. 26 is a schematic view of the holster of fig. 25 at another angle;

FIG. 27 is a cross-sectional view of a site of a fixation sheath according to an embodiment of the interventional instrument delivery system of the present application;

FIG. 28 is a cross-sectional view of a first piston portion of an embodiment of an interventional instrument delivery system of the present application;

FIG. 29 is a cross-sectional view of a second piston portion of an embodiment of an interventional instrument delivery system of the present application;

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

FIG. 31 is a schematic view of a first piston of an embodiment of the interventional instrument delivery system of the present application;

FIG. 32 is a schematic view of an alternate angular configuration of the first piston of FIG. 31;

FIG. 33 is an exploded view of the first piston of FIG. 31;

FIG. 34 is a schematic view of the first piston of FIG. 31 without the sealing sleeve;

FIG. 35 is another angular configuration of the first piston of FIG. 34 with the sealing boot omitted;

FIG. 36 is a schematic illustration of hydraulic operation in an embodiment of an interventional instrument delivery system of the present application;

FIG. 37 is an enlarged view of portion D1 of FIG. 36;

FIG. 38 is a schematic illustration of hydraulic operation in another embodiment of an interventional instrument delivery system of the present application;

FIG. 39 is a schematic illustration of the hydraulic operation of another embodiment of the interventional instrument delivery system of the present application;

FIG. 40 is a schematic view of a distal portion of an embodiment of an interventional instrument delivery system of the present application;

figure 41 is a schematic view of the lock of figure 40 in a locked condition;

FIG. 42 is a schematic illustration of the lock of FIG. 41 in a released condition;

FIG. 43 is the schematic illustration of FIG. 42 with the intermediate tubular member omitted;

FIG. 44 is a schematic view of a distal portion (with the lock in a locked state) of another embodiment of an interventional instrument delivery system of the present application;

FIG. 45 is a schematic view of the lock of FIG. 44 in a released condition;

FIG. 46 is the schematic illustration of FIG. 45 with the intermediate tubular member omitted;

FIG. 47 is a schematic view of a distal portion of another embodiment of an interventional instrument delivery system of the present application;

figure 48 is a schematic illustration of the latch of figure 47 in a latched condition;

FIG. 49 is a schematic illustration of the lock of FIG. 48 in a unlocked condition;

fig. 50 is a schematic view of fig. 49 with the intermediate pipe omitted.

The reference numerals in the figures are illustrated as follows:

1. a pipe fitting;

11. a first pipe member; 111. a guide head; 112. a mounting head; 113. a pipe joint; 114. fastening sleeves; 115. a lock hole; 116. threading holes; 117. positioning the clamping groove; 118. positioning the projection; 119. an auxiliary component; 12. a second pipe member; 121. a loading section; 122. fastening sleeves; 13. an intermediate pipe; 131. a lock; 132. a connecting seat; 133. fastening sleeves; 134. binding wires; 135. a wire loop; 14. protecting the tube;

2. a control handle;

21. a working part; 211. a distal end; 212. a proximal end; 22. a holding portion; 23. a positioning member; 24. a first half shell; 25. a second half shell; 26. a positioning column;

3. a cylinder barrel;

31. a first cylinder; 311. a first hydraulic chamber; 312. a first chamber; 313. a second chamber; 314. a communication port; 315. a communication port; 32. a second cylinder; 321. a second hydraulic chamber; 322. a third chamber; 323. a fourth chamber; 324. a communication port; 325. a communication port; 33. a hydraulic line; 331. a first check valve; 332. a second one-way valve; 34. an isolation seal; 35. a distal sealing plug; 36. a proximal end sealing plug;

4. a first piston;

41. a fixed seal portion; 42. a sliding seal portion; 43. connecting sleeves; 431. a first air passing gap; 432. reinforcing ribs; 44. a support frame; 441. an avoidance groove; 45. sealing sleeves; 451. a recessed region; 46. a first exhaust port; 47. a balance hole; 48. a balanced valve core; 481. a linkage rod; 482. a sealing head; 49. a through hole;

5. driving the pump;

51. a pump housing; 52. a working element; 53. a drive member; 531. a shaft hole; 54. an inlet; 55. an outlet; 56. a transfer port; 57. A pump chamber;

6. a multi-way switching valve;

61. a valve seat; 62. a valve core; 63. a wrench; 64. identifying; 65. an interface; 66. a flow channel; 67. a drive side interface; 68. a working side interface;

7. a liquid storage tank;

71. a liquid injection port; 72. a liquid injection joint; 73. an inlet; 74. an outlet;

8. fixing a sleeve;

81. a through hole; 82. a third exhaust hole; 83. positioning a groove; 84. a receiving cavity;

9. a second piston;

91. a fixed seal portion; 92. a sliding seal portion;

10. a support;

101. and (5) connecting lugs.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

It should be noted that the terms "proximal" and "distal" are used relative to the operator. For example, in reference to a catheter or sheath, the term "proximal" refers to the end of the body distal from the lesion (e.g., the end of the catheter connected to the control handle) that is proximal to the operator, i.e., into the body when used, and the term "distal" refers to the end proximal to the lesion (e.g., at the end of the catheter) that is distal from the operator, i.e., into the body when used. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The delivery system may be used to treat a heart valve (e.g., 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 procedures that affect valve function. The systems and methods can employ transcatheter approaches, such as delivery of a catheter system via a venous or femoral approach; or other minimally invasive surgical approaches including, but not limited to, trans-apical approach delivery catheters.

Referring to fig. 1, the interventional device delivery system according to one embodiment of the present application includes a catheter system, the catheter system includes a plurality of tubes 1 coaxially arranged from inside to outside, and a control handle 2 for driving the plurality of tubes 1 to move relatively, distal ends of the tubes are used for operating the interventional device in cooperation with each other, proximal ends of the tubes are connected to the control handle 2, and the control handle 2 hydraulically drives the tubes to move relatively.

According to the hydraulic control system, the control handle is used for driving the pipe fittings in a hydraulic mode to realize the operation of the interventional instrument, such as releasing, cutting, rotating, grabbing or recovering and the like, the whole hydraulic system is configured at the near end, so that the on-site debugging or assembly is more convenient, the in-vitro solution is also convenient even if unexpected conditions occur, and if the hydraulic mechanism is configured at the far end, the harsh requirements on the volume and the safety of equipment are provided, and the adjustable movement form and direction are also limited due to the equipment problems.

The plurality of pipe fittings is understood to be at least two, specifically, any two pipe fittings are in sliding fit, that is, all parts between the two pipe fittings are provided with axial relative displacement during movement, and of course, if a deformable connecting piece is additionally arranged between the two pipe fittings, the relative movement relationship of the connecting piece is considered.

It is also possible to use a fixed connection (for example, a fixed connection at the distal end portion) locally between two tubes, for example, two tubes which are adjacent in the radial direction, and since the two tubes are fixed to each other only at the distal end portion, a small amount of relative displacement between the two tubes can be allowed at the proximal end portion, and of course, such a relative movement can be transmitted to the distal end portion to cause one of the two tubes to deform and bend, and the bending of the distal end of one tube can be achieved by using this feature.

