Hydraulically actuated interventional device delivery system

Abstract

A hydraulic-driven interventional device delivery system includes a plurality of pipe fittings (1) coaxially arranged from inside to outside, and a control handle (2) for driving the relative movement of the plurality of pipe fittings (1). The distal ends of the pipe fittings (1) are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings (1) are connected to the control handle (2). At the control handle (2), the relative movement of the pipe fittings (1) is driven in a hydraulic manner; the control handle (2) is provided with one or more hydraulic chambers (311, 321), and pistons (4, 9) are slidably installed in each of the hydraulic chambers (311, 321). Two pipe fittings (1) adjacent in the radial direction include an outer pipe fitting and an inner pipe fitting. The outer pipe fitting enters one of the hydraulic chambers (311, 321) and is fixed to the piston (4, 9) in the hydraulic chamber (311, 321), and the inner pipe fitting extends and is connected to the piston (4, 9) in other hydraulic chambers (311, 321) or is fixed to the control handle (2). The hydraulic-driven interventional device delivery system adopts a hydraulic drive mode, which is convenient and fast to use, and different functions can also be switched through a hydraulic drive circuit.

Description

Technical Field

[0001] This application relates to the field of medical devices, and particularly to a delivery system for delivering interventional devices into the body. Background Art

[0002] An interventional device delivery system generally includes a control handle disposed at the proximal end, i.e., the operator's side. A plurality of slender pipe fittings are slidably nested inside and outside each other. The proximal end of each pipe fitting is a control end and is connected to the control handle. The distal end of each pipe fitting is a working end and can be inserted into the body and cooperate with each other to complete the delivery, release, or retrieval of the interventional device, etc. The control handle generally can be provided with sliding or rotating components, and then drive the relative movement along the axial direction between the pipe fittings. Most of the existing control handles are regulated in a mechanical manner. With the development of interventional devices, more requirements are put forward for the functions of interventional devices. For example, the delivery system needs to realize functions such as the release, retrievability, and bending adjustment of valves. These different functional modules are usually realized by their respective independent drive modules, which makes the transmission of the control handle relatively complex and the overall size larger, which is not conducive to the operation of the surgery. Summary of the Invention

[0003] The present invention further improves the driving method for the existing interventional device delivery system, making it more convenient to operate.

[0004] A hydraulically driven interventional device delivery system includes a plurality of pipe fittings coaxially arranged from inside to outside, and a control handle for driving the relative movement of the plurality of pipe fittings. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device. The proximal ends of the pipe fittings are connected to the control handle, and the relative movement of the pipe fittings is driven in a hydraulic manner at the control handle;

[0005] The control handle is provided with one or more hydraulic chambers, and pistons are slidably installed in each hydraulic chamber respectively. Two pipe fittings adjacent in the radial direction include an outer pipe fitting and an inner pipe fitting. The outer pipe fitting enters one of the hydraulic chambers and is fixed to the piston in the hydraulic chamber. The inner pipe fitting extends and is connected to the pistons of other hydraulic chambers or is fixed to the control handle.

[0006] The following also provides several optional ways, but it is not an additional limitation to the above overall solution, but only further supplementation or preference. Without technical or logical contradictions, each optional way can be combined with the above overall solution alone, or multiple optional ways can be combined with each other.

[0007] Optionally, the plurality of pipe fittings include a first pipe fitting and a second pipe fitting that are slidably nested in sequence from inside to outside. The distal end of the first pipe fitting is used to place the interventional device. When the two pipe fittings move relative to each other, the distal end of the second pipe fitting wraps or releases the interventional device.

[0008] Optionally, the hydraulic chamber is a first hydraulic chamber; the piston is a first piston slidably installed in the first hydraulic chamber. The proximal end of the second pipe fitting penetrates into the first hydraulic chamber and is fixedly connected to the first piston. The proximal end of the first pipe fitting extends further after passing through the first piston via the second pipe fitting until it is fixedly connected to the control handle.

[0009] 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 pipe fitting penetrates into the first chamber and is fixedly connected to the first piston. The proximal end of the first pipe fitting passes through the first piston via the second pipe fitting and then extends out of the first hydraulic chamber through the second chamber.

[0010] Optionally, an intermediate pipe fitting is also coupled between the first pipe fitting and the second pipe fitting. The distal end of the intermediate pipe fitting is fixedly connected to the first pipe fitting for traction and bending, or a locking member for restricting the interventional device to the first pipe fitting is provided at the distal end of the intermediate pipe fitting.

[0011] The intermediate pipe fitting can be used as a bending pipe;

[0012] The intermediate pipe fitting can also be used as a wire pulling pipe;

[0013] Only one multi-way switching valve and a drive pump are needed to control different hydraulic chambers, simplifying the system structure.

[0014] Optionally, a second hydraulic chamber communicating with the hydraulic drive circuit is provided inside the control handle, and a second piston is provided in the second hydraulic chamber;

[0015] The proximal end of the intermediate pipe fitting passes through the first piston via the second pipe fitting and then extends further into the second hydraulic chamber and is fixedly connected to the second piston;

[0016] The proximal end of the first pipe fitting passes through the second piston via the intermediate pipe fitting and then extends further until it is fixedly connected to the control handle.

[0017] Optionally, the second piston divides the second hydraulic chamber into a third chamber and a fourth chamber. Each chamber is connected to the hydraulic drive circuit through a corresponding communication port. The proximal end of the intermediate pipe fitting penetrates into the third chamber and is fixedly connected to the second piston. The proximal end of the first pipe fitting passes through the second piston via the intermediate pipe fitting and then extends out of the second hydraulic chamber through the fourth chamber.

[0018] Optionally, the control handle is fixedly installed with a first cylinder, and the inside of the first cylinder is the first hydraulic chamber;

[0019] The control handle is fixedly installed with a second cylinder, and the interior of the second cylinder is the second hydraulic chamber;

[0020] The first cylinder and the second cylinder are arranged coaxially in sequence from the distal end to the proximal end.

[0021] Optionally, the control handle surrounds the second cylinder, and a positioning component matching with the second cylinder is arranged on the control handle.

[0022] Optionally, the first cylinder and the second cylinder are butted against each other, and an isolation seal is arranged at the butting part, and a through hole allowing the intermediate pipe fitting to slide through in a sealed manner is formed in the isolation seal.

[0023] Optionally, the control handle includes a working part and a holding part connected to the working part. The second pipe fitting extends into the first hydraulic chamber from the distal end of the working part, and the first pipe fitting extends and is connected to the proximal end of the working part.

[0024] Optionally, an installation head is arranged on the first pipe fitting, and a lock hole is arranged on the installation head;

[0025] A lock is fixed to the distal end of the intermediate pipe fitting. The lock is inserted into the lock hole in the locked state, and the interventional device is itself or tied to the lock through a lashing wire. The lock is disengaged from the lock hole in the unlocked state to release the interventional device.

[0026] Optionally, a wire passing hole is arranged on the installation head. The connecting ear of the interventional device is provided with an annular connecting part. The lashing wire passes through the wire passing hole and the connecting part at the same time, and a wire loop for passing through the lock is reserved at the end of the lashing wire.

[0027] Optionally, each piston includes:

[0028] A fixed sealing part, which is sleeved on the outer pipe fitting and fixedly sealed and matched with the outer wall of the outer pipe fitting;

[0029] A sliding sealing part, which is sleeved on the inner pipe fitting and slidably sealed and matched with the outer wall of the inner pipe fitting;

[0030] The fixed sealing part and the sliding sealing part are fixedly connected, and at least one of them is slidably sealed and matched with the inner wall of the hydraulic chamber where it is located.

[0031] Optionally, the radial gap between two pipe fittings adjacent in the radial direction is an exhaust gap, and a hydraulic drive circuit for driving the relative movement of each pipe fitting through the piston is further configured at the control handle, and the hydraulic drive circuit is also connected to the exhaust gap for exhausting air.

[0032] Optionally, balance holes are provided on the piston, and balance valve cores are installed at the positions of the balance holes; exhaust holes communicating with the exhaust gap are also formed on the piston, and the exhaust holes are located between the fixed sealing portion and the sliding sealing portion;

[0033] The piston divides the hydraulic chamber where it is located into two chambers. When the pressures in the two chambers approach, the balance valve core opens to connect the two chambers and the exhaust holes.

[0034] Optionally, a hydraulic chamber is provided at the distal end of the catheter system for driving the release of the interventional device; a piston is slidably installed in the hydraulic chamber, and the distal end of the piston is detachably connected to the interventional device.

[0035] Optionally, the hydraulic drive circuit is configured in the control handle to drive the first piston to make the pipe fittings move relative to each other.

[0036] Optionally, the first hydraulic chamber is directly formed inside the control handle.

[0037] Optionally, the control handle surrounds the first cylinder barrel, and a positioning component matching with the first cylinder barrel is provided on the control handle.

[0038] Optionally, the control handle includes a working portion for providing the first hydraulic chamber and a holding portion connected to the working portion. The working portion has opposite distal and proximal ends. The second pipe fitting extends into the first hydraulic chamber from the distal end of the working portion, and the first pipe fitting extends and is connected to the proximal end of the working portion.

[0039] Optionally, the holding portion is connected to the proximal end of the working portion.

[0040] Optionally, a pipe joint is installed at the proximal end of the working portion, and the first pipe fitting extends and is connected to the pipe joint.

[0041] Optionally, a hydraulic drive circuit for driving the pipe fittings to move relative to each other through the piston is further configured at the control handle; the hydraulic drive circuit includes:

[0042] A hydraulic pipeline for providing a liquid channel communicating with each hydraulic chamber;

[0043] A drive pump connected to the hydraulic pipeline for driving the liquid to flow;

[0044] A control valve connected to the hydraulic pipeline for controlling the liquid flow direction.

[0045] Optionally, the hydraulic drive circuit further includes a liquid storage tank connected to the hydraulic pipeline for temporarily storing the liquid.

[0046] Optionally, the liquid storage tank is provided with a liquid injection port.

[0047] Optionally, a liquid injection connector is installed on the control handle, and the liquid injection connector is communicated with the liquid injection port through the driving pump for injecting liquid into the liquid storage tank.

[0048] Optionally, the liquid in the hydraulic drive circuit is physiological saline.

[0049] The control valve includes:

[0050] A multi-way switching valve having a driving side interface connected to the outlet and inlet of the driving pump, and a plurality of working side interfaces, wherein every two working side interfaces are communicated with one of the hydraulic chambers, and the multi-way switching valve has a plurality of gears for switching the communication relationship between the driving side interface and different working side interfaces to control the liquid flow direction.

[0051] Optionally, the control valve further includes:

[0052] Two one-way valves, the outlet of the driving pump is communicated to one of the driving side interfaces through the first one-way valve; the inlet of the driving pump is sequentially communicated to the other driving side interface through the second one-way valve and the liquid storage tank;

[0053] The multi-way switching valve is embedded in the control handle, and a mark indicating the gear of the multi-way switching valve is provided on the control handle.

[0054] Optionally, the driving pump includes:

[0055] A pump housing fixed to the control handle and connected to the hydraulic drive circuit;

[0056] A working member movably installed in the pump housing for driving the liquid to flow;

[0057] A driving member movably installed on the control handle and linked with the working member.

