An intervention device delivery system driven by a hydraulic method

Abstract

An interventional device delivery system driven by a hydraulic method 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 (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 by a hydraulic method; the control handle (2) is provided with one or more hydraulic chambers, and pistons are respectively slidably installed in the hydraulic chambers. At the control handle (2), a hydraulic drive circuit for driving the relative movement of the pipe fittings (1) through the pistons is also configured. The hydraulic drive circuit includes: a hydraulic pipeline (33) for providing a liquid passage communicating with the hydraulic chambers; a drive pump (5) connected to the hydraulic pipeline (33) for driving the liquid to flow; and a control valve connected to the hydraulic pipeline (33) for controlling the liquid flow direction. The interventional device delivery system driven by hydraulic pressure adopts a hydraulic drive method, which is convenient and fast to use, and different functions can also be switched through the 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 adjusted mechanically. 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 relatively large, 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] An interventional device delivery system driven by a hydraulic method 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 by a hydraulic method 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. A hydraulic drive circuit for driving the relative movement of the pipe fittings through the pistons is also configured at the control handle. The hydraulic drive circuit includes:

[0006] A hydraulic pipeline for providing a liquid channel communicating with each hydraulic chamber;

[0007] A drive pump connected to the hydraulic pipeline for driving the liquid to flow;

[0008] A control valve connected to the hydraulic pipeline for controlling the liquid flow direction.

[0009] The following also provides several optional ways, but they are not additional limitations to the above overall solution, but only further supplements or optimizations. On the premise of no technical or logical contradiction, each optional way can be combined with the above overall solution alone, or multiple optional ways can be combined with each other.

[0010] Optionally, two pipe fittings adjacent to each other 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. The inner pipe fitting extends and is connected to the pistons in other hydraulic chambers or is fixed to the control handle.

[0011] Optionally, the hydraulic drive circuit further includes a liquid storage tank connected to the hydraulic pipeline for temporarily storing liquid.

[0012] Optionally, the liquid storage tank is provided with a liquid injection port.

[0013] Optionally, a liquid injection connector is installed on the control handle. The liquid injection connector is connected to the liquid injection port through the drive pump for injecting liquid into the liquid storage tank.

[0014] Optionally, the liquid in the hydraulic drive circuit is physiological saline.

[0015] Optionally, the control valve includes:

[0016] 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, where every two working-side interfaces are connected to one of the hydraulic chambers. The multi-way switching valve has a plurality of gears and is used to switch the connection relationship between the drive-side interface and different working-side interfaces to control the liquid flow direction.

[0017] Optionally, the control valve further includes:

[0018] Two one-way valves. The outlet of the drive pump is connected to one of the drive-side interfaces through the first one-way valve; the inlet of the drive pump is connected to the other drive-side interface through the second one-way valve and the liquid storage tank in sequence;

[0019] 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.

[0020] Optionally, a first cylinder is installed inside the control handle. The inside of the first cylinder is a first hydraulic chamber, and two of the working-side interfaces of the multi-way switching valve are connected to the first hydraulic chamber.

[0021] Optionally, a first piston is slidably installed in the first hydraulic chamber. The first piston divides the first hydraulic chamber into a first chamber and a second chamber, and the first chamber and the second chamber are connected to the hydraulic drive circuit through corresponding communication ports.

[0022] Optionally, the multi-way switching valve is set in one of the following forms:

[0023] (a) The multi-way switching valve has a total of four interfaces, two of which are drive-side interfaces, respectively connected to the outlet and inlet of the drive pump. The other two interfaces of the multi-way switching valve are working-side interfaces. Inside the multi-way switching valve, multiple flow channels on the valve core connect the corresponding drive-side interfaces and working-side interfaces. The multiple pipe fittings include a first pipe fitting and a second pipe fitting arranged in sequence from the inside out. Based on different connection relationships, it can be divided into gears D1 to D2, and the functions achieved by each gear are as follows:

[0024] D1: The first piston moves towards the distal end

[0025] D2: The first piston moves towards the proximal end

[0026] (b) The multi-way switching valve has a total of four interfaces, two of which are drive-side interfaces, respectively connected to the outlet and inlet of the drive pump. The other two interfaces of the multi-way switching valve are working-side interfaces. Inside the multi-way switching valve, multiple flow channels on the valve core connect the corresponding drive-side interfaces and working-side interfaces. The multiple pipe fittings include a first pipe fitting and a second pipe fitting arranged in sequence from the inside out. Based on different connection relationships, it can be divided into gears D1 to D3, and the functions achieved by each gear are as follows:

[0027] D1: The first piston moves towards the distal end

[0028] D2: The first piston moves towards the proximal end

[0029] D3: The gap between the second pipe fitting and the first pipe fitting exhausts air

[0030] (b) The multi-way switching valve has a total of five interfaces, two of which are drive-side interfaces, respectively connected to the outlet and inlet of the drive pump. The other three interfaces of the multi-way switching valve are working-side interfaces. Inside the multi-way switching valve, multiple flow channels on the valve core connect the corresponding drive-side interfaces and working-side interfaces. The multiple pipe fittings include a first pipe fitting and a second pipe fitting arranged in sequence from the inside out. A protective pipe is also sleeved outside the second pipe fitting. Based on different connection relationships, it can be divided into gears D1 to D4, and the functions achieved by each gear are as follows:

[0031] D1: The first piston moves towards the distal end

[0032] D2: The first piston moves towards the proximal end

[0033] D3: The gap between the second pipe fitting and the first pipe fitting exhausts air

[0034] D4: The gap between the protective pipe and the second pipe fitting exhausts air.

[0035] Optionally, a first cylinder and a second cylinder are installed inside the control handle. The inside of the first cylinder is the first hydraulic cavity, and the inside of the second cylinder is the second hydraulic cavity. Two of the working-side interfaces of the multi-way switching valve are connected to the first hydraulic cavity, and the other two working-side interfaces are connected to the second hydraulic cavity.

[0036] Optionally, a first piston is slidably installed in the first hydraulic chamber, and a second piston is slidably installed in the second hydraulic chamber. The first piston divides the first hydraulic chamber into a first chamber and a second chamber, and 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 corresponding communication ports.

[0037] Optionally, the multi-way switching valve is provided in one of the following forms:

[0038] (a) The multi-way switching valve has a total of six interfaces, two of which are drive-side interfaces, respectively connected to the outlet and inlet of the drive pump. The other four interfaces of the multi-way switching valve are working-side interfaces. Inside the multi-way switching valve, multiple flow channels on the valve core connect the corresponding drive-side interfaces and working-side interfaces. The multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting arranged in sequence from the inside out. Based on different connection relationships, it can be divided into D1-D4 gears, and the functions achieved by each gear are as follows:

[0039] D1: The first piston moves towards the distal end

[0040] D2: The first piston moves towards the proximal end

[0041] D3: The second piston moves towards the distal end

[0042] D4: The second piston moves towards the proximal end

[0043] (b) The multi-way switching valve has a total of six interfaces, two of which are drive-side interfaces, respectively connected to the outlet and inlet of the drive pump. The other four interfaces of the multi-way switching valve are working-side interfaces. Inside the multi-way switching valve, multiple flow channels on the valve core connect the corresponding drive-side interfaces and working-side interfaces. The multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting arranged in sequence from the inside out. Based on different connection relationships, it can be divided into D1-D6 gears, and the functions achieved by each gear are as follows:

[0044] D1: The first piston moves towards the distal end

[0045] D2: The first piston moves towards the proximal end

[0046] D3: The second piston moves towards the distal end

[0047] D4: The second piston moves towards the proximal end

[0048] D5: Exhaust the gap between the intermediate pipe fitting and the first pipe fitting

[0049] D6: Exhaust the gap between the second pipe fitting and the intermediate pipe fitting

[0050] (c) The multi-way switching valve has a total of seven interfaces, two of which are drive side interfaces, which are respectively connected to the inlet and outlet of the drive pump. The other five interfaces of the multi-way switching valve are working side interfaces. The corresponding drive side interfaces and working side interfaces are connected through multiple flow channels on the valve core inside the multi-way switching valve. The multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting, which are arranged in sequence from the inside to the outside. The second pipe fitting is also provided with a protective tube. Based on different connection relationships, it can be divided into D1 to D7 gears. The functions realized by each gear are as follows:

[0051] D1: The first piston moves to the distal end

[0052] D2: The first piston moves toward the proximal end

[0053] D3: The second piston moves to the distal end

[0054] D4: The second piston moves toward the proximal end

[0055] D5: Exhaust gas in the gap between the middle pipe and the first pipe

[0056] D6: Exhaust gas in the gap between the second pipe and the middle pipe

[0057] D7: Exhaust gas from the gap between the protective tube and the second pipe.