The number of tubes 1 may be two, three or more, and the relative movement of the different tubes 1 may effect corresponding manipulation of the interventional instrument, e.g. delivery, release, attitude adjustment, retrieval, etc., at the distal end (distal to the operator, i.e. the end of the body closer to the lesion in use, and correspondingly proximal and vice versa), and may be performed in accordance with conventional techniques with respect to the implementation of the respective tubes 1 themselves and the distal functions, although improvements relating to the structure of the distal end of the tubes are also provided below. One of the key points of the application is that the operating handle is driven by liquid to drive the relative motion of different pipe fittings.

Referring to fig. 2a, in one embodiment, the multiple tubes include a first tube 11 and a second tube 12 which are slidably nested from inside to outside, a distal end of the first tube 11 is used for placing an interventional device, and when the two tubes move relatively, a distal end of the second tube 12 wraps or releases the interventional device. The proximal end of the second tube 12 may be externally sleeved with a protective tube (not shown in fig. 1 and 2 a) fixedly connected to the control handle.

At the distal most end of the first tube member 11 is a guide head 111, and adjacent to the proximal end of the guide head 111 is also fixed a mounting head 112, and when the interventional device is loaded, the interventional device is located between the guide head 111 and the mounting head 112 and is radially compressed, and the interventional device is generally provided with a coupling lug, and the outer wall of the mounting head is generally provided with a recess or a protrusion for cooperating with the coupling lug of the interventional device, and when the interventional device is loaded, the coupling lug is engaged with the recess of the mounting head 112 or hung on the protrusion to limit the axial position of the interventional device, and as for a further fixing manner of the coupling lug and the mounting head, reference may be made to WO2019080857a1 patent.

Referring to fig. 2b and 2C, the interventional device according to the present application is not limited in terms of the specific shape, and may include, for example, a stent 10 having a coupling lug 101 at one axial end of the stent 10, the coupling lug 101 may be a distal end with an expansion head, or may have a ring-shaped or C-shaped coupling portion.

The stent 10 is a radially compressible or expandable structure, typically a mesh tubular structure formed by cutting or braiding.

Referring to fig. 2 d-2 f, the distal end of the second tube 12 is a loading section 121, the interventional device is radially compressed in the loading state, the loading section 121 is wrapped on the periphery of the interventional device to limit radial expansion of the interventional device, the interventional device is driven by the control handle to axially slide and retract relative to the first tube 11 after being in place, so that the interventional device is gradually exposed in the body vessel to allow the interventional device to radially expand, the interventional device enters a semi-release state from the expansion of the distal end, the interventional device is completely exposed along with the further retraction of the second tube 12, and finally, the connecting lug of the interventional device is separated from the mounting head to enter the release state, so that the release of the interventional device is completed. The relative axial sliding of the first tubular element 11 and the second tubular element 12 is driven by the control handle 2 during the whole process.

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

Referring to fig. 3 and 4, the control handle 2 is provided with a hydraulic chamber, i.e. a first hydraulic chamber 311, two pipes which are adjacent in the radial direction are respectively a first pipe 11 and a second pipe 12 which is sleeved outside the first pipe 11, the second pipe 12 which is positioned at the outer layer enters the first hydraulic chamber 311 and is fixed with the first piston 4 in the first hydraulic chamber 311, and the first pipe 11 which is positioned at the inner layer extends out of the first hydraulic chamber 311 and is fixed on the control handle 2.

The shape of the control handle 2 is not strictly limited, and a split structure may be adopted to facilitate packaging other components, that is, the control handle 2 includes the first half-shell 24 and the second half-shell 25 which are fastened to each other, but may be divided into more parts to facilitate local maintenance or operation.

In order to facilitate the mutual fixation between the first half-shell 24 and the second half-shell 25, various ways of fasteners and buckles can be adopted, in this embodiment, at least one of the first half-shell 24 and the second half-shell 25 is provided with a positioning column 26, the positioning column 26 is provided with a screw hole, the other one is correspondingly provided with a mounting hole for penetrating a bolt, and the two are fixed by the bolt;

or both the positioning columns are provided with positioning columns 26 and matched in position, the positioning column of one is provided with a positioning hole, and the positioning column of the other is directly clamped into the positioning hole corresponding to the position.

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

In different embodiments, the hydraulic chamber is directly opened inside the control handle 2, or the control handle 2 is fixedly provided with the cylinder barrel 3, and the inside of the cylinder barrel 3 is the hydraulic chamber. The cross section of the cylinder 3 is not critical, but preferably the outer periphery is defined by a smooth curve, such as a circle or an ellipse, taking the case where the cross section is circular, which is seen as a cylinder as a whole.

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

In order to protect the first cylinder 31, the first and second half-

shells

24, 25 enclose the first cylinder 31 in a snap-fit manner, and in the preferred embodiment, a positioning part 23 is provided on the control handle 2, which cooperates with the first cylinder 31. For example, fig. 4 shows that the positioning component 23 is one or more positioning steps, and the shape of the positioning steps 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 convenience of operation, the control handle 2 includes a working portion 21 and a grip portion 22 connected to the working portion 21 in a preferred embodiment. The first cylinder 31 is located in the working portion 21, i.e., the working portion 21 as a whole for providing a first hydraulic chamber 311, the working portion 21 having opposite distal and proximal ends 211 and 212.

Adopt integrated into one piece structure between work portion 21 and the portion of holding 22, or detachable connection to less volume is convenient for accomodate, and the mode such as buckle or screw thread can be adopted in the connection position of work portion 21 and the portion of holding 22 so that rapid Assembly.

The shape of the holding portion 22 is convenient for holding operation, for example, the holding portion has a length direction as a whole, and since the cylinder is installed in the working portion 21, the moving direction of the piston in the cylinder is the axial direction of the cylinder, the length direction of the holding portion 22 in this embodiment is substantially perpendicular to the axial direction of the cylinder, or slightly oblique. The working portion 21 and the holding portion 22 are L-shaped as a whole, and in order to further improve the hand-holding feeling and to conform to the hand-shape characteristics, the overall shape of the control handle 2 in this embodiment is similar to a pistol shape. Hydraulically actuated control elements, such as switches or the like, may be provided at the grip portion 22 for one-handed operation.

In other embodiments, the length of the grip 22 may be substantially parallel to the axial direction of the cylinder, or even aligned with each other. The overall shape of the control handle 2 is a bar.

In a preferred embodiment, the grip 22 is attached to the proximal end 212 of the working portion 21. And the tubes extend from the distal end 211 of the working portion 21 out through the control handle 2 and further distally.

In order to adopt hydraulic drive pipe fitting relative motion, the connected mode of pipe fitting and piston has further been improved in this application embodiment, directly penetrates the cylinder with the pipe fitting for the structure is further compact, improves the integrated level.

Referring to fig. 4 (in the figure, in order to avoid the interference of parts to move the first cylinder 31 out, the reference is made to the hydraulic pressure chamber and the chambers according to the relative position with the piston, and the other relevant views are the same), the hydraulic pressure chamber in this embodiment is a first hydraulic pressure chamber 311; the piston is the first piston 4 of slidable mounting in first hydraulic pressure chamber 311, and the near-end of second pipe fitting 12 penetrates first hydraulic pressure chamber 311 and with first piston 4 fixed connection, and the near-end of first pipe fitting 11 further extends after first piston 4 is worn out through second pipe fitting 12, until with control handle 2 fixed connection.