[0058] Optionally, the driving member is an electric member, a pneumatic member or a manual member.

[0059] Optionally, the manual member is slidably or rotatably installed on the operation button of the control handle.

[0060] Optionally, the working member is a plunger, and the driving member directly presses the plunger or is linked with the plunger through a transmission mechanism.

[0061] Optionally, the driving pump further includes a reset member, and the reset member acts between the driving member and the control handle.

[0062] 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 button is installed on the holding portion.

[0063] Optionally, the driving pump is located outside the control handle.

[0064] Optionally, the driving pump and / or the liquid storage tank are located outside the control handle.

[0065] Optionally, the first piston includes:

[0066] A fixed sealing portion sleeved on the second pipe fitting and fixedly and sealingly engaged with the outer wall of the second pipe fitting;

[0067] A sliding sealing portion sleeved on the first pipe fitting and slidably and sealingly engaged with the outer wall of the first pipe fitting;

[0068] The fixed sealing portion and the sliding sealing portion are fixedly connected, and at least one of them is slidably and sealingly engaged with the inner wall of the first hydraulic chamber.

[0069] Optionally, both the fixed sealing portion and the sliding sealing portion are slidably and sealingly engaged with the inner wall of the first hydraulic chamber;

[0070] The fixed sealing portion and the sliding sealing member are fixed to each other through a connecting sleeve.

[0071] Optionally, the radial clearance between the second pipe fitting and the first pipe fitting is an exhaust clearance, and an exhaust hole communicating with the exhaust clearance is formed in the side wall of the connecting sleeve.

[0072] Optionally, an air passing clearance communicating with the exhaust hole is left between the outer wall of the connecting sleeve and the inner wall of the first hydraulic chamber, and the axial position of the air passing clearance is between the fixed sealing portion and the sliding sealing portion;

[0073] The first piston divides the first hydraulic chamber into a first chamber and a second chamber, wherein the fixed sealing portion faces the first chamber and the sliding sealing portion faces the second chamber;

[0074] Through holes are respectively formed in the fixed sealing portion and the sliding sealing portion, a balance valve core is installed at the through holes, and when the pressures in the first chamber and the second chamber approach, the balance valve core opens to communicate the first chamber, the second chamber and the air passing clearance.

[0075] Optionally, both the fixed sealing portion and the sliding sealing portion include a support frame and a sealing sleeve wrapped outside the support frame, and the connecting sleeve is fixed between the two support frames.

[0076] Optionally, each support frame and the sealing sleeve are respectively provided with through holes for the first pipe fitting or the second pipe fitting to pass through, and are sealingly engaged at the passing positions, and the outer periphery of each sealing sleeve is slidably and sealingly engaged with the inner wall of the first hydraulic chamber.

[0077] Optionally, the proximal end of the second pipe fitting passes through the connecting sleeve and is fixed to the support frame in the sliding seal part, and an adaptation exhaust hole matching the position of the exhaust hole is formed in the pipe wall of the second pipe fitting.

[0078] Optionally, the proximal end of the second pipe fitting is fixed to the support frame in the fixed seal part.

[0079] Optionally, a hydraulic drive circuit for driving the relative movement of each pipe fitting through the piston is further arranged at the control handle; the hydraulic drive circuit includes:

[0080] A hydraulic pipeline for providing a liquid channel;

[0081] A drive pump connected to the hydraulic pipeline for driving the liquid to flow;

[0082] A multi-way switching valve having a drive side interface connected to the outlet and inlet of the drive pump, and a plurality of working side interfaces, wherein two working side interfaces are connected to the first hydraulic chamber, and the other two working side interfaces are connected to the second hydraulic chamber;

[0083] The multi-way switching valve has a plurality of gears and is used for switching the communication relationship between the drive side interface and different working side interfaces to control the liquid flow direction.

[0084] Optionally, the first piston includes:

[0085] A fixed seal part sleeved on the second pipe fitting and fixedly sealed and matched with the outer wall of the second pipe fitting;

[0086] A sliding seal part sleeved on the first pipe fitting and slidably sealed and matched with the outer wall of the intermediate pipe fitting;

[0087] The second piston includes:

[0088] A fixed seal part sleeved on the intermediate pipe fitting and fixedly sealed and matched with the outer wall of the intermediate pipe fitting;

[0089] A sliding seal part sleeved on the first pipe fitting and slidably sealed and matched with the outer wall of the first pipe fitting;

[0090] In the same piston, the fixed seal part and the sliding seal part are fixedly connected, and at least one of them is slidably sealed and matched with the inner wall of the hydraulic chamber where it is located.

[0091] Optionally, in the same piston, both the fixed seal part and the sliding seal part are slidably sealed and matched with the inner wall of the hydraulic chamber where they are located; the fixed seal part and the sliding seal part are fixed to each other through a connecting sleeve.

[0092] Optionally, the radial clearance between the second pipe fitting and the intermediate pipe fitting is a first exhaust clearance, and a first exhaust hole communicating with the first exhaust clearance is formed in the side wall of the connecting sleeve in the first piston;

[0093] The radial clearance between the intermediate pipe fitting and the first pipe fitting is a second exhaust clearance, and a second exhaust hole communicating with the second exhaust clearance is formed in the side wall of the connecting sleeve in the second piston.

[0094] Optionally, a first air passage clearance communicating with the first exhaust hole is left between the outer wall of the connecting sleeve in the first piston and the inner wall of the first hydraulic chamber, and the axial position of the first air passage clearance is between the fixed sealing portion and the sliding sealing portion of the first piston;

[0095] The first piston divides the first hydraulic chamber into a first chamber and a second chamber. The fixed sealing portion of the first piston faces the first chamber, and the sliding sealing portion of the first piston faces the second chamber;

[0096] Balancing holes are respectively formed in the fixed sealing portion and the sliding sealing portion of the first piston. A balancing valve core is installed at the balancing holes. When the pressures in the first chamber and the second chamber approach, the balancing valve core opens to connect the first chamber, the second chamber and the first air passage clearance.

[0097] Optionally, in the same piston, both the fixed sealing portion and the sliding sealing portion include a support frame and a sealing sleeve wrapped outside the support frame, and the connecting sleeve is fixed between the two support frames.

[0098] Optionally, each support frame and the sealing sleeve are provided with through holes for the first pipe fitting, the intermediate pipe fitting or the first pipe fitting to pass through, and are in sealing fit at the passing parts. The outer periphery of each sealing sleeve is in sliding sealing fit with the inner wall of the hydraulic chamber where it is located.

[0099] Optionally, the proximal end of the second pipe fitting passes through the connecting sleeve of the first piston and is fixed to the support frame in the sliding sealing portion of the first piston, and an adaptive exhaust hole matching the position of the first exhaust hole is formed in the pipe wall of the second pipe fitting.

[0100] Optionally, the proximal end of the second pipe fitting is fixed to the support frame in the fixed sealing portion of the first piston.

[0101] Optionally, a second air passage clearance communicating with the second exhaust hole is left between the outer wall of the connecting sleeve in the second piston and the inner wall of the second hydraulic chamber, and the axial position of the second air passage clearance is between the fixed sealing portion and the sliding sealing portion of the second piston;

[0102] The second piston divides the second hydraulic chamber into a third chamber and a fourth chamber. The fixed sealing portion of the second piston faces the third chamber, and the sliding sealing portion of the second piston faces the fourth chamber;

[0103] A balancing hole is respectively provided on the fixed sealing part and the sliding sealing part of the second piston, and a balancing valve core is installed at the balancing hole. When the pressure in the third chamber and the fourth chamber approaches, the balancing valve core opens to connect the third chamber, the fourth chamber and the second air gap.

[0104] Optionally, the proximal end of the intermediate tube passes through the connecting sleeve of the second piston and is fixed to a support frame in the sliding sealing portion of the second piston, and the tube wall of the intermediate tube is provided with an adaptive exhaust hole that matches the position of the second exhaust hole.

[0105] Optionally, the proximal end of the intermediate tube is fixed to a support frame in the fixed sealing portion of the second piston.

[0106] Optionally, the balancing hole is provided on the sealing sleeve, and the support frame is provided with an avoidance groove for the balancing valve core to pass through.

[0107] Optionally, the support frame includes:

[0108] an annular portion connected to the axial end of the connecting sleeve;

[0109] A support disk is fixed to the outer periphery of the annular portion, and the sealing sleeve is wrapped around the support disk.

[0110] Optionally, the support plate is a circular plate with a frame structure.

[0111] Optionally, the balancing valve core includes:

[0112] The linkage rod slides through the balancing holes on the fixed sealing part and the sliding sealing part, and is clearance-matched at the penetration part;

[0113] Two sealing heads are respectively fixed at the two ends of the linkage rod, and the balance hole is closed or opened correspondingly under the action of the pressure on both sides of the piston.

[0114] Optionally, the sealing head is spherical, and the fixed sealing part and the sliding sealing part are respectively provided with a recessed area on the outer periphery of the balancing hole on the opposite sides thereof, and the sealing head is abutted against the recessed area when closing the balancing hole.

[0115] Optionally, a protective tube is further sleeved on the exterior of the second pipe member, and a proximal end of the protective tube is fixed to the control handle.

[0116] Optionally, a fixing sleeve is installed on the control handle, the proximal end of the protection tube is sealingly connected to the distal end of the fixing sleeve, and the proximal end of the second pipe member passes through the protection tube and then passes through the fixing sleeve and further extends into the first hydraulic chamber.

[0117] Optionally, the proximal end of the fixed sleeve is in sliding and sealing fit with the outer wall of the second pipe fitting, the radial clearance between the protection pipe and the second pipe fitting is a third exhaust clearance, and a third exhaust hole communicating with the third exhaust clearance is formed in the side wall of the fixed sleeve.

[0118] Optionally, the third exhaust hole is connected to the hydraulic drive circuit.

[0119] Optionally, the hydraulic drive circuit includes:

[0120] A hydraulic pipeline for providing a liquid passage;

[0121] A drive pump connected to the hydraulic pipeline for driving the flow of liquid;

[0122] A multi-way switching valve having a drive-side interface connected to the outlet and inlet of the drive pump, and a plurality of working-side interfaces, wherein two working-side interfaces are connected to the first hydraulic chamber, and another working-side interface is connected to the third exhaust hole;

[0123] The multi-way switching valve has a plurality of gears and is used to switch the communication relationship between the drive-side interface and different working-side interfaces to control the liquid flow direction.

[0124] Optionally, an installation head for connecting an interventional device is provided on the first pipe fitting, a lock hole is provided on the installation head, a lock is fixed at the distal end of the intermediate pipe fitting, the lock is inserted into the lock hole in the locked state, and the interventional device itself or is tied to the lock through a traction cable, and the lock disengages from the lock hole in the unlocked state to release the interventional device.

[0125] Optionally, the lock is rod-shaped, a connection seat is fixed inside the intermediate pipe fitting, the proximal end of the lock is inserted and fixed in the connection seat, and the distal end of the lock cooperates with the lock hole through the axial movement of the intermediate pipe fitting.

[0126] Optionally, the lock is a plurality of straight rods arranged side by side.

[0127] The hydraulic-driven interventional device delivery system of the present application adopts a hydraulic drive mode, which is convenient and fast to use, and different functions can also be switched through the hydraulic drive circuit. Description of the Drawings

[0128] Figure 1 It is a schematic structural diagram of an embodiment of the interventional device delivery system of the present application;

[0129] Figure 2a It is a schematic structural diagram of the distal part of the interventional device delivery system of the present application;

[0130] Figure 2bSchematic diagram of the interventional device adopted in an embodiment of the present application;

[0131] Figure 2c Schematic diagram of the interventional device adopted in another embodiment of the present application;

[0132] Figure 2d Schematic diagram of the loading state of the interventional device;

[0133] Figure 2e Schematic diagram of the semi - release state of the interventional device;

[0134] Figure 2f Schematic diagram of the release state of the interventional device;

[0135] Figure 3 Schematic diagram of the proximal part of the interventional device delivery system of the present application;

[0136] Figure 4 For Figure 3 Schematic diagram of the internal structure of the interventional device delivery system (part of the outer shell is hidden);

[0137] Figure 5 Schematic diagram of the internal structure of another embodiment of the interventional device delivery system of the present application;

[0138] Figure 6 For Figure 5 Schematic diagram of the structure of the interventional device delivery system after moving two cylinders;

[0139] Figure 7 For Figure 5 Schematic diagram of the distal part of the interventional device delivery system;

[0140] Figure 8 For Figure 5 Schematic diagram of the internal structure of the interventional device delivery system after omitting two cylinders;

[0141] Figure 9 For Figure 8 Schematic diagram of the change in the positions of the two pistons of the interventional device delivery system;

[0142] Figure 10 Schematic diagram of the structure of two cylinders in an embodiment of the interventional device delivery system of the present application;

[0143] Figure 11 For Figure 10 Schematic diagram of the two cylinders from another angle;

[0144] Figure 12 For Figure 10 Exploded view of the two cylinders (with a component fixing sleeve added);

[0145] Figure 13 is Figure 10 the side view of two cylinders in

[0146] Figure 14 is Figure 13 the A-A cross-sectional view in

[0147] Figure 15 the structural schematic diagram of the liquid storage tank in an embodiment of the intervention device delivery system of the present application;

[0148] Figure 16 the structural schematic diagram of the drive pump part in an embodiment of the intervention device delivery system of the present application;

[0149] Figure 17 is Figure 16 the structural schematic diagram of the pump housing of the drive pump in

[0150] Figure 18 is Figure 16 the structural schematic diagram of the working part of the drive pump in

[0151] Figure 19 the structural schematic diagram of the multi-way switching valve in an embodiment of the intervention device delivery system of the present application;

[0152] Figure 20 is Figure 19 the exploded view of the multi-way switching valve in

[0153] Figure 21 is Figure 19 the schematic diagram of the multi-way switching valve installed on the control handle in

[0154] Figure 22 is Figure 19 the structural schematic diagram of the valve core of the multi-way switching valve in

[0155] Figure 23 is Figure 22 the structural schematic diagram of the valve core from another angle in

[0156] Figure 24 is Figure 19 the structural schematic diagram of the multi-way switching valve from another angle in

[0157] Figure 25 the structural schematic diagram of the fixing sleeve in an embodiment of the intervention device delivery system of the present application;

[0158] Figure 26 is Figure 25 the schematic diagram of the fixing sleeve from another angle in

[0159] Figure 27 the cross-sectional view of the fixing sleeve part in an embodiment of the intervention device delivery system of the present application;

[0160] Figure 28 Cross-sectional view of the first piston part in an embodiment of the intervention device delivery system of the present application;

[0161] Figure 29 Cross-sectional view of the second piston part in an embodiment of the intervention device delivery system of the present application;

[0162] Figure 30 Partial schematic view of two piston parts in an embodiment of the intervention device delivery system of the present application;

[0163] Figure 31 Schematic structural view of the first piston in an embodiment of the intervention device delivery system of the present application;

[0164] Figure 32 is Figure 31 Schematic structural view of the first piston from another angle in

[0165] Figure 33 is Figure 31 Exploded view of the first piston in

[0166] Figure 34 is Figure 31 Schematic structural view of the first piston with the sealing sleeve omitted in

[0167] Figure 35 is Figure 34 Schematic structural view of the first piston with the sealing sleeve omitted from another angle in

[0168] Figure 36 Schematic diagram of the hydraulic working principle in an embodiment of the intervention device delivery system of the present application;

[0169] Figure 37 is Figure 36 Enlarged view of part of gear D1 in

[0170] Figure 38 Schematic diagram of the hydraulic working principle in another embodiment of the intervention device delivery system of the present application;

[0171] Figure 39 Schematic diagram of the hydraulic working principle in another embodiment of the intervention device delivery system of the present application;

[0172] Figure 40 Schematic structural view of the distal part in an embodiment of the intervention device delivery system of the present application;

[0173] Figure 41 is Figure 40 Schematic view of the locking part in the locked state in

[0174] Figure 42 is Figure 41 Schematic view of the locking part in the unlocked state in

[0175] Figure 43 is Figure 42 a schematic diagram after omitting the intermediate pipe fitting in

[0176] Figure 44 a schematic structural diagram of the distal part (lock in the locked state) in another embodiment of the interventional device delivery system of the present application;

[0177] Figure 45 is Figure 44 a schematic diagram of the lock in the unlocked state in

[0178] Figure 46 is Figure 45 a schematic diagram after omitting the intermediate pipe fitting in

[0179] Figure 47 a schematic structural diagram of the distal part in another embodiment of the interventional device delivery system of the present application;

[0180] Figure 48 is Figure 47 a schematic diagram of the lock in the locked state in

[0181] Figure 49 is Figure 48 a schematic diagram of the lock in the unlocked state in

[0182] Figure 50 is Figure 49 a schematic diagram after omitting the intermediate pipe fitting in

[0183] The descriptions of the reference numerals in the figure are as follows:

[0184] 1. Pipe fitting;

[0185] 11. First pipe fitting; 111. Guide head; 112. Mounting head; 113. Pipeline joint; 114. Fastening sleeve; 115. Lock hole; 116. Threading hole; 117. Positioning card slot; 118. Positioning protrusion; 119. Auxiliary component; 12. Second pipe fitting; 121. Loading section; 122. Fastening sleeve; 13. Intermediate pipe fitting; 131. Lock; 132. Connection seat; 133. Fastening sleeve; 134. Binding wire; 135. Wire loop; 14. Protection tube;

[0186] 2. Control handle;

[0187] 21. Working part; 211. Distal end; 212. Proximal end; 22. Holding part; 23. Positioning component; 24. First half shell; 25. Second half shell; 26. Positioning post;

[0188] 3. Cylinder barrel;

[0189] 31. First cylinder barrel; 311. First hydraulic chamber; 312. First chamber; 313. Second chamber; 314. Communication port; 315. Communication port; 32. Second cylinder barrel; 321. Second hydraulic chamber; 322. Third chamber; 323. Fourth chamber; 324. Communication port; 325. Communication port; 33. Hydraulic pipeline; 331. First check valve; 332. Second check valve; 34. Isolation seal; 35. Distal end seal plug; 36. Proximal end seal plug;

[0190] 4. First piston;

[0191] 41. Fixed seal part; 42. Sliding seal part; 43. Connecting sleeve; 431. First air passage gap; 432. Reinforcing rib; 44. Support frame; 441. Avoidance groove; 45. Sealing sleeve; 451. Concave area; 46. First exhaust hole; 47. Balance hole; 48. Balance spool; 481. Linking rod; 482. Sealing head; 49. Through hole;

[0192] 5. Driving pump;

[0193] 51. Pump housing; 52. Working part; 53. Driving part; 531. Shaft hole; 54. Inlet; 55. Outlet; 56. Transfer port; 57. Pump chamber;

[0194] 6. Multi-way switching valve;

[0195] 61. Valve seat; 62. Spool; 63. Wrench; 64. Mark; 65. Interface; 66. Flow channel; 67. Driving side interface; 68. Working side interface;

[0196] 7. Liquid storage tank;

[0197] 71. Liquid injection port; 72. Liquid injection joint; 73. Inlet; 74. Outlet;

[0198] 8. Fixed sleeve;

[0199] 81. Through hole; 82. Third exhaust hole; 83. Positioning groove; 84. Storage cavity;

[0200] 9. Second piston;

[0201] 91. Fixed seal part; 92. Sliding seal part;

[0202] 10. Bracket;

[0203] 101. Connecting ear. Detailed implementation mode

[0204] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0205] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time.

[0206] It should be noted that the terms "proximal end" and "distal end" are relative to the operator. For example, in a catheter or sheath tube involved in the text, the "proximal end" refers to the end close to the operator, that is, the end that enters the body away from the lesion during use (for example, the end of the catheter connected to the control handle), while the "distal end" is the end away from the operator, that is, the end that enters the body close to the lesion during use (for example, the position at the end of the catheter). Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0207] This delivery system can be used to treat heart valves (for example, mitral valve, aortic valve, tricuspid valve, and / or pulmonary valve). The treatment can include, but is not limited to, valve replacement, valve repair, or other surgeries that affect valve function. The system and method can use a transcatheter approach, such as delivering the catheter system through a venous or femoral artery approach; or other minimally invasive surgical methods, including but not limited to delivering the catheter through an apical approach.

[0208] See Figure 1 , the interventional device delivery system of one embodiment of the present application includes a catheter system. The catheter system includes a plurality of pipe fittings 1 coaxially arranged from the inside to the outside, and a control handle 2 for driving the relative movement of the plurality of pipe fittings 1. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings are connected to the control handle 2. The relative movement of the pipe fittings is driven by a hydraulic method at the control handle 2.

[0209] The present application uses hydraulic means at the control handle to drive each pipe fitting to realize the operation of the interventional instrument, such as release, cutting, rotation, grasping or recovery. The entire hydraulic system is configured at the proximal end, which is more convenient for on-site debugging or assembly. Even if unexpected conditions occur, they can be easily resolved in vitro. If the hydraulic mechanism is configured at the distal end, more stringent requirements will be placed on the size and safety of the equipment, and the movement form and direction that can be controlled will also be limited due to equipment problems.

[0210] Multiple pipes are understood to be at least two. Specifically, any two pipes can be slidably fitted together, that is, all parts between the two pipes have axial relative displacement during movement. Of course, if a deformable connector is additionally provided between the two pipes, the relative movement relationship of the connector shall be considered separately.

[0211] It is also possible that two of the pipes, for example, two pipes that are radially adjacent, are partially fixedly connected (for example, fixed to each other at the distal end). Since the two pipes are only fixed to each other at the distal end, a small amount of relative displacement between the two pipes is allowed at the proximal end. Of course, this relative movement will be transmitted to the distal end and cause one of them to deform and bend. This feature can be used to achieve bending of the distal end of a pipe.

[0212] The number of the tubes 1 can be two, three or more. The relative movement of different tubes 1 at the distal end (away from the operator, that is, the end that enters the body close to the lesion when in use, and vice versa at the proximal end) can realize the corresponding operation of the interventional instrument, such as delivery, release, posture adjustment, recovery, etc. As for the realization of each tube 1 itself and the distal function, it can be implemented according to conventional technology. Of course, improvements on the distal structure of the tube are also provided below. One of the key points of this application is to use a liquid drive method at the operating handle to drive the relative movement of different tubes.