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

Because the proximal end of the first tube 11 is fixedly connected to the control handle 2, the first piston 4 can drive the second tube 12 to axially slide relative to the first tube 11 when moving, and corresponding functions can be 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 driving circuit through a corresponding communication port, the proximal end of the second tube 12 penetrates into the first chamber 312 and is fixedly connected with the first piston 4, and the proximal end of the first tube 11 penetrates out of 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 driving method, the parts of the pipes entering and exiting the first cylinder 31 need to be sealed, and according to the movement relationship of the pipes relative to the first cylinder 31, fixed sealing or sliding sealing is adopted correspondingly.

The communication ports are provided in the first cylinder 31, the hydraulic drive circuit is for driving the first piston 4 in the first cylinder 31 to reciprocate, and a necessary control device such as a pump valve may be provided in the hydraulic drive circuit as needed, and in order to further improve the integration level, the hydraulic drive circuit is configured in the control handle 2 in one embodiment for driving the first piston 4 to move the pipes relatively.

The interior of the first tube member 11 can be used for threading a guide wire or the like, so that the proximal end of the first tube member 11 is fixed to the control handle 2, and in one embodiment, the proximal end of the working portion 21 is mounted with a line connector 113, and the first tube member 11 extends and is connected to the line connector 113. The line joint 113 may specifically adopt a luer joint and is in butt communication with the first pipe 11, and may also introduce physiological saline into the first pipe 11 through the line joint 113 as needed to perform an air exhaust operation. The proximal end of the first pipe 11 can be directly fixed to the pipe joint 113, or can be connected to the pipe joint 113 through a fastening sleeve 114, and the fastening sleeve 114 can be filled between the outer wall of the first pipe 11 and the inner wall of the pipe joint 113 to achieve fastening and sealing.

In the embodiment of fig. 5 to 9, the control handle 2 is provided with two hydraulic chambers, namely a first hydraulic chamber 311 and a second hydraulic chamber 321, and the plurality of pipe fittings comprise a first pipe fitting 11, an intermediate pipe fitting 13 and a second pipe fitting 12 which are slidably nested from inside to outside;

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

the first group is an intermediate pipe 13 and a second pipe 12 sleeved outside the intermediate pipe, the second pipe 12 on the outer layer enters the first hydraulic cavity 311 and is fixed with the first piston 4 in the first hydraulic cavity 311, and the intermediate pipe 13 on the inner layer extends out of the first hydraulic cavity 311 and is connected to the second piston 9 in the second hydraulic cavity 321.

The second group is a first pipe 11 and a middle pipe 13 sleeved outside the first pipe, the middle pipe 13 positioned on the outer layer enters the second hydraulic cavity 321 to be fixed with the second piston 9 in the second hydraulic cavity 321, and the first pipe 11 positioned on the inner layer extends out of the second hydraulic cavity 321 and is fixed on the control handle 2.

The control handle 2 is internally provided with a first cylinder 31 and a second cylinder 32 which respectively provide a first hydraulic cavity 311 and a second hydraulic cavity 321, the first cylinder 31 and the second cylinder 32 are coaxially arranged and mutually butted, an isolation sealing member 34 is arranged at the butted part, and the near end of the middle pipe fitting 13 penetrates through the isolation sealing member 34 in a sliding sealing manner to enter the second hydraulic cavity 321.

The nested many root canals of tubes spare that slides in proper order from inside to outside is three, wherein:

the distal end of the first tube member 11 is used for placing an interventional instrument;

the distal end of the intermediate tube member 13 is provided with a locking member for restraining the interventional instrument to the first tube member 11; the axial sliding of the intermediate tube member 13 relative to the first tube member 11 allows the locking member to change its engagement with the mounting head on the first tube member 11;

the distal end of the second tube 12 carries a loading section for wrapping or releasing an interventional instrument.

The first tube member 11 and the interventional instrument may be separated from each other in vivo, i.e. the interventional instrument remains in vivo; it may also be interconnected, and the interventional device is not left in the body after the procedure is completed, but is withdrawn outside the body with the first tube member 11.

In one embodiment, the distal end of the intermediate tube member 13 may be fixedly attached to the first tube member 11 for traction bending to change the posture of the interventional instrument for accurate positioning. The connection of the intermediate tube member 13 to the first tube member 11 at the distal end may be adjacent the mounting head on the first tube member 11, for example at the proximal side of the mounting head, although the distal end of the intermediate tube member 13 may also be directly fixed to the mounting head.

At the second cylinder 32, the second piston 9 divides the second hydraulic chamber 321 into a third chamber 322 and a fourth chamber 323, each chamber is connected to the hydraulic driving circuit through a corresponding communication port, the proximal end of the intermediate pipe 13 penetrates the third chamber 322 and is fixedly connected to the second piston 9, and the proximal end of the first pipe 11 penetrates the second piston 9 through the intermediate pipe 13 and then extends out of the second hydraulic chamber 321 through the fourth chamber 323.

The proximal end of the corresponding working portion 21 is fitted with a line connector, and the first pipe member 11 extends and is connected to the line connector 113.

The first chamber 312 and the second chamber 313 are divided according to the first piston 4, the third chamber 322 and the fourth chamber 323 are divided according to the second piston 9, and the volumes of the chambers are changed correspondingly and are not fixed because the positions of the two pistons are movable.

With reference to fig. 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 first tube 11 and the intermediate tube 13 are not changed. The same applies when the first piston 4 moves proximally.

When only the second piston 9 is moved distally, the intermediate tube 13 is brought to move distally, while the first tube 11 and the second tube 12 are not changed in position. The same applies when the second piston 9 is moved proximally.

In order to further improve the integration degree in one embodiment of the present application, a hydraulic driving circuit for driving the pipes to move relatively through the piston is further configured at the control handle 2. The hydraulic driving circuits are all arranged on the control handle 2, so that redundant external pipelines can be avoided, and component interference during handheld moving operation is reduced.

In one embodiment, the intervention instrument conveying system driven by a hydraulic mode comprises a plurality of pipe fittings 1 and a control handle 2, wherein the pipe fittings 1 are coaxially arranged from inside to outside, the control handle 2 drives the pipe fittings 1 to move relatively, the far ends of the pipe fittings 1 are used for operating intervention instruments in a mutual matching mode, the near ends of the pipe fittings 1 are connected to the control handle 2, and the pipe fittings 1 are driven by the control handle 2 in a hydraulic mode to move relatively;

control handle 2 is equipped with one or more hydraulic pressure chamber, and each hydraulic pressure intracavity slidable mounting respectively has the piston, still disposes the hydraulic drive return circuit that is used for through the relative motion of each pipe fitting 1 of piston drive in control handle 2 department, and hydraulic drive return circuit includes:

the driving pump 5 is communicated with the hydraulic pipeline and used for driving liquid to flow;

The hydraulic line generally refers to a pipe for communicating each component in the hydraulic drive circuit, and since the hydraulic drive circuit is disposed in the control handle 2, it is preferable that all or most of the hydraulic lines are housed in the control handle 2, and the hydraulic line is omitted in each drawing related to the specific structure in the present application, and since the communication relationship among the components has been clearly described, the hydraulic line can be disposed as needed in the implementation process, and since the hydraulic line generally employs a hose, how to house the hydraulic line in the control handle 2 can be implemented as needed.

When the hydraulic pipeline is used, liquid is filled, the flow direction of the liquid is changed to push the piston to reciprocate, and in order to improve safety, the liquid in the hydraulic driving loop is normal saline.