[0213] See also Figure 2a In one embodiment, the plurality of pipes include a first pipe 11 and a second pipe 12 which are slidably nested from the inside to the outside. The distal end of the first pipe 11 is used to place the interventional instrument. When the two pipes move relative to each other, the distal end of the second pipe 12 wraps or releases the interventional instrument. The proximal end of the second pipe 12 may also be covered with a protective tube ( Figure 1 , 2a not shown).

[0214] The farthest end of the first tube 11 is the guide head 111, and a mounting head 112 is also fixed at the proximal end of the guide head 111. When the interventional instrument is loaded, it is located between the guide head 111 and the mounting head 112 and is radially compressed. The interventional instrument generally has a connecting ear, and the outer wall of the mounting head is usually provided with a groove or a protrusion for matching with the connecting ear of the interventional instrument. When loading, the connecting ear is engaged with the groove of the mounting head 112 or hung on the protrusion to limit the axial position of the interventional instrument. For more fixing methods of the connecting ear and the mounting head, please refer to the WO2019080857A1 patent.

[0215] See also Figure 2b , Figure 2c The interventional device described in the present application is not strictly limited in specific shape, for example, it may include a stent 10 with a connecting ear 101 at one axial end of the stent 10, the connecting ear 101 may have an expansion head at the end, or may have an annular or C-shaped connecting portion.

[0216] The stent 10 is a radially compressible or expandable structure, and is generally a mesh tube structure formed by cutting or weaving.

[0217] Combination Figures 2d - 2f The distal end of the second tube 12 is the loading section 121. In the loading state, the interventional device is radially compressed. The loading section 121 is wrapped around the outer periphery of the interventional device to limit the radial expansion of the interventional device. After the interventional device is in place, the second tube 12 is driven by the control handle to slide axially relative to the first tube 11, so that the interventional device is gradually exposed in the human body vessels to allow the interventional device to expand radially. The interventional device enters a semi-released state from the expansion of the distal end. As the second tube 12 is further withdrawn, the interventional device is fully exposed. Finally, the connection ear of the interventional device is separated from the installation head and enters a released state, completing the release of the interventional device. During the whole process, the axial relative sliding of the first tube 11 and the second tube 12 is driven by the control handle 2.

[0218] The first tube 11 and the second tube 12 are plastic tubes or metal tubes commonly used in the field of interventional instruments, such as cut hypotubes or metal braided tubes or a mixture of metal braided tubes and hypotubes. The first tube 11 and / or the second tube 12 can also be multi-layer composite tubes.

[0219] In one embodiment, a hydraulically driven interventional instrument delivery system includes a plurality of pipes 1 coaxially arranged from the inside to the outside, and a control handle 2 for driving the plurality of pipes 1 to move relative to each other, wherein the distal ends of the pipes 1 are used to cooperate with each other to operate the interventional instrument, and the proximal ends of the pipes 1 are connected to the control handle 2, and the control handle 2 is hydraulically driven to drive the pipes 1 to move relative to each other;

[0220] The control handle 2 is provided with one or more hydraulic chambers, and pistons are slidably installed in each hydraulic chamber respectively. Two pipe fittings 1 adjacent in the radial direction include an outer pipe fitting and an inner pipe fitting. The outer pipe fitting enters one of the hydraulic chambers and is fixed to the piston in this hydraulic chamber, and the inner pipe fitting extends and is connected to the pistons in other hydraulic chambers or is fixed to the control handle 2.

[0221] See Figure 3 , Figure 4 , the control handle 2 is provided with a hydraulic chamber, namely the first hydraulic chamber 311. Two pipe fittings adjacent in the radial direction are respectively the first pipe fitting 11 and the second pipe fitting 12 sleeved outside it. The outer second pipe fitting 12 enters the first hydraulic chamber 311 and is fixed to the first piston 4 in the first hydraulic chamber 311, and the inner first pipe fitting 11 extends out of the first hydraulic chamber 311 and is fixed to the control handle 2.

[0222] The shape of the control handle 2 is not strictly limited. In order to facilitate the encapsulation of other components, a split structure can be adopted, that is, the control handle 2 includes a first half shell 24 and a second half shell 25 that are buckled with each other. Of course, in order to facilitate local maintenance or operation, it can also be divided into more parts.

[0223] In order to facilitate the mutual fixation between the first half shell 24 and the second half shell 25, various methods such as buckles and fasteners 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 post 26, and a screw hole is provided on the positioning post 26, and the other is correspondingly provided with a mounting hole for passing through a bolt, and the two are fixed by bolts;

[0224] Or both are provided with positioning posts 26 and the positions are matched. The positioning post of one has a positioning hole, and the positioning post of the other is directly inserted into the correspondingly positioned positioning hole.

[0225] In other embodiments, the first half shell 24 and the second half shell 25 can also be fixed by bonding or welding.

[0226] In different embodiments, the hydraulic chamber is directly opened inside the control handle 2, or the control handle 2 is fixedly installed with a cylinder barrel 3, and the inside of the cylinder barrel 3 is the hydraulic chamber. The cross-section of the cylinder barrel 3 is not strictly limited. Preferably, the outer circumference is surrounded by a smooth curve, such as a circle or an ellipse. Taking the cross-section as a circle as an example, it can be seen from the figure that its whole is cylindrical.

[0227] In this embodiment, a first cylinder barrel 31 is fixedly installed inside the control handle 2, the hydraulic chamber inside the first cylinder barrel 31 is the first hydraulic chamber 311, and the piston in the hydraulic chamber is the first piston 4 slidably installed in the first hydraulic chamber 311.

[0228] To protect the first cylinder 31, the first half shell 24 and the second half shell 25 enclose and clamp the first cylinder 31. In a preferred embodiment, a positioning component 23 that cooperates with the first cylinder 31 is provided on the control handle 2. For example Figure 4 it can be seen in Figure 4 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.

[0229] Although the shape of the control handle 2 is not strictly limited, for ease of operation, in a preferred embodiment, the control handle 2 includes a working part 21 and a holding part 22 connected to the working part 21. The first cylinder 31 is located within the working part 21, that is, the working part 21 as a whole is used to provide the first hydraulic cavity 311. The working part 21 has opposite distal end 211 and proximal end 212.

[0230] The working part 21 and the holding part 22 adopt an integral structure or a detachable connection to reduce the volume for easy storage. The connection part between the working part 21 and the holding part 22 can adopt methods such as snap fit or threading for quick assembly.

[0231] The shape of the holding part 22 is convenient for holding and operating. For example, it has a length direction as a whole. Since the cylinder is installed in the working part 21 and the movement direction of the piston in the cylinder is the axial direction of the cylinder, in this embodiment, the length direction of the holding part 22 is generally perpendicular to the axial direction of the cylinder, or slightly obliquely intersects. As for the two parts of the working part 21 and the holding part 22, as a whole, it is in an L shape. To further improve the holding feel and conform to the shape characteristics of the hand, in this embodiment, the overall shape of the control handle 2 is similar to the shape of a pistol. Hydraulic drive control components, such as switches, can be arranged on the holding part 22 for easy one-handed operation.

[0232] In other embodiments, the length direction of the holding part 22 can also be generally parallel to the axial direction of the cylinder, or even aligned with each other. Then the overall shape of the control handle 2 is strip-shaped.

[0233] In a preferred embodiment, the holding part 22 is connected to the proximal end 212 of the working part 21. And each pipe fitting passes through the control handle 2 from the distal end 211 of the working part 21 and further extends distally.

[0234] In order to drive the relative movement of the pipe fittings hydraulically, in an embodiment of the present application, the connection method of the pipe fittings and the piston is further improved. The pipe fittings are directly inserted into the cylinder, making the structure further compact and improving the integration degree.

[0235] See Figure 4(In the figure, the first cylinder 31 is moved out to avoid interference between components. Regarding the hydraulic chamber and each chamber, the relative position with the piston is still used as a reference for illustration. The same applies to other relevant views.) In this embodiment, the hydraulic chamber is the first hydraulic chamber 311; the piston is the first piston 4 slidably installed in the first hydraulic chamber 311. The proximal end of the second pipe fitting 12 penetrates into the first hydraulic chamber 311 and is fixedly connected to the first piston 4. The proximal end of the first pipe fitting 11 passes through the first piston 4 via the second pipe fitting 12 and further extends until it is fixedly connected to the control handle 2.

[0236] Relative to the working part 21 of the control handle 2, the second pipe fitting 12 extends into the first hydraulic chamber 311 from the distal end 211 of the working part 21, and the first pipe fitting 11 extends and is connected to the proximal end 212 of the working part 21.

[0237] Since the proximal end of the first pipe fitting 11 is fixedly connected to the control handle 2, when the first piston 4 moves, it can drive the second pipe fitting 12 to axially slide relative to the first pipe fitting 11, and corresponding functions are realized at the distal ends of the two pipe fittings.

[0238] Specifically, the first piston 4 divides the first hydraulic chamber 311 into a first chamber 312 and a second chamber 313. Each chamber is connected to the hydraulic drive circuit through corresponding communication ports. The proximal end of the second pipe fitting 12 penetrates into the first chamber 312 and is fixedly connected to the first piston 4. The proximal end of the first pipe fitting 11 passes through the first piston 4 via the second pipe fitting 12, and then extends out of the first hydraulic chamber 311 through the second chamber 313.

[0239] Of course, as a hydraulic drive method, sealing treatment is required at the parts where each pipe fitting enters and exits the first cylinder 31. According to the movement relationship between the pipe fitting and the first cylinder 31, fixed sealing or sliding sealing is adopted accordingly.

[0240] Each communication port is arranged on the first cylinder 31. The hydraulic drive circuit is used to drive the first piston 4 in the first cylinder 31 to reciprocate. Necessary controller components such as pumps and valves can be arranged on the hydraulic drive circuit as needed. In order to further improve the integration, in one embodiment, the hydraulic drive circuit is configured on the control handle 2 to drive the first piston 4 to make the pipe fittings move relative to each other.

[0241] The interior of the first pipe fitting 11 can be used to thread a guide wire, etc. Therefore, the proximal end of the first pipe fitting 11 is fixed to the control handle 2. In one embodiment, a pipe joint 113 is installed at the proximal end of the working part 21, and the first pipe fitting 11 extends and is connected to the pipe joint 113. The pipe joint 113 can specifically adopt a Luer joint and be butt-connected and communicated with the first pipe fitting 11. Saline can also be introduced into the first pipe fitting 11 through the pipe joint 113 as needed to perform an exhaust operation. The proximal end of the first pipe fitting 11 can be directly fixed to the pipe joint 113 or connected to the pipe joint 113 through a fastening sleeve 114. The fastening sleeve 114 can be filled between the outer wall of the first pipe fitting 11 and the inner wall of the pipe joint 113 to achieve fastening and sealing.

[0242] In Figures 5 - 9 the embodiment, the control handle 2 is provided with two hydraulic chambers, namely a first hydraulic chamber 311 and a second hydraulic chamber 321. The multiple pipe fittings include a first pipe fitting 11, an intermediate pipe fitting 13, and a second pipe fitting 12 that are slidably nested with each other from the inside out;

[0243] Two pipe fittings adjacent in the radial position can be regarded as two groups with different reference objects:

[0244] The first group is the intermediate pipe fitting 13 and the second pipe fitting 12 sleeved outside it. The second pipe fitting 12 in the outer layer enters the first hydraulic chamber 311 and is fixed to the first piston 4 in the first hydraulic chamber 311. The intermediate pipe fitting 13 in the inner layer extends out of the first hydraulic chamber 311 and is connected to the second piston 9 in the second hydraulic chamber 321.

[0245] The second group is the first pipe fitting 11 and the intermediate pipe fitting 13 sleeved outside it. The intermediate pipe fitting 13 in the outer layer enters the second hydraulic chamber 321 and is fixed to the second piston 9 in the second hydraulic chamber 321. The first pipe fitting 11 in the inner layer extends out of the second hydraulic chamber 321 and is fixed to the control handle 2.

[0246] A first cylinder 31 and a second cylinder 32 are installed in the control handle 2. The two cylinders respectively provide the first hydraulic chamber 311 and the second hydraulic chamber 321. The first cylinder 31 and the second cylinder 32 are coaxially arranged and butt-connected. An isolation seal 34 is provided at the butt-joint part. The proximal end of the intermediate pipe fitting 13 slidably seals through the isolation seal 34 and enters the second hydraulic chamber 321.

[0247] The multiple pipe fittings that are slidably nested with each other from the inside out are three, among which:

[0248] The distal end of the first pipe fitting 11 is used to place the interventional instrument;

[0249] The distal end of the intermediate pipe fitting 13 is provided with a lock for restricting the interventional instrument to the first pipe fitting 11. The axial sliding of the intermediate pipe fitting 13 relative to the first pipe fitting 11 can cause the lock to change the cooperation relationship with the mounting head on the first pipe fitting 11;

[0250] The distal end of the second pipe fitting 12 is provided with a loading section for wrapping or releasing the interventional device.

[0251] The first pipe fitting 11 and the interventional device can be separated from each other in the body, that is, the interventional device remains in the body; they can also be connected to each other. After the operation is completed, the interventional device does not remain in the body but is withdrawn to the outside of the body together with the first pipe fitting 11.

[0252] In one embodiment, the distal end of the intermediate pipe fitting 13 can be fixedly connected to the first pipe fitting 11 for traction and bending adjustment to change the posture of the interventional device so as to facilitate accurate positioning. The connection part of the intermediate pipe fitting 13 and the first pipe fitting 11 at the distal end can be adjacent to the mounting head on the first pipe fitting 11, for example, on the proximal side of the mounting head. Of course, the distal end of the intermediate pipe fitting 13 can also be directly fixed to the mounting head.

[0253] At the second cylinder 32, the second piston 9 divides the second hydraulic cavity 321 into a third chamber 322 and a fourth chamber 323. Each chamber is connected to the hydraulic drive circuit through the corresponding communication port. The proximal end of the intermediate pipe fitting 13 penetrates into the third chamber 322 and is fixedly connected to the second piston 9. The proximal end of the first pipe fitting 11 passes through the second piston 9 via the intermediate pipe fitting 13 and then extends out of the second hydraulic cavity 321 via the fourth chamber 323.

[0254] The proximal end of the corresponding working part 21 is provided with a pipeline joint, and the first pipe fitting 11 extends and is connected to the pipeline joint 113.

[0255] The first chamber 312 and the second chamber 313 are divided according to the first piston 4, and the third chamber 322 and the fourth chamber 323 are divided according to the second piston 9. Since the positions of the two pistons can move, the volumes of the respective chambers also change accordingly and are not fixed.

[0256] Combined Figure 8 with Figure 9 , when only the first piston 4 moves distally, it drives the second pipe fitting 12 to move distally, while the positions of the first pipe fitting 11 and the intermediate pipe fitting 13 remain unchanged. The same is true when the first piston 4 moves proximally.

[0257] When only the second piston 9 moves distally, it drives the intermediate pipe fitting 13 to move distally, while the positions of the first pipe fitting 11 and the second pipe fitting 12 remain unchanged. The same is true when the second piston 9 moves proximally.

[0258] In one embodiment of the present application, in order to further improve the integration, a hydraulic drive circuit for driving the relative movement of each pipe fitting through the piston is further arranged at the control handle 2. Installing the hydraulic drive circuit on the control handle 2 can avoid using long external pipelines and reduce the interference of components during the handheld movement operation.

[0259] In one embodiment, the hydraulic drive circuit includes:

[0260] A hydraulic pipeline for providing a liquid passage communicating with each hydraulic chamber;

[0261] A drive pump 5 connected to the hydraulic pipeline for driving the flow of liquid;

[0262] A control valve connected to the hydraulic pipeline for controlling the flow direction of the liquid.

[0263] The hydraulic pipeline generally refers to the pipeline used to connect the components in the hydraulic drive circuit. Since the hydraulic drive circuit is arranged in the control handle 2, preferably all or most of the hydraulic pipelines are accommodated inside the control handle 2. In the drawings related to the specific structure in this application, the hydraulic pipelines are omitted. Since the connection relationship of each component has been clearly described, the hydraulic pipelines can be arranged as needed during the implementation process. Since the hydraulic pipelines generally use hoses, how to accommodate them inside the control handle 2 can be implemented as needed.

[0264] The hydraulic pipeline is filled with liquid during use, and the reciprocating movement of the piston is changed by the flow direction of the liquid. To improve safety, the liquid in the hydraulic drive circuit is physiological saline.

[0265] By arranging a corresponding control valve in the hydraulic drive circuit, the flow direction of the liquid can be controlled, the movement direction of the piston can be changed, or other auxiliary functions can be realized. For example, the control valve may include one-way valves respectively arranged at the outlet and inlet of the drive pump 5, and a multi-way switching valve 6 for switching the movement direction of the piston.

[0266] In order to buffer and temporarily store the liquid, in one embodiment, the hydraulic drive circuit further includes a liquid storage tank 7 connected to the hydraulic pipeline for temporarily storing the liquid. The liquid storage tank 7 can also be integrally installed inside the control handle 2. In order to pre-fill or fill the liquid on-site during use, the liquid storage tank 7 is provided with a liquid filling port 71.

[0267] The liquid storage tank 7 not only has inlets and outlets communicating with the hydraulic pipeline, but also can be separately provided with a liquid filling port 71. A valve can be separately arranged at the liquid filling port 71 for connecting an external liquid filling device. In addition, in a preferred embodiment, the liquid filling can also be realized by using the drive pump 5.

[0268] For example, in one embodiment, a liquid filling joint 72 is installed on the control handle 2. The liquid filling joint 72 communicates with the liquid filling port 71 through the drive pump 5 for filling the liquid storage tank 7 with liquid.

[0269] The external liquid filling device is connected to the liquid filling joint 72, and then the liquid is filled into the liquid storage tank 7 through the drive pump 5. In this way, the external pressurizing device can be omitted, and the liquid filling can be realized by making full use of the hydraulic drive circuit of the intervention device delivery system itself.

[0270] In one embodiment, the control valve includes:

[0271] A multi-way switching valve 6 having a driving-side interface communicating with the outlet and inlet of the driving pump 5, and a plurality of working-side interfaces, wherein every two working-side interfaces communicate with one of the hydraulic chambers. The multi-way switching valve 6 has a plurality of gears and is used to switch the communication relationship between the driving-side interface and different working-side interfaces to control the liquid flow direction.

[0272] The multi-way switching valve 6 can switch the communication relationship between each hydraulic chamber and the outlet and inlet of the driving pump 5 through different gears, thereby changing the movement direction of the piston. The two one-way valves can prevent unnecessary backflow of the liquid at the driving pump 5 and ensure the liquid delivery efficiency.

[0273] The driving-side interface and the working-side interfaces are only distinguished according to different communicating components. For the multi-way switching valve 6 itself, they are just a plurality of different interfaces.

[0274] In one embodiment, the control valve further includes:

[0275] Two one-way valves. The outlet of the driving pump 5 is connected to one of the driving-side interfaces through the first one-way valve; the inlet of the driving pump is connected to the other driving-side interface through the second one-way valve and the liquid storage tank 7 in sequence.

[0276] To further indicate the operation, the multi-way switching valve 6 is embedded in the control handle 2, and the control handle 2 is provided with a mark indicating the gear of the multi-way switching valve 6.

[0277] See Figures 10 - 14 , in one embodiment of the present application, the first cylinder 31 and the second cylinder 32 are arranged coaxially and are butt-jointed with each other through a sealing member 34. A distal sealing plug 35 is provided at the distal end of the first cylinder 31. The first cylinder 31 also has a communication port 314 and a communication port 315 connecting to the hydraulic drive circuit. A proximal sealing plug 36 is provided at the proximal end of the second cylinder 32. The second cylinder 32 also has a communication port 324 and a communication port 325 connecting to the hydraulic drive circuit.

[0278] The second pipe fitting 12 penetrates through the distal sealing plug 35 in a sliding seal manner and is connected to the first piston 4. The intermediate pipe fitting 13 and the first pipe fitting 11 extend out of the first piston 4 inside the second pipe fitting 12. The intermediate pipe fitting 13 further penetrates through the sealing member 34 in a sliding seal manner and is connected to the second piston 9. The first pipe fitting 11 extends out of the second piston 9 inside the intermediate pipe fitting 13, and then further penetrates through the proximal sealing plug 36 in a fixed seal manner and is connected to the control handle 2.

[0279] Combined with Figure 8 and Figure 9When only the first piston 4 moves distally, it drives the second pipe fitting 12 to move distally, while the intermediate pipe fitting 13 and the first pipe fitting 11 remain in place. Similarly, when the first piston 4 moves proximally.

[0280] When only the second piston 9 moves distally, it drives the intermediate pipe fitting 13 to move distally, while the first pipe fitting 11 and the second pipe fitting 12 remain in place. Similarly, when the second piston 9 moves proximally.

[0281] See Figure 15 , in one embodiment, the liquid storage tank 7 is a cylindrical structure with both ends closed. A liquid injection port 71 is provided at the bottom end of the liquid storage tank 7, and an inlet 73 and an outlet 74 are provided on the side wall, and are connected to the hydraulic drive circuit through the inlet 73 and the outlet 74.

[0282] See Figures 16 - 18 , in one embodiment, the drive pump 5 includes:

[0283] A pump housing 51 fixed to the control handle (the first half shell 24 of the control handle is shown in the figure) and connected to the hydraulic drive circuit;

[0284] A working member 52 movably installed in the pump housing 51 for driving the liquid to flow;

[0285] A driving member 53 movably installed on the control handle and linked with the working member 52.

[0286] The inside of the pump housing 51 is used to form a pump chamber 57. 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.

[0287] When it is required to be used in cooperation with the liquid injection port 71 of the liquid storage tank 7, a liquid injection joint 72 is also fixed on the first half shell 24, and a transfer port 56 communicating with the pump chamber 57 is provided on the corresponding pump housing 51. During liquid injection, the liquid sequentially passes through the liquid injection port 71, the transfer port 56 and enters the pump chamber 57, and then sequentially passes through the outlet 55 and the liquid injection port 71 and enters the liquid storage tank 7. A liquid injection pipeline can be separately configured for liquid injection, and necessary control valves are set to avoid interfering with the hydraulic drive circuit.