Corresponding control valves are arranged in the hydraulic drive circuit, which control the flow direction of the liquid, change the movement direction of the piston or realize other auxiliary functions, for example, the control valves may comprise one-way valves respectively arranged at the inlet and outlet of the drive pump 5 and a multi-way switching valve 6 for switching the movement direction of the piston.

In order to buffer and temporarily store the liquid, in one embodiment, the hydraulic drive circuit further comprises a liquid storage tank 7 communicated with the hydraulic pipeline for temporarily storing the liquid, the liquid storage tank 7 can also be integrally installed inside the control handle 2, and in order to fill the liquid in advance or in use on site, the liquid storage tank 7 is provided with a liquid filling port 71.

The liquid storage tank 7 not only has an inlet and an outlet communicated with the hydraulic pipeline, but also can be provided with a liquid injection port 71 independently, the liquid injection port 71 can be provided with a valve independently for connecting with external liquid injection equipment, and in addition, in a preferred embodiment, the liquid injection can be realized by utilizing the driving pump 5.

For example, in one embodiment, a liquid filling connector 72 is mounted on the control handle 2, and the liquid filling connector 72 is connected to the liquid filling port 71 through the driving pump 5 to fill the liquid in the liquid storage tank 7.

An external liquid filling device is connected to the liquid filling connector 72, and then liquid is filled into the liquid storage tank 7 through the driving pump 5, so that an external pressurizing device can be omitted, and the liquid filling is realized by fully utilizing a hydraulic driving circuit of the interventional instrument conveying system.

In one embodiment, the control valve comprises:

the multi-way switching valve 6 is provided with a driving side interface communicated with the inlet and the outlet of the driving pump 5 and a plurality of working side interfaces, wherein every two working side interfaces are communicated with one of the hydraulic cavities, and the multi-way switching valve 6 is provided with a plurality of gears and used for switching the communication relation between the driving side interfaces and different working side interfaces so as to control the flow direction of liquid.

The multi-way switching valve 6 can switch the communication relation between the hydraulic cavities and the inlet and the outlet of the driving pump 5 through different gears, and the change of the motion direction of the piston can be realized. The two one-way valves can avoid unnecessary backflow of liquid at the driving pump 5, and liquid conveying efficiency is guaranteed.

The drive-side port and the working-side port are merely distinguished by different communication members, and the multi-way switching valve 6 itself is merely a plurality of different ports.

In one embodiment, the control valve further comprises:

the outlet of the driving pump 5 is communicated to one of the driving side interfaces through the first one-way valve; the inlet of the driving pump is communicated to the other driving side interface through a second one-way valve and a liquid storage tank 7 in sequence.

To further instruct the operation, the multi-way selector valve 6 is fitted into the control handle 2, and the control handle 2 is provided with a mark indicating the gear position of the multi-way selector valve 6.

Referring to fig. 10 to 14, in an embodiment of the present application, the first cylinder 31 and the second cylinder 32 are coaxially arranged and are butted with each other through an isolation seal 34, a distal end of the first cylinder 31 is provided with a distal end sealing plug 35, and the first cylinder 31 is further provided with a communication port 314 and a communication port 315 for connecting a hydraulic driving circuit. The proximal end of the second cylinder 32 is provided with a proximal sealing plug 36 and the second cylinder 32 is also provided with a communication port 324 for connection to a hydraulic drive circuit and a communication port 325.

The second tube member 12 is connected to the first piston 4 by a sliding sealed through distal end sealing plug 35, the intermediate tube member 13 and the first tube member 11 extend inside the second tube member 12 out of the first piston 4, the intermediate tube member 13 is further connected to the second piston 9 by a sliding sealed through isolation seal 34, the first tube member 11 extends inside the intermediate tube member 13 out of the second piston 9, and further connected to the control handle 2 by a fixed sealed through proximal end sealing plug 36.

With reference to fig. 8 and 9, when only the first piston 4 moves distally, the second tube 12 is moved distally, and the positions of the intermediate tube 13 and the first tube 11 are not changed. The same applies when the first piston 4 is moved proximally.

Referring to fig. 15, in an embodiment, the reservoir 7 is a cylindrical structure with two closed ends, the bottom end of the reservoir 7 is provided with a liquid injection port 71, the side wall is provided with an inlet 73 and an outlet 74, and the hydraulic driving circuit is connected through the inlet 73 and the outlet 74.

Referring to fig. 16-18, in one embodiment, the drive pump 5 includes:

a pump housing 51 fixed to a control handle (the first half-shell 24 of which is shown in the drawings) and accessing the hydraulic drive circuit;

a working element 52 movably mounted in the pump housing 51 for driving the flow of the fluid;

a driving member 53 movably mounted to the control handle and operatively connected to the working element 52.

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

When the liquid injection device is used with a liquid injection port 71 of the liquid storage tank 7, the first half shell 24 is further fixed with a liquid injection joint 72, the corresponding pump shell 51 is provided with a transfer port 56 communicated with the pump chamber 57, when liquid is injected, 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, a liquid injection pipeline can be separately configured for liquid injection, and necessary control valves are arranged to avoid interference of a hydraulic driving loop.

The working element 52 reciprocates linearly or circularly within the pump housing 51 to drive fluid flow, and may take the form of an impeller or plunger in a conventional manner. In one embodiment, the working element 52 is a plunger against which the driving element 53 directly presses or is linked to the plunger via a transmission mechanism.

The driving member 53 is an electric, pneumatic or manual member, the driving member 53 is used to drive the working member 52 to move, the driving member 53 and the working member 52 can be linked in a structure or in a split manner, and according to the form of the power source, it is preferable to use a manual work piece, i.e. to drive the working member 52 by manual operation, but the basic function can be realized by electric or pneumatic operation.

In one embodiment, the hand piece is an operating knob slidably or rotatably mounted to the control handle.

In one embodiment, the driving member 53 has a shaft hole 531 and is mounted on a control handle through a rotating shaft, the control handle includes a working portion for providing a hydraulic chamber and a holding portion 22 connected to the working portion, and the operation knob is mounted on the holding portion 22. So that the pump 5 can be operated with one hand while being held.

In an embodiment, the drive pump 5 further comprises a reset element acting between the operating knob and the control handle. The driving member 53 and the working element 52 can be matched against each other, and can also be connected through a limiting structure or a traction member, so that the driving member 53 drives the working element 52 to reciprocate at the moment of resetting. A restoring element, for example a compression spring or a tension spring, which interacts with the drive element 53, or a coil spring, which is mounted in the region of the pivot, can be arranged between the drive element 53 and the control handle, and for the purpose of reciprocating the working element 52, the restoring element can also act directly on the working element 52, for example a compression spring, which is located in the pump chamber 57 and directly abuts against the working element 52. In use, the drive member 53 is repeatedly depressed, which in turn drives the working element 52 to cause fluid flow in the hydraulic drive circuit.

Referring to fig. 19 to 24, in an embodiment, the multi-way switching valve 6 includes a valve seat 61 and a valve core 62 that are engaged with each other, a valve cavity is provided in the valve seat 61, a plurality of interfaces 65 are provided on a side wall of the valve cavity for connecting the driving pump and each hydraulic pressure cavity, the valve core 62 is disposed in the valve cavity and rotationally engaged with the valve cavity, a plurality of flow channels 66 are provided on an outer peripheral wall of the valve core 62, when the valve core 62 rotates to different positions, the plurality of flow channels 66 and the plurality of interfaces 65 are in corresponding communication relation, for easy identification, in an embodiment, the multi-way switching valve 6 is embedded in the control handle 2, and the control handle 2 is provided with a mark 64 indicating a gear position of the multi-way switching valve 6.

The valve core 62 is connected with a wrench 63, which is rotated to different angles, that is, the wrench points to the marks 64 of different gears, in this embodiment, in order to match the functions of different gears, seven flow passages 66 (indicated by arrows in fig. 24) are provided, the specific functions of which are further described in other embodiments below, and certainly, the flow passages 66 can be correspondingly increased or decreased according to the functions to be realized.

Referring to fig. 6, 7, 12-14, 25-27, in order to establish a stable access channel, in an embodiment, a protection tube 14 is further sleeved on the outside of the second tube 12, and the proximal end of the protection tube 14 is fixed to the control handle 2.

The protection tube 14 is fixedly installed relative to the control handle and located on the periphery of the second tube 12, intervention is conducted through a channel established through the protection tube 14, blood vessels can be prevented from being scratched when the second tube 12 moves in a reciprocating mode, the length of the protection tube 14, namely the position of the far end of the protection tube 14, can be determined according to the length of an intervention path, the near end of the protection tube 14 is fixed to the far end side of the control handle 2, and the near end of the second tube 12 penetrates out of the protection tube 14 and then enters the first cylinder barrel.

To facilitate mounting of the proximal end of the protective tube 14, in one embodiment, a retaining sleeve 8 is mounted on the control handle, the proximal end of the protective tube 14 sealingly abuts the distal end of the retaining sleeve 8, and the proximal end of the second tube 12 extends through the protective tube 14 out of the retaining sleeve 8 and further into the first hydraulic chamber.

The fixing sleeve 8 is provided with a through hole 81, the proximal end of the protection tube 14 extends into the through hole 81 and is fixedly connected with the hole wall in a sealing manner in a bonding manner, a welding manner, an interference fit manner and the like, the fixing sleeve 8 and the control handle 2 can be fixed by adopting a clamping manner or a fastening manner and the like, in one embodiment, the periphery of the fixing sleeve 8 is provided with an annular positioning groove 83, and the edges of the two half shells of the control handle 2 are clamped with the positioning groove 83. It can be seen for example in fig. 27 that the corresponding portion of the first half-shell 24 snaps into the positioning slot 83 to limit the axial position of the harness 8.

Since the second tube 12 needs to slide back and forth, the proximal end of the sheath 8 is in sliding sealing engagement with the outer wall of the second tube 12, wherein the sliding sealing engagement can be either a direct contact engagement of the inner wall of the through hole 81 with the outer wall of the second tube 12 or an indirect engagement via other means.

In one embodiment, the first cylinder has a distal sealing plug 35, the proximal end of the sleeve 8 has a receiving cavity 84 communicating with the through hole 81, and a portion of the distal sealing plug 35 extends into the receiving cavity 84, which portion is sealingly filled between the sleeve 8 and the outer wall of the second tube 12. I.e. by means of an indirect sliding sealing fit, the second tube member 12 passes from the fixing sleeve 8 through the distal sealing plug 35 and then 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 exhausted during the operation.

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

The sliding seal fit part of the proximal end of the fixing sleeve 8 and the outer wall of the second pipe fitting 12 is used as a sealing point, and the axial position of the third exhaust hole 82 is located between the proximal end of the protection pipe 14 and the sealing point, so that the proximal end side of the sealing point is not influenced during exhaust, namely the normal operation of the hydraulic cavity is not influenced.

In order to make full use of the existing hydraulic drive circuit, the third exhaust port 82 opens into the hydraulic drive circuit. For example, one of the working-side ports of the multi-way switching valve communicates with the third exhaust port 82; the multi-way switching valve has a plurality of gears, wherein one gear is communicated with the outlet of the driving pump and the third exhaust hole 82, and the exhaust can be carried out in a liquid filling mode.

Referring to fig. 28 to 35, each hydraulic chamber is provided with a piston, and each piston can adopt the same structure as per se, only the position and the penetrating pipe are different, but the structural characteristics and the working principle are not influenced.

Two pipes that radially position adjacently include outer pipe fitting and inlayer pipe fitting, and each piston includes:

the fixed sealing part is sleeved on the outer-layer pipe fitting and is fixedly, hermetically and cooperatively matched with the outer wall of the outer-layer pipe fitting;

the fixed sealing part is fixedly connected with the sliding sealing part, and at least one of the fixed sealing part and the sliding sealing part is in sliding sealing fit with the inner wall of the hydraulic cavity.

In one embodiment, the two pipes radially adjacent to each other comprise an outer pipe, i.e. the second pipe 12, and an inner pipe, i.e. the intermediate pipe 13, and the first piston 4 comprises:

the fixed sealing part 41 is sleeved on the second pipe fitting 12 and is in fixed sealing fit with the outer wall of the second pipe fitting 12;

a sliding seal part 42 sleeved on the middle pipe 13 and in sliding sealing fit with the outer wall of the middle pipe 13;

the fixed sealing part 41 and the sliding sealing part 42 are fixedly connected, and the peripheries of the fixed sealing part and the sliding sealing part are in sliding sealing fit with the inner wall of the first hydraulic cavity.

The first piston 4 has a through hole extending along the axis, and the proximal end of the second tubular element 12 is fixedly connected in the through hole by means of a fastening sleeve 122, which fastening sleeve 122 can, on the one hand, fill the radial gap and, in addition, facilitate axial positioning and assembly. The first piston 4 is fixedly connected to the second tube 12 and slidably engaged with the intermediate tube 13, so that the first piston 4 can move to drive the second tube 12 without affecting the position of the intermediate tube 13.

In one embodiment, the two pipes which are adjacent in the radial direction include an outer pipe, i.e. the intermediate pipe 13, and an inner pipe, i.e. the first pipe 11, and the second piston 9 includes:

a fixed sealing part 91 sleeved on the middle pipe fitting 13 and fixedly and hermetically matched with the outer wall of the middle pipe fitting 13;

the sliding sealing part 92 is sleeved on the first pipe 11 and is in sliding sealing fit with the outer wall of the first pipe 11;

the fixed sealing part 91 and the sliding sealing part 92 are fixedly connected, and the peripheries of the fixed sealing part and the sliding sealing part are in sliding sealing fit with the inner wall of the second hydraulic cavity.

The second piston 9 has a through hole extending along the axis, in which the proximal end of the intermediate tubular element 13 is fixedly connected by means of a fastening sleeve 133, which fastening sleeve 133 can, on the one hand, fill the radial gap and, in addition, 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 that the second piston 9 can drive the intermediate pipe 13 when moving, but does not affect the position of the first pipe 11.

The proximal end of the first tubular member 11 extends out of the second hydraulic chamber and is fixedly connected to the line connector 113 by a fastening sleeve 114.

The radial gap between two adjacent pipe fittings in the radial position is an exhaust gap, and the hydraulic drive circuit is also communicated with the exhaust gap to exhaust. The auxiliary function of hydraulic drive can be fully exerted, the air is exhausted in a liquid filling mode, and extra air exhausting equipment is omitted.

The present application provides further improvements in the construction of the piston in order to incorporate the venting function.