[0288] The working member 52 makes a linear reciprocating motion or a circular motion in the pump housing 51 to drive the liquid to flow. Common forms can adopt the form of an impeller or a plunger. In one embodiment, the working member 52 is a plunger, and the driving member 53 directly presses the plunger or is linked with the plunger through a transmission mechanism.

[0289] The driving member 53 is an electric member, a pneumatic member or a manual member. The function of the driving member 53 is to drive the working member 52 to move. The driving member 53 and the working member 52 can be integrally structured or separated and linked. According to the form of the power source, in order to simplify the structure, a manual member is preferably adopted, that is, the working member 52 is driven by manual operation. Of course, the basic functions can also be achieved by using electricity or pneumatic power.

[0290] In one embodiment, the manual member is an operating button that is slidably or rotatably mounted on the control handle.

[0291] In one embodiment, the driving member 53 has a shaft hole 531 and is mounted on the control handle through a rotating shaft. The control handle includes a working part for providing a hydraulic chamber and a holding part 22 connected to the working part. The operating button is mounted on the holding part 22, so that the driving pump 5 can be operated with one hand while holding.

[0292] In one embodiment, the driving pump 5 further includes a reset member acting between the operating button and the control handle. The driving member 53 and the working member 52 can be in abutting cooperation, and can also be connected by a limiting structure or a traction member, so that the working member 52 reciprocates simultaneously when the driving member 53 is reset. A reset member can be provided between the driving member 53 and the control handle, such as a compression spring or a tension spring acting on the driving member 53, or a torsion spring mounted on the rotating shaft part. In order to make the working member 52 reciprocate, the reset member can also act directly on the working member 52, such as a compression spring directly abutting against the working member 52 in the pump chamber 57. When in use, the driving member 53 is repeatedly pressed, and then the working member 52 is driven to make the liquid flow in the hydraulic driving circuit.

[0293] See Figures 19 - 24 , in one embodiment, the multi-way switching valve 6 includes a valve seat 61 and a valve core 62 that cooperate with each other. The valve seat 61 has a valve chamber, and a plurality of interfaces 65 are provided on the side wall of the valve chamber for connecting the driving pump and each hydraulic chamber. The valve core 62 is placed in the valve chamber and is in rotational cooperation. A plurality of flow channels 66 are provided on the outer peripheral wall of the valve core 62. When the valve core 62 rotates to different positions, there are corresponding communication relationships between the plurality of flow channels 66 and the plurality of interfaces 65. For the convenience of identification, in one embodiment, the multi-way switching valve 6 is embedded in the control handle 2, and a mark 64 indicating the gear position of the multi-way switching valve 6 is provided on the control handle 2.

[0294] The valve core 62 is connected with a wrench 63. When the wrench rotates to different angles, it points to the marks 64 of different gears. In this embodiment, in order to cooperate with the functions of different gears, seven flow channels 66 ( Figure 24 as indicated by the arrows in) are provided. Its specific functions are further described in other embodiments below. Of course, the number of flow channels 66 can also be increased or decreased according to the functions to be achieved.

[0295] Combined with Figure 6 , Figure 7 ,Figures 12 - 14 , Figures 25 - 27 , in one embodiment, in order to establish a stable intervention channel, a protective tube 14 is further sleeved outside the second pipe fitting 12, and the proximal end of the protective tube 14 is fixed to the control handle 2.

[0296] The protective tube 14 is fixedly installed relative to the control handle and is located on the outer periphery of the second pipe fitting 12. Implementing the intervention through the channel established by the protective tube 14 can avoid scratching the blood vessel when the second pipe fitting 12 reciprocates. The length of the protective tube 14, that is, the position of its distal end, can be determined according to the length of the intervention path. The proximal end of the protective tube 14 is fixed to the distal side of the control handle 2, and the proximal end of the second pipe fitting 12 passes through the protective tube 14 and then enters the first cylinder.

[0297] In order to facilitate the installation of the proximal end of the protective tube 14, in one embodiment, a fixing sleeve 8 is installed on the control handle. The proximal end of the protective tube 14 is hermetically docked with the distal end of the fixing sleeve 8, and the proximal end of the second pipe fitting 12 further extends into the first hydraulic chamber after passing through the fixing sleeve 8 via the protective tube 14.

[0298] The fixing sleeve 8 is provided with a through hole 81. The proximal end of the protective tube 14 extends into the through hole 81 and is hermetically and fixedly connected with the hole wall by means of bonding, welding, interference fit, etc. The fixing sleeve 8 and the control handle 2 can be fixed by means of clamping or using fasteners, etc. In one embodiment, an annular positioning groove 83 is provided on the outer periphery of the fixing sleeve 8, and the edges of the two half shells of the control handle 2 are clamped with the positioning groove 83. For example Figure 27 it can be seen that the corresponding part of the first half shell 24 is snapped into the positioning groove 83 to limit the axial position of the fixing sleeve 8.

[0299] Since the second pipe fitting 12 needs to reciprocate, the proximal end of the fixing sleeve 8 is in sliding seal fit with the outer wall of the second pipe fitting 12. Here, the sliding seal fit can be either that the inner wall of the through hole 81 is in direct contact with the outer wall of the second pipe fitting 12, or indirect fit through other components.

[0300] In one embodiment, the first cylinder is provided with a distal end seal plug 35. The proximal end of the fixing sleeve 8 is provided with a receiving cavity 84 communicating with the through hole 81. A part of the distal end seal plug 35 extends into the receiving cavity 84, and this part is hermetically filled between the fixing sleeve 8 and the outer wall of the second pipe fitting 12. That is, an indirect sliding seal fit is adopted. After the second pipe fitting 12 passes through the distal end seal plug 35 from the fixing sleeve 8, it enters the hydraulic chamber in the first cylinder.

[0301] Since the protective tube 14 and the second pipe fitting 12 need to slide relative to each other, a radial gap is sometimes reserved, and air needs to be exhausted from the radial gap during the operation.

[0302] In one embodiment, the proximal end of the fixed sleeve 8 is in sliding and sealing fit with the outer wall of the second pipe fitting 12. The radial clearance between the protection pipe 14 and the second pipe fitting 12 is the third exhaust clearance. The side wall of the fixed sleeve 8 is provided with a third exhaust hole 82 communicating with the third exhaust clearance.

[0303] The sliding and sealing fit portion between the proximal end of the fixed sleeve 8 and the outer wall of the second pipe fitting 12 serves as a sealing point. 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 exhaust will not affect the proximal side of the sealing point, that is, it will not affect the normal operation of the hydraulic chamber.

[0304] In order to make full use of the existing hydraulic drive circuit, the third exhaust hole 82 is connected to the hydraulic drive circuit. For example, one of the working side interfaces of the multi-way switching valve is connected to the third exhaust hole 82; the multi-way switching valve has multiple gears, and in one gear, the outlet of the drive pump is connected to the third exhaust hole 82, so that exhaust can be carried out by means of liquid perfusion.

[0305] See Figures 28 - 35 , pistons are respectively arranged in each hydraulic chamber. Each piston can adopt the same structure by itself. Only the positions and the pipe fittings passed through are different, but it does not affect its structural characteristics and working principle. The two pipe fittings adjacent in the radial direction include an outer pipe fitting and an inner pipe fitting. Each piston includes:

[0306] A fixed sealing portion, sleeved on the outer pipe fitting and fixedly and sealingly fitted with the outer wall of the outer pipe fitting;

[0307] A sliding sealing portion, sleeved on the inner pipe fitting and slidingly and sealingly fitted with the outer wall of the inner pipe fitting;

[0308] The fixed sealing portion and the sliding sealing portion are fixedly connected, and at least one of them is slidingly and sealingly fitted with the inner wall of the hydraulic chamber where it is located.

[0309] In one embodiment, the two pipe fittings adjacent in the radial direction include an outer pipe fitting, that is, the second pipe fitting 12, and an inner pipe fitting, that is, the intermediate pipe fitting 13. The first piston 4 includes:

[0310] A fixed sealing portion 41, sleeved on the second pipe fitting 12 and fixedly and sealingly fitted with the outer wall of the second pipe fitting 12;

[0311] A sliding sealing portion 42, sleeved on the intermediate pipe fitting 13 and slidingly and sealingly fitted with the outer wall of the intermediate pipe fitting 13;

[0312] The fixed sealing portion 41 and the sliding sealing portion 42 are fixedly connected, and the outer peripheries of both are slidingly and sealingly fitted with the inner wall of the first hydraulic chamber.

[0313] The first piston 4 is provided with a through hole extending along the axis. The proximal end of the second pipe fitting 12 is fixedly connected within the through hole by a fastening sleeve 122. On the one hand, the fastening sleeve 122 can fill the radial clearance, and on the other hand, it also facilitates axial positioning and assembly. The first piston 4 is fixedly connected to the second pipe fitting 12 and slidably cooperates with the intermediate pipe fitting 13. Therefore, when the first piston 4 moves, it can drive the second pipe fitting 12, but does not affect the position of the intermediate pipe fitting 13.

[0314] In one embodiment, two adjacent pipe fittings in the radial direction include an outer pipe fitting, i.e., the intermediate pipe fitting 13, and an inner pipe fitting, i.e., the first pipe fitting 11. The second piston 9 includes:

[0315] A fixed sealing portion 91, sleeved on the intermediate pipe fitting 13 and fixedly and sealingly cooperating with the outer wall of the intermediate pipe fitting 13;

[0316] A sliding sealing portion 92, sleeved on the first pipe fitting 11 and slidably and sealingly cooperating with the outer wall of the first pipe fitting 11;

[0317] The fixed sealing portion 91 and the sliding sealing portion 92 are fixedly connected, and the outer peripheries of both are slidably and sealingly cooperated with the inner wall of the second hydraulic chamber.

[0318] The second piston 9 is provided with a through hole extending along the axis. The proximal end of the intermediate pipe fitting 13 is fixedly connected within the through hole by a fastening sleeve 133. On the one hand, the fastening sleeve 133 can fill the radial clearance, and on the other hand, it also facilitates axial positioning and assembly. The second piston 9 is fixedly connected to the intermediate pipe fitting 13 and slidably cooperates with the first pipe fitting 11. Therefore, when the second piston 9 moves, it can drive the intermediate pipe fitting 13, but does not affect the position of the first pipe fitting 11.

[0319] The proximal end of the first pipe fitting 11 passes through the second hydraulic chamber and is fixedly connected to the pipeline joint 113 by a fastening sleeve 114.

[0320] The radial clearance between two adjacent pipe fittings in the radial direction is an exhaust clearance, and the hydraulic drive circuit is also connected to the exhaust clearance for exhaust. The auxiliary function of the hydraulic drive can be fully exerted, and exhaust is carried out by means of liquid perfusion, eliminating the need for additional exhaust equipment.

[0321] In order to combine the exhaust function, the present application further improves the structure of the piston.

[0322] In one embodiment, a balance hole is provided on the piston, and a balance valve core is installed at the position of the balance hole; an exhaust hole communicating with the exhaust clearance is also opened on the piston, and the exhaust hole is located between the fixed sealing portion and the sliding sealing portion; the piston divides the hydraulic chamber where it is located into two chambers. When the pressures in the two chambers approach, the balance valve core opens to connect the two chambers and the exhaust hole.