In one embodiment, the piston is provided with a balance hole, and a balance valve core is arranged at the position of the balance hole; the piston is also provided with an exhaust hole communicated with the exhaust gap, and the exhaust hole is positioned between the fixed sealing part and the sliding sealing part; the piston divides the hydraulic cavity into two chambers, and when the pressure in the two chambers approaches, the balance valve core is opened to communicate the two chambers and the exhaust hole.

Since the two pistons have the same structure, the first piston 4 and the second piston 9 are used as an example hereinafter. The fixed seal portion 41 and the sliding seal portion 42 of the first piston 4 are fixed to each other by a connecting sleeve 43.

The fixed sealing part 41 and the sliding sealing part 42 each include a support 44 and a sealing sleeve 45 wrapping the outside of the support 44, and the connecting sleeve 43 is fixed between the two support 44.

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

The first vent hole 46 may be opened in a plurality along the circumferential direction of the connection sleeve 43 to ensure the smooth passage of the liquid.

Similarly, the radial gap between the middle pipe 13 and the first pipe 11 is a second exhaust gap, and the sidewall of the connecting sleeve in the second piston 9 is provided with a second exhaust hole communicated with the second exhaust gap.

A second air passing gap communicated 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 pressure chamber, and the axial position of the second air passing gap is between the fixed sealing part 91 and the sliding sealing part 92 of the second piston 9.

In one embodiment, the support bracket 44 includes:

an annular portion abutting against an axial end of the connection sleeve 43;

be fixed in the supporting disk of annular portion periphery, seal cover 45 wraps up in the supporting disk.

The annular part and the connecting sleeve 43 can be integrated, namely, two axial ends of the connecting sleeve 43 are used as the annular part, and the supporting disc is a disc of a frame structure. In order to ensure the strength, a plurality of ribs 432 are further provided on the outer circumference of the connecting sleeve 43, and the ribs 432 are connected between the support frames 44 of the fixed sealing part 41 and the sliding sealing part 42.

Through holes 49 are formed in each support frame 44 and each seal sleeve 45, each connecting sleeve 43 in each support frame 44 is of an axial through structure, a through area is used as a through hole, the positions of the through holes 49 on the seal sleeves 45 are corresponding, each through hole is used for penetrating a pipe fitting, according to the difference of the positions of pistons, the through holes which are directly matched with the inner edges of the through holes can be through holes through which the second pipe fittings 12, the middle pipe fittings 13 or the first pipe fittings 11 penetrate, the penetrating positions are in sealing matching, and the periphery of each seal sleeve 45 is in sliding sealing matching with the inner wall of the hydraulic cavity where the seal sleeve is located.

The fixed seal portion 41 and the sliding seal portion 42 are respectively provided with a balance hole 47 communicating with the first air passing gap 431, the support plate has a frame structure, so the balance hole 47 is directly provided on the seal sleeve 45 on each side, and the support frame 44 is provided with an escape groove 441 through which the balance valve core 48 passes in order to escape the balance valve core 48.

When the pressures on both sides of the first piston 4 are unequal, the liquid on the high pressure side drives the balance valve core 48 to move to close the balance hole 47 on the high pressure side, and then the first piston 4 is pushed to move towards the low pressure side.

When the exhaust is needed, liquid can be simultaneously input into the first chamber and the second chamber on both sides of the first piston 4, so that the pressures on both sides of the first piston 4 are substantially the same, and at this time, the position of the balance valve core 48 is exactly centered, that is, the balance holes 47 on the fixed sealing part 41 and the sliding sealing part 42 are both in an open state, and the liquid can enter the first air passing gap 431 through the balance holes 47 and then enter the first exhaust gap through the first exhaust hole 46, so that the exhaust of the filling liquid is realized.

In one embodiment, the balanced spool 48 includes:

the linkage rod 481 penetrates through the balance holes 47 on the fixed sealing part 41 and the sliding sealing part 42 in a sliding mode and is in clearance fit with the penetration part;

two sealing heads 482 are respectively fixed at two ends of the linkage rod 481, and correspondingly close or open the balance hole 47 under the action of lateral pressure 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 at the periphery of the balancing hole 47, and the sealing head 482 abuts against the recessed area 451 when closing the balancing hole 47.

The manner in which liquid enters the first exhaust gap from the first exhaust holes 46 is also slightly different depending on the particular location of the proximal end of the second tube member 12.

In an 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 supporting frame 44 in the sliding seal portion 42 of the first piston 4, that is, the second tube 12 has blocked the first venting hole 46 on the connecting sleeve 43, and at this time, the tube wall of the second tube 12 is provided with an adaptive venting hole matched with the first venting hole 46 in position.

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

In an embodiment, the proximal end of the second tube member 12 is fixed to a support bracket 44 in the fixed seal portion 41 of the first piston 4. I.e. the second tube member 12 does not block the first exhaust opening 46, the first exhaust opening 46 may communicate directly with the first exhaust gap.

The connection relationship of the proximal end of the intermediate tube member 13 at the second piston 9 and the manner of opening the adaptive vent hole are the same.

Referring to fig. 36 to 37, in an embodiment of the present invention, two cylinders are used, that is, a first cylinder 31 and a second cylinder 32, the first cylinder 31 has a first piston 4 with a balanced valve core 48 mounted therein, and the first cylinder 31 has a communication port 314 and a communication port 315; the second cylinder 32 has a second piston 9 with a balanced valve element mounted therein, and the second cylinder 32 has a communication port 324 and a communication port 325.

The pipe fittings which move axially relative to each other comprise a second pipe fitting fixedly connected with the first piston 4, a middle pipe fitting fixedly connected with the second piston 9 and a first pipe fitting fixedly connected with the control handle, in addition, the control handle is also connected with a protection pipe positioned at the periphery of the second pipe fitting through a fixing sleeve 8, and the fixing sleeve 8 is provided with a third exhaust hole 82.

Also disposed in the hydraulic drive circuit are a multi-way switching valve 6, a drive pump 5 having an inlet 54 and an outlet 55, and a reservoir 7 having an inlet 73 and an outlet 74. A first check valve 331 is connected to the inlet 54 of the drive pump 5; a second check valve 332 is connected to the outlet 55 of the drive pump 5. Each component communicates through a respective hydraulic line 33.

In this embodiment, the multi-way switching valve 6 has seven interfaces, two of the interfaces are driving side interfaces 67 respectively communicated with the inlet and outlet of the driving pump 5 (indirectly communicated through the check valve and the liquid storage tank), the other five interfaces of the multi-way switching valve 6 are working side interfaces 68, the corresponding driving side interfaces 67 and the corresponding working side interfaces 68 can be communicated in the multi-way switching valve 6 through a plurality of flow passages 66 on the valve core, seven gears including D1-D7 can be divided based on different communication relations, and each gear realizes different functions.

Specifically, the functions of each gear are as follows:

in the gears D5, D6, the chambers on both sides of the piston communicate with the outlet 55 of the drive pump 5 at the same time, i.e. the liquid is pumped in at the same time, so that the balancing valve core is centered and all the balancing holes are opened, so that the liquid can be filled into the corresponding exhaust gap.

Referring to fig. 38, in another embodiment, only the first cylinder 31 is used, the first cylinder 31 is provided with the first piston 4 with the balanced valve core 48 therein, and the first cylinder 31 is provided with the communication port 314 and the communication port 315.

The axially relatively movable pipe elements comprise a second pipe element fixedly connected with the first piston 4 and a first pipe element fixedly connected with the control handle.

In this embodiment, the multi-way switching valve 6 has four interfaces, two of which are driving side interfaces and are respectively communicated with the inlet and the outlet of the driving pump 5 (indirectly communicated through the check valve and the liquid storage tank), and the other two of the multi-way switching valve 6 are working side interfaces and can be divided into three gears D1-D3 based on different communication relations, and each gear realizes different functions.

Specifically, the functions of each gear are as follows:

in the position D3, the chambers on both sides of the piston are simultaneously connected to the outlet 55 of the drive pump 5, i.e. the liquid is introduced simultaneously, so that the balance valve core is centered and all balance holes are opened, so that the liquid can be filled into the gap between the second pipe and the first pipe for exhausting.

Referring to fig. 39, in another embodiment, only the first cylinder 31 is used, the first cylinder 31 is provided with the first piston 4 with the balanced valve core 48 therein, and the first cylinder 31 is provided with the communication port 314 and the communication port 315.

The pipe elements for the axial relative movement comprise a second pipe element fixedly connected with the first piston 4 and a first pipe element fixedly connected with the control handle.

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

In this embodiment, the multi-way switching valve 6 has five interfaces, two of which are driving side interfaces and are respectively communicated with the inlet and the outlet of the driving pump 5 (indirectly communicated through the one-way valve and the liquid storage tank), and the other three of the multi-way switching valve 6 are working side interfaces, and can be divided into four gears D1-D4 based on different communication relations, and each gear realizes different functions.

Specifically, the functions of each gear are as follows:

in position D3, the chambers on both sides of the piston are simultaneously connected to the outlet 55 of the drive pump 5, i.e. simultaneously filled with liquid, so that the balance valve element is centered and all balance holes are opened, so that liquid can be filled into the exhaust gap between the second pipe and the first pipe.

Referring to fig. 40-43, the control handle can implement the operation related to the interventional device at the distal end by driving the pipes to move relatively, in an embodiment, a mounting head 112 for connecting the interventional device is disposed on the first pipe 11, and a locking hole 115 is disposed on the mounting head 112;

a locking member 131 is fixed to a distal end of the middle tube member 13, the locking member 131 is inserted into the locking hole 115 in a locked state, the interventional instrument itself is bound to the locking member 131 or through a binding wire, and the locking member 131 is separated from the locking hole 115 in a released state to release the interventional instrument.

The proximal end of the interventional instrument can be provided with a hook, a ring and other structures, and is directly wound on the locking piece 131 through the hook and the ring, and the farthest end of the locking piece 131 is inserted into the lock hole 115, so that the proximal end position of the interventional instrument can be limited, and the proximal end of the interventional instrument can be released only if the locking piece 131 is separated from the lock hole 115.

In addition, a binding wire can be arranged, one part of the binding wire is connected with the near end threading of the interventional instrument, the other part of the binding wire is wound on the locking piece 131, and the binding wire can play a role in limiting or releasing through the locking piece 131.

The distal most end of the first tubular member 11 is the guide head 111, the guiding head 111 and the mounting head 112 are the mounting position for the interventional device, when the interventional device is inputted, the interventional device is radially compressed and sleeved on the first tubular member 11, the distal end of the interventional device is overlapped on the guiding head 111, the proximal end of the interventional device is connected to the mounting head 112 and is further limited by the locking piece 131, the distal end of the second tubular member 12 is provided with an expanded loading section to wrap the interventional device, when the second tubular member 12 is withdrawn (slides to the proximal side) during releasing, the interventional device is gradually exposed and radially expanded, but because the proximal end of the interventional device is locked on the mounting head 112, even if the interventional device is completely exposed on the second tubular member 12, the proximal end of the interventional device is not released, after the position of the interventional device is confirmed, the middle tubular member 13 is withdrawn again, so that the locking piece 131 is away from the locking hole 115, and thereafter the proximal end of the interventional device can be completely released, so that the interventional device can be pushed forward to recover the interventional device when the positioning is not good, reloading and adjusting the position.

In one embodiment, the locking member 131 is formed in a rod shape, the middle tube 13 has a connecting seat 132 fixed therein, the proximal end of the locking member 131 is inserted and fixed to the connecting seat 132, and the distal end of the locking member 131 is engaged with the locking hole 115 by moving in the axial direction of the middle tube 13.

To equalize the distribution of the locking force, in a preferred embodiment, the locking element 131 is a plurality of straight rods arranged side by side. Each straight rod extends along the axial direction of the middle pipe fitting 13, and a plurality of straight rods are uniformly distributed along the circumferential direction of the middle pipe fitting 13, for example, two to four straight rods.

The proximal end of the interventional device generally has a coupling lug, and a positioning notch 117 corresponding to the coupling lug can be disposed on the outer periphery of the mounting head 112 to further maintain the position of the coupling lug and prevent unnecessary axial sliding or relative rotation between the coupling lug and the mounting head 112.

When the binding wire is used in combination with a binding wire, in order to facilitate threading of the binding wire, the mounting head 112 may be provided with a threading hole 116, and a threading direction of the threading hole 116 may be along an axial direction or a radial direction of the mounting head 112, or the mounting head 112 itself may be perforated, or an auxiliary component with a hole may be used to implement the threading, and of course, the auxiliary component is fixedly connected to the mounting head.

The connecting lug 101 has a ring-shaped connecting part at the distal end, 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 locking piece 131 passes through the wire loop 135 and enters the insertion locking hole 115, so that the wire loop 135 can not be separated from the locking piece 131, namely the connecting lug 101 is bound on the mounting head 112.

In fig. 43, it can be seen that the locking member 131 is disengaged from the locking hole 115 in the unlocked state, the wire loop 135 is released from the restriction, and the binding wire 134 can be withdrawn out of the loop-shaped coupling portion to release the interventional instrument after the coupling lug 101 is further moved.

Referring to fig. 44-46, in another embodiment, positioning protrusions 118 corresponding to the engaging lugs are provided on the outer periphery of the mounting head 112 to further maintain the position of the engaging lugs and prevent unwanted axial sliding or relative rotation between the engaging lugs and the mounting head 112. In addition, the threading holes 116 extend in the radial direction and are right arranged on the positioning protrusions 118, the two positioning protrusions 118 are symmetrical, and the threading holes 116 penetrate through the two positioning protrusions 118 along the axial direction of the positioning protrusions 118.

Referring to fig. 47-50, in another embodiment, positioning protrusions 118 corresponding to the engaging lugs are provided on the outer periphery of the mounting head 112 to further maintain the position of the engaging lugs and prevent unwanted axial slippage or relative rotation between the engaging lugs and the mounting head 112.

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

The binding wire can be wound in various ways, but generally at least through the wire threading hole 116 and contacts with the engaging lug and the locking piece 131, and after the locking piece 131 is separated from the locking hole 115, the binding wire is released from the engaging lug, or the engaging lug and the binding wire are released together.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application.