[0323] Since the two pistons have the same structure, the first piston 4 is taken as an example below, and the same is true for the second piston 9. The fixed sealing portion 41 and the sliding sealing portion 42 of the first piston 4 are fixed to each other through a connecting sleeve 43.

[0324] The fixed sealing part 41 and the sliding sealing part 42 both include a support frame 44 and a sealing sleeve 45 wrapped around the outside of the support frame 44 , and the connecting sleeve 43 is fixed between the two support frames 44 .

[0325] The radial gap between the second pipe fitting 12 and the intermediate pipe fitting 13 is the 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 connected to the first exhaust gap; a first air gap 431 connected to the first exhaust hole 46 is left between the outer wall of the connecting sleeve 43 in the first piston 4 and the inner wall of the first hydraulic chamber, and the axial position of the first air gap 431 is between the fixed sealing portion 41 and the sliding sealing portion 42 of the first piston 4.

[0326] A plurality of first exhaust holes 46 may be provided along the circumference of the connecting sleeve 43 to ensure smooth passage of liquid.

[0327] Similarly, the radial gap between the intermediate pipe member 13 and the first pipe member 11 is a second exhaust gap, and a second exhaust hole communicating with the second exhaust gap is formed on the side wall of the connecting sleeve in the second piston 9.

[0328] A second air gap connected to the second exhaust hole is left between the outer wall of the connecting sleeve in the second piston 9 and the inner wall of the second hydraulic chamber. The axial position of the second air gap is between the fixed sealing part 91 and the sliding sealing part 92 of the second piston 9.

[0329] In one embodiment, the support frame 44 includes:

[0330] An annular portion connected to the axial end of the connecting sleeve 43;

[0331] A support disk is fixed to the outer periphery of the annular portion, and a sealing sleeve 45 is wrapped around the support disk.

[0332] The annular portion and the connecting sleeve 43 may be an integral structure, that is, the two axial ends of the connecting sleeve 43 serve as the annular portion, and the supporting disk is a circular disk of a frame structure. In order to ensure strength, a plurality of reinforcing ribs 432 are provided on the outer circumference of the connecting sleeve 43, and the reinforcing ribs 432 are connected between the supporting frame 44 of the fixed sealing portion 41 and the sliding sealing portion 42.

[0333] Each support frame 44 and the seal sleeve 45 are provided with through holes 49. The connecting sleeve 43 in the support frame 44 is an axially penetrating structure, and the penetrating area serves as the through hole. The positions of the through holes 49 on the seal sleeve 45 correspond. Each through hole is used for threading a pipe fitting. Depending on the position of the piston, the pipe fitting that directly cooperates with the inner edge of the through hole may be the second pipe fitting 12, the intermediate pipe fitting 13, or the through hole through which the first pipe fitting 11 passes, and a sealed fit is achieved at the passing part. The outer periphery of each seal sleeve 45 is in sliding seal fit with the inner wall of the hydraulic chamber where it is located.

[0334] The fixed seal part 41 and the sliding seal part 42 are respectively provided with balance holes 47 communicating with the first air passage gap 431. Since the support disc is a frame structure, the balance holes 47 are directly opened on the seal sleeves 45 on each side. In order to avoid the balance valve core 48, the support frame 44 is provided with an avoidance groove 441 for the balance valve core 48 to penetrate through.

[0335] When the pressures on both sides of the first piston 4 are not equal, the liquid on the side with higher pressure will drive the balance valve core 48 to move to close the balance hole 47 on that side, and then push the first piston 4 to move towards the side with lower pressure.

[0336] When exhaust is required, liquid can be simultaneously input into the first chamber and the second chamber on both sides of the first piston 4 to make the pressures on both sides of the first piston 4 basically the same. At this time, the position of the balance valve core 48 is exactly in the middle, that is, the balance holes 47 on the fixed seal part 41 and the sliding seal part 42 are both in an open state. The liquid will enter the first air passage gap 431 through the balance holes 47 and then enter the first exhaust gap through the first exhaust hole 46 to achieve liquid perfusion and exhaust.

[0337] In an embodiment, the balance valve core 48 includes:

[0338] A linkage rod 481, slidingly penetrating through the balance holes 47 on the fixed seal part 41 and the sliding seal part 42, and having a clearance fit at the penetrating part;

[0339] Two seal heads 482, respectively fixed at both ends of the linkage rod 481, and correspondingly closing or opening the balance holes 47 under the action of the pressures on both sides of the piston.

[0340] In a preferred embodiment, in order to ensure the sealing effect, the seal head 482 is spherical. The opposite sides of the fixed seal part 41 and the sliding seal part 42 are respectively provided with recessed areas 451 located on the outer periphery of the balance holes 47. The seal head 482 abuts against the recessed area 451 when closing the balance hole 47.

[0341] According to the specific position of the proximal end of the second pipe fitting 12, the way the liquid enters the first exhaust gap from the first exhaust hole 46 is also slightly different.

[0342] In one embodiment, the proximal end of the second pipe fitting 12 passes through the connection sleeve 43 of the first piston 4 and is fixed to the support frame 44 in the sliding seal portion 42 of the first piston 4, that is, the second pipe fitting 12 has blocked the first exhaust hole 46 on the connection sleeve 43. At this time, an adaptive exhaust hole matching the position of the first exhaust hole 46 is formed in the pipe wall of the second pipe fitting 12.

[0343] In one embodiment, the proximal end of the second pipe fitting 12 is fixed to the first piston 4 through a fastening sleeve 122, and the fastening sleeve 122 is fixed to the support frame 44 in the sliding seal portion 42 of the first piston 4, that is, both the second pipe fitting 12 and the fastening sleeve 122 have blocked the first exhaust hole 46 on the connection sleeve 43. At this time, adaptive exhaust holes matching the position of the first exhaust hole 46 are formed on both the second pipe fitting 12 and the fastening sleeve 122.

[0344] In one embodiment, the proximal end of the second pipe fitting 12 is fixed to the support frame 44 in the fixed seal portion 41 of the first piston 4. That is, the second pipe fitting 12 does not block the first exhaust hole 46, and at this time, the first exhaust hole 46 can be directly communicated with the first exhaust gap.

[0345] At the second piston 9, the connection relationship of the proximal end of the intermediate pipe fitting 13 and the formation method of the adaptive exhaust hole are the same by analogy.

[0346] See Figures 36 - 37 , in one embodiment of the intervention device delivery system of the present application, two cylinders are adopted, namely a first cylinder 31 and a second cylinder 32. A first piston 4 with a balance valve core 48 is installed in the first cylinder 31, and the first cylinder 31 is provided with a communication port 314 and a communication port 315; a second piston 9 with a balance valve core is installed in the second cylinder 32, and the second cylinder 32 is provided with a communication port 324 and a communication port 325.

[0347] The pipe fittings moving axially relative to each other include a second pipe fitting fixedly connected to the first piston 4, an intermediate pipe fitting fixedly connected to the second piston 9, and a first pipe fitting fixedly connected to the control handle. In addition, a protective pipe located on the outer periphery of the second pipe fitting is connected to the control handle through a fixing sleeve 8, and the fixing sleeve 8 is provided with a third exhaust hole 82.

[0348] A multi-way switching valve 6, a driving pump 5 with an inlet 54 and an outlet 55, and a liquid storage tank 7 with an inlet 73 and an outlet 74 are also configured in the hydraulic drive circuit. A first one-way valve 331 is connected to the inlet 54 of the driving pump 5; a second one-way valve 332 is connected to the outlet 55 of the driving pump 5. Each component is communicated through a corresponding hydraulic pipeline 33.

[0349] In this embodiment, the multi-way switching valve 6 has a total of seven interfaces. Two of them are drive-side interfaces 67, which are respectively connected to the outlet and inlet of the drive pump 5 (indirectly connected through check valves and a liquid storage tank). The other five of the multi-way switching valve 6 are working-side interfaces 68. Inside the multi-way switching valve 6, corresponding drive-side interfaces 67 and working-side interfaces 68 can be connected through multiple flow channels 66 on the valve core. Based on different connection relationships, it can be divided into seven gears D1 to D7, and each gear realizes different functions.

[0350] Specifically, the functions of each gear are as follows:

[0351]

[0352] In gears D5 and D6, the chambers on both sides of the piston are simultaneously connected to the outlet 55 of the drive pump 5, that is, liquid is simultaneously introduced, so that the balance valve core is centered and all balance holes are opened, enabling the liquid to be poured into the corresponding exhaust gaps.

[0353] See Figure 38 , in another embodiment, only the first cylinder 31 is adopted. A first piston 4 with a balance valve core 48 is installed inside the first cylinder 31. The first cylinder 31 is provided with a communication port 314 and a communication port 315.

[0354] The pipe fittings moving axially relative to each other include a second pipe fitting fixedly connected to the first piston 4 and a first pipe fitting fixedly connected to the control handle.

[0355] A multi-way switching valve 6, a drive pump 5 with an inlet 54 and an outlet 55, and a liquid storage tank 7 with an inlet 73 and an outlet 74 are also configured in the hydraulic drive circuit. 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 is connected through a corresponding hydraulic pipeline 33.

[0356] In this embodiment, the multi-way switching valve 6 has a total of four interfaces. Two of them are drive-side interfaces, which are respectively connected to the outlet and inlet of the drive pump 5 (indirectly connected through check valves and a liquid storage tank). The other two of the multi-way switching valve 6 are working-side interfaces. Based on different connection relationships, it can be divided into three gears D1 to D3, and each gear realizes different functions.

[0357] Specifically, the functions of each gear are as follows:

[0358]

[0359] In gear D3, the chambers on both sides of the piston are simultaneously connected to the outlet 55 of the drive pump 5, that is, liquid is simultaneously introduced, so that the balance valve core is centered and all balance holes are opened, enabling the liquid to be poured into the gap between the second pipe fitting and the first pipe fitting for exhaust.

[0360] See Figure 39 Figure 39 , in another embodiment, only the first cylinder 31 is adopted. A first piston 4 with a balance spool 48 is installed in the first cylinder 31. The first cylinder 31 is provided with a communication port 314 and a communication port 315.

[0361] The pipe fittings moving axially relative to each other include a second pipe fitting fixedly connected to the first piston 4 and a first pipe fitting fixedly connected to the control handle.

[0362] A protective tube located on the outer periphery of the second pipe fitting is also connected to the control handle through a fixing sleeve 8. The fixing sleeve 8 is provided with a third exhaust hole 82.

[0363] In the hydraulic drive circuit, a multi-way switching valve 6, a drive pump 5 with an inlet 54 and an outlet 55, and a liquid storage tank 7 with an inlet 73 and an outlet 74 are also configured. A first one-way valve 331 is connected to the inlet 54 of the drive pump 5; a second one-way valve 332 is connected to the outlet 55 of the drive pump 5. Each component is connected through a corresponding hydraulic pipeline 33.

[0364] In this embodiment, the multi-way switching valve 6 has a total of five interfaces. Two of them are drive-side interfaces, which are respectively connected to the outlet and inlet of the drive pump 5 (indirectly connected through one-way valves and the liquid storage tank). The other three interfaces of the multi-way switching valve 6 are working-side interfaces. Based on different connection relationships, they can be divided into four gears D1 - D4, and each gear realizes different functions.