Claims

The intervention instrument conveying system driven by a hydraulic mode comprises a plurality of pipe fittings coaxially arranged from inside to outside and a control handle for driving the pipe fittings to move relatively, wherein the far ends of the pipe fittings are used for operating intervention instruments in a mutually matched mode, and the near ends of the pipe fittings are connected to the control handle;

the brake valve is characterized in that the control handle is provided with one or more hydraulic cavities, pistons are respectively installed in the hydraulic cavities in a sliding mode, a hydraulic driving circuit used for driving the pipe fittings to move relatively through the pistons is further configured at the control handle, and the hydraulic driving circuit comprises:

the hydraulic pipeline is used for providing a liquid channel communicated with each hydraulic cavity;

a drive pump in communication with the hydraulic line for driving fluid flow;

and the control valve is communicated with the hydraulic pipeline and used for controlling the flow direction of the liquid.
The hydraulically driven interventional instrument delivery system of claim 1, wherein the radially adjacent tubes comprise an outer tube and an inner tube, the outer tube entering one of the hydraulic chambers and being secured to the piston therein, the inner tube being extended to connect to the piston of the other hydraulic chamber or being secured to the control handle.
The hydraulically driven interventional instrument delivery system of claim 1, wherein the hydraulic drive circuit further comprises a reservoir in communication with the hydraulic line for temporarily storing fluid.
The hydraulically driven interventional device delivery system of claim 3, wherein the fluid reservoir defines a fluid injection port.
The hydraulically driven interventional instrument delivery system of claim 4, wherein the control handle is provided with a filling connector, the filling connector is communicated with the filling port through the drive pump for filling the liquid storage tank with liquid.
The hydraulically driven interventional instrument delivery system of claim 1, wherein the liquid in the hydraulic drive circuit is saline.
The hydraulically driven interventional instrument delivery system of claim 1, wherein the control valve comprises:

the multi-way switching valve is provided with a driving side interface communicated with the inlet and the outlet of the driving pump and a plurality of working side interfaces, wherein every two working side interfaces are communicated with one of the hydraulic cavities, and the multi-way switching valve is provided with a plurality of gears and used for switching the communication relation between the driving side interfaces and different working side interfaces so as to control the flow direction of liquid.
The hydraulically driven interventional instrument delivery system of claim 7, wherein the control valve further comprises:

the outlet of the driving pump is communicated to one of the driving side interfaces through the first one-way valve; an inlet of the driving pump is communicated to the other driving side interface through a second one-way valve and a liquid storage tank in sequence;

the multi-way switching valve is embedded in the control handle, and the control handle is provided with a mark indicating the gear of the multi-way switching valve.
The hydraulically driven interventional instrument delivery system of claim 7, wherein the control handle has a first cylinder mounted therein, the first cylinder having a first hydraulic chamber therein, and two of the working side ports of the multi-way switching valve are in communication with the first hydraulic chamber.
The hydraulically driven interventional instrument delivery system of claim 9, wherein a first piston is slidably mounted within the first hydraulic chamber, the first piston dividing the first hydraulic chamber into a first chamber and a second chamber, the first chamber and the second chamber being connected to the hydraulic drive circuit by respective communication ports.
The hydraulically driven interventional instrument delivery system of claim 10, wherein the multi-way switching valve is configured in one of the following forms:

(a) the switching valve of leading to more is total four interfaces, wherein two are the drive side interface, be linked together with the play of driving pump, the entry respectively, two other interfaces of the switching valve of leading to more are the working side interface, inside many runners through on the case of the switching valve of leading to more communicates corresponding drive side interface and working side interface, many pipes include by interior and the first pipe fitting and the second pipe fitting that set gradually outward, can divide into D1 ~ D2 gear based on the communicating relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: proximal movement of the first piston

(b) The switching valve of leading to more is total four interfaces, wherein two are the drive side interface, be linked together with the play of driving pump, the entry respectively, two other interfaces of the switching valve of leading to more are the working side interface, inside many runners through on the case of the switching valve of leading to more communicates corresponding drive side interface and working side interface, many pipes include by interior and the first pipe fitting and the second pipe fitting that set gradually outward, can divide into D1 ~ D3 gear based on the communicating relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: proximal movement of the first piston

D3: gap exhaust of second pipe fitting and first pipe fitting

(b) The total five interfaces of many-way diverter valve, wherein two are the drive side interface, respectively with the play of driving pump, the entry is linked together many-way diverter valve other three interface and is the work side interface, many-way diverter valve is inside to communicate corresponding drive side interface and work side interface through many runners on the case, many pipes include by interior and first pipe fitting and the second pipe fitting that sets gradually outward, the outside cover of second pipe fitting is still equipped with the protection tube, can divide into D1 ~ D4 gear based on the communicating relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: proximal movement of the first piston

D3: gap exhaust of second pipe fitting and first pipe fitting

D4: and the gap between the protection pipe and the second pipe fitting is exhausted.
The hydraulically driven interventional instrument delivery system of claim 7, wherein the control handle has a first cylinder and a second cylinder mounted therein, the first cylinder has a first hydraulic chamber therein, the second cylinder has a second hydraulic chamber therein, two of the working side ports of the multi-way switching valve are in communication with the first hydraulic chamber, and the other two working side ports are in communication with the second hydraulic chamber.
The hydraulically driven interventional instrument delivery system of claim 12, wherein a first piston is slidably mounted in a first hydraulic chamber, a second piston is slidably mounted in a 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 respective communication port.
The hydraulically driven interventional instrument delivery system of claim 13, wherein the multi-way switching valve is configured in one of the following forms:

(a) the total six interfaces of many-way diverter valve, wherein two are the drive side interface, respectively with the play of driving pump, the entry is linked together, four other interfaces of many-way diverter valve are the working side interface, inside many runners through on the case of many-way diverter valve communicates corresponding drive side interface and working side interface, many pipes include by interior and the first pipe fitting that sets gradually outward, middle pipe fitting and second pipe fitting, can divide into D1 ~ D4 gear based on the communicating relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: proximal movement of the first piston

D3: distal movement of the second piston

D4: the second piston moving towards the near end

(b) The total six interfaces of many-way diverter valve, wherein two are the drive side interface, respectively with the play of driving pump, the entry is linked together, four other interfaces of many-way diverter valve are the working side interface, inside many runners through on the case of many-way diverter valve communicates corresponding drive side interface and working side interface, many pipes include by interior and the first pipe fitting that sets gradually outward, middle pipe fitting and second pipe fitting, can divide into D1 ~ D6 gear based on the communicating relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: the first piston moving towards the near end

D3: distal movement of the second piston

D4: the second piston moving towards the near end

D5: gap exhaust of intermediate pipe and first pipe

D6: gap exhaust of second pipe fitting and middle pipe fitting

(c) The switching valve of leading to more has seven interfaces altogether, wherein two are the drive side interface, respectively with the play of driving pump, the entry is linked together, five other interfaces of the switching valve of leading to more are the working side interface, inside many runners through on the case of the switching valve of leading to more communicates corresponding drive side interface and working side interface, many pipes include by interior and the first pipe fitting that sets gradually outward, middle pipe fitting and second pipe fitting, the outside cover of second pipe fitting is still equipped with the protection tube, can divide into D1 ~ D7 gear based on the intercommunication relation of difference, the function that every gear was realized is as follows:

d1: distal movement of the first piston

D2: proximal movement of the first piston

D3: distal movement of the second piston

D4: the second piston moving towards the near end

D5: gap exhaust of intermediate pipe and first pipe

D6: gap exhaust of second pipe fitting and middle pipe fitting

D7: and the gap between the protection pipe and the second pipe fitting is exhausted.