[0365] Specifically, the functions of each gear are as follows:

[0366]

[0367] In gear D3, the chambers on both sides of the piston are simultaneously connected to the outlet 55 of the drive pump 5, that is, liquid is simultaneously introduced, so that the balance spool is centered, all balance holes are opened, and the liquid can be poured into the exhaust gap between the second pipe fitting and the first pipe fitting.

[0368] See Figures 40 - 43 Figures 40 - 43 , the control handle can realize relevant operations on the interventional instrument at a distance by driving the relative movement of each pipe fitting. In one embodiment, an installation head 112 for connecting the interventional instrument is provided on the first pipe fitting 11, and a lock hole 115 is provided on the installation head 112;

[0369] A lock 131 is fixed at the distal end of the intermediate pipe fitting 13. In the locked state, the lock 131 is inserted into the lock hole 115. The interventional instrument itself or is tied to the lock 131 through a binding wire. In the unlocked state, the lock 131 disengages from the lock hole 115 to release the interventional instrument.

[0370] The proximal end of the interventional instrument can have its own hook, snare and other structures, which can be directly wrapped around the locking element 131 through the hook and snare, and the farthest end of the locking element 131 is inserted into the locking hole 115, so the proximal position of the interventional instrument can be limited. Only when the locking element 131 is detached from the locking hole 115 can the proximal end of the interventional instrument be released.

[0371] In addition, a binding wire may be provided, a part of which is connected to the proximal end of the interventional instrument, and another part of which is wound around the locking element 131 , and may also play a restricting or releasing role through the locking element 131 .

[0372] The farthest end of the first tube 11 is the guide head 111, and the installation position of the interventional instrument is between the guide head 111 and the installation head 112. When the interventional instrument is input, the interventional instrument is radially compressed and sleeved on the first tube 11, and the distal end of the interventional instrument is placed on the guide head 111. The proximal end of the interventional instrument is connected to the installation head 112 and is further limited by the locking piece 131. The distal end of the second tube 12 has an enlarged loading section to wrap the interventional instrument. When released, the second tube 12 retreats (slides toward the proximal side), and the interventional instrument is gradually exposed and radially expands. However, since the proximal end of the interventional instrument is locked on the installation head 112, even if the interventional instrument is completely exposed to the second tube 12, its proximal end is not released. After confirming the position of the interventional instrument, the intermediate tube 13 is withdrawn so that the locking piece 131 leaves the locking hole 115. Only then can the proximal end of the interventional instrument be completely released. In this way, when the position is not good, the second tube 12 can be pushed forward to recover the interventional instrument, reload it and adjust its position.

[0373] In one embodiment, the locking member 131 is rod-shaped, a connecting seat 132 is fixed inside the intermediate tube 13, 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 cooperates with the locking hole 115 by axially moving with the intermediate tube 13.

[0374] In order to evenly distribute the locking force, in a preferred embodiment, the locking member 131 is a plurality of straight rods arranged side by side. Each straight rod extends along the axial direction of the middle pipe member 13, and the plurality of straight rods are evenly distributed along the circumference of the middle pipe member 13, for example, two to four straight rods.

[0375] The proximal end of the interventional instrument generally has a connecting ear, and a positioning slot 117 corresponding to the connecting ear can be set on the periphery of the mounting head 112 to further maintain the position of the connecting ear and prevent unnecessary axial slippage or relative rotation between the connecting ear and the mounting head 112.

[0376] When used in combination with a lashing wire, in order to facilitate the threading of the lashing wire, a wire-passing hole 116 can be provided on the mounting head 112. The penetrating direction of the wire-passing hole 116 can be along the axial or radial direction of the mounting head 112. It can be either an opening in the mounting head 112 itself or achieved by using a perforated auxiliary component. Of course, the auxiliary component is fixedly connected to the mounting head.

[0377] The distal end of the connecting ear 101 has an annular connecting portion. The lashing wire 134 passes through the annular connecting portion and the wire-passing hole 116, and a wire loop 135 is left at the end. After the locking member 131 passes through the wire loop 135 and enters the insertion lock hole 115, the wire loop 135 cannot escape from the locking member 131, that is, the connecting ear 101 is lashed to the mounting head 112.

[0378] Figure 43 As can be seen, in the unlocked state, the locking member 131 disengages from the lock hole 115, the wire loop 135 is released from the restriction. After the connecting ear 101 moves further, the lashing wire 134 can be withdrawn from the annular connecting portion to release the intervention instrument.

[0379] See Figures 44 - 46 In another embodiment, positioning protrusions 118 corresponding to the connecting ear are provided on the outer periphery of the mounting head 112 to further maintain the position of the connecting ear and prevent unnecessary axial slip or relative rotation between the connecting ear and the mounting head 112. In addition, the wire-passing hole 116 extends radially and is exactly provided on the positioning protrusion 118. There are two symmetric positioning protrusions 118, and the wire-passing hole 116 penetrates through the two positioning protrusions 118 along the axial direction of the positioning protrusion 118.

[0380] See Figures 47 - 50 In another embodiment, positioning protrusions 118 corresponding to the connecting ear are provided on the outer periphery of the mounting head 112 to further maintain the position of the connecting ear and prevent unnecessary axial slip or relative rotation between the connecting ear and the mounting head 112.

[0381] In addition, a tubular auxiliary component 119 is fixedly embedded on the outer periphery of the mounting head 112. The inside of the auxiliary component 119 is the wire-passing hole 116, and the wire-passing hole 116 extends along the axial direction of the mounting head 112.

[0382] Regarding the winding of the lashing wire, various methods can be adopted, but generally it passes through the wire-passing hole 116 at least and is in contact with the connecting ear and the locking member 131. After the locking member 131 disengages from the lock hole 115, the lashing wire releases the connecting ear, or the connecting ear and the lashing wire are released together.

[0383] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification. When the technical features in different embodiments are embodied in the same drawing, the drawing can be regarded as also disclosing the combined examples of the various embodiments involved.

[0384] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. A hydraulically driven interventional device delivery system, comprising a plurality of pipe fittings coaxially arranged from inside to outside, and a control handle for driving the relative movement of the plurality of pipe fittings. The distal ends of the pipe fittings are used to cooperate with each other to operate an interventional device, and the proximal ends of the pipe fittings are connected to the control handle, characterized in that, At the control handle, the relative movement of each pipe fitting is driven hydraulically; The control handle is provided with a plurality of hydraulic chambers, and pistons are slidably installed in each hydraulic chamber respectively. Two pipe fittings adjacent in the radial direction include an outer pipe fitting and an inner pipe fitting. The proximal end of the outer pipe fitting enters the first hydraulic chamber among the plurality of hydraulic chambers and is fixed to the first piston in the first hydraulic chamber. The inner pipe fitting extends and is connected to the pistons of other hydraulic chambers or is fixed to the control handle; An intermediate pipe fitting is also coupled between the inner pipe fitting and the outer pipe fitting. The distal end of the intermediate pipe fitting is fixedly connected to the inner pipe fitting for traction and bending adjustment, or a locking member for restricting the interventional device within the inner pipe fitting is provided at the distal end of the intermediate pipe fitting; A hydraulic drive circuit for driving the relative movement of each pipe fitting through the pistons in each hydraulic chamber is further configured at the control handle; a second hydraulic chamber communicating with the hydraulic drive circuit is arranged inside the control handle, and a second piston is arranged in the second hydraulic chamber; The proximal end of the intermediate pipe fitting passes through the first piston via the outer pipe fitting, further extends into the second hydraulic chamber, and is fixedly connected to the second piston; The hydraulic drive circuit includes: Hydraulic pipelines for providing liquid channels communicating with each hydraulic chamber; A drive pump connected to the hydraulic pipelines for driving the flow of liquid; A control valve connected to the hydraulic pipelines for controlling the liquid flow direction; The control valve includes: A multi-way switching valve having a drive-side interface connected to the outlet and inlet of the drive pump, and a plurality of working-side interfaces, wherein every two working-side interfaces are connected to one of the plurality of hydraulic chambers. The multi-way switching valve has a plurality of positions for switching the communication relationship between the drive-side interface and different working-side interfaces to control the liquid flow direction.

2. The hydraulic-driven interventional device delivery system according to claim 1, wherein The inner pipe fitting and the outer pipe fitting are slidably nested from the inside out. The distal end of the inner pipe fitting is used for placing an interventional device. When the two pipe fittings move relatively, the distal end of the outer pipe fitting wraps or releases the interventional device.

3. The hydraulic-driven interventional device delivery system according to claim 2, wherein The proximal end of the inner pipe fitting passes through the first piston via the outer pipe fitting and further extends until it is fixedly connected to the control handle.

4. The hydraulic-driven interventional device delivery system according to claim 3, wherein 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 outer pipe fitting penetrates into the first chamber and is fixedly connected to the first piston. The proximal end of the inner pipe fitting passes through the first piston via the outer pipe fitting and then extends out of the first hydraulic chamber through the second chamber.

5. The hydraulic drive intervention device delivery system according to claim 4, wherein The proximal end of the inner pipe fitting passes through the second piston via the intermediate pipe fitting and further extends until it is fixedly connected to the control handle.

6. The hydraulic-driven interventional device delivery system according to claim 5, wherein The second piston divides the second hydraulic chamber into a third chamber and a fourth chamber. Each chamber is connected to the hydraulic drive circuit through a corresponding communication port. The proximal end of the intermediate pipe fitting penetrates into the third chamber and is fixedly connected to the second piston. The proximal end of the inner pipe fitting passes through the second piston via the intermediate pipe fitting and then extends out of the second hydraulic chamber through the fourth chamber.

7. The hydraulic-driven interventional device delivery system according to any one of claims 1 to 6, characterized in that, The control handle is fixedly installed with a first cylinder, and the inside of the first cylinder is the first hydraulic chamber; The control handle is fixedly installed with a second cylinder barrel, and the interior of the second cylinder barrel is the second hydraulic chamber; The first cylinder barrel and the second cylinder barrel are coaxially arranged in sequence from the distal end to the proximal end.

8. The hydraulic-driven interventional device delivery system according to claim 7, wherein The first cylinder barrel and the second cylinder barrel are butt-jointed with each other, and a sealing isolation member is arranged at the butt-joint part, and a through hole allowing the intermediate pipe fitting to seal and slide through is formed in the sealing isolation member.

9. The hydraulic drive intervention device delivery system according to any one of claims 1 to 6, characterized in that The control handle includes a working part and a holding part connected to the working part. The outer pipe fitting extends into the first hydraulic chamber from the distal end of the working part, and the inner pipe fitting extends and is connected to the proximal end of the working part.

10. The hydraulic-driven interventional device delivery system according to claim 1, wherein, An installation head is provided on the inner pipe fitting, and a lock hole is provided on the installation head; A lock is fixed at the distal end of the intermediate pipe fitting. The lock is inserted into the lock hole in the locked state, and the intervention instrument is itself or tied to the lock by a binding wire. The lock disengages from the lock hole in the unlocked state to release the intervention instrument.

11. The hydraulic-driven interventional device delivery system according to claim 10, wherein A wire passing hole is provided on the installation head. The connecting ear of the intervention instrument is provided with an annular connecting part. The binding wire passes through the wire passing hole and the connecting part at the same time, and a wire loop for passing through the lock is reserved at the end of the binding wire.

Images