[0058] Optionally, the control handle is provided with one or more hydraulic chambers, each of which has a piston slidably mounted therein, and two radially adjacent pipes among the plurality of pipes correspond to one of the hydraulic chambers;

[0059] Optionally, each piston comprises:

[0060] A fixed sealing part is sleeved on the outer pipe and fixedly seals with the outer wall of the outer pipe;

[0061] A sliding sealing part is sleeved on the inner layer pipe and cooperates with the outer wall of the inner layer pipe in a sliding sealing manner;

[0062] The fixed sealing part and the sliding sealing part are fixedly connected, and at least one of them is in sliding sealing cooperation with the inner wall of the hydraulic chamber. Optionally, the radial gap between two pipes adjacent in radial direction is an exhaust gap, and a hydraulic drive circuit for driving the relative movement of each pipe through the piston is also arranged at the control handle, and the hydraulic drive circuit is also connected to the exhaust gap to implement exhaust.

[0063] Optionally, a balancing hole is provided on the piston, and a balancing valve core is installed at the position of the balancing hole; an exhaust hole connected to the exhaust gap is also provided on the piston, and the exhaust hole is located between the fixed sealing part and the sliding sealing part;

[0064] The piston divides the hydraulic chamber where it is located into two chambers. When the pressures in the two chambers approach, the balance spool valve opens to connect the two chambers and the exhaust hole.

[0065] Optionally, the multiple pipe fittings include a first pipe fitting and a second pipe fitting that are slidably nested with each other from the inside out. 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.

[0066] Optionally, the multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting that are arranged in sequence from the inside out. The distal end of the first pipe fitting is used to place the interventional device. The distal end of the intermediate pipe fitting is fixedly connected to the first pipe fitting for traction and bending adjustment, or a locking member that restricts the interventional device to the first pipe fitting is provided at the distal end of the intermediate pipe fitting. The distal end of the second pipe fitting is used to wrap or release the interventional device; the hydraulic chamber is a first hydraulic chamber and a second hydraulic chamber; the piston is a first piston slidably installed in the first hydraulic chamber and a second piston slidably installed in the second hydraulic chamber.

[0067] 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.

[0068] 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 passes through the first piston via the second pipe fitting and further extends until it is fixedly connected to the control handle.

[0069] 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.

[0070] Optionally, the hydraulic drive circuit is arranged in the control handle and is used to drive the first piston to make the pipe fittings move relative to each other.

[0071] Optionally, the first hydraulic chamber is directly opened inside the control handle, or the control handle is fixedly installed with a first cylinder, and the inside of the first cylinder is the first hydraulic chamber.

[0072] Optionally, the control handle surrounds the first cylinder, and a positioning member that cooperates with the first cylinder is provided on the control handle.

[0073] Optionally, the control handle includes a working portion for providing the first hydraulic chamber and a gripping 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.

[0074] Optionally, the gripping portion is connected to the proximal end of the working portion.

[0075] 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.

[0076] Optionally, the drive pump includes:

[0077] A pump housing fixed to the control handle and connected to the hydraulic drive circuit;

[0078] A working member movably installed in the pump housing for driving the flow of liquid;

[0079] A driving member movably installed on the control handle and linked with the working member.

[0080] Optionally, the driving member is an electric member, a pneumatic member or a manual member.

[0081] Optionally, the manual member is slidably or rotatably installed on the operation button of the control handle.

[0082] Optionally, the working member is a plunger, and the driving member directly presses against the plunger or is linked with the plunger through a transmission mechanism.

[0083] Optionally, the drive pump further includes a reset member, and the reset member acts between the driving member and the control handle.

[0084] Optionally, the control handle includes a working portion for providing the hydraulic chamber and a gripping portion connected to the working portion, and the operation button is installed on the gripping portion.

[0085] Optionally, the drive pump is located outside the control handle.

[0086] Optionally, the drive pump and / or the liquid storage tank are located outside the control handle.

[0087] Optionally, the first piston includes:

[0088] A fixed sealing portion sleeved on the second pipe fitting and fixedly and sealingly cooperated with the outer wall of the second pipe fitting;

[0089] A sliding sealing portion sleeved on the first pipe fitting and slidably and sealingly cooperated with the outer wall of the first pipe fitting;

[0090] The fixed sealing part and the sliding sealing part are fixedly connected, and at least one of them is in sliding sealing fit with the inner wall of the first hydraulic chamber.

[0091] Optionally, both the fixed sealing part and the sliding sealing part are in sliding sealing fit with the inner wall of the first hydraulic chamber;

[0092] The fixed sealing part and the sliding sealing part are fixed to each other through a connecting sleeve.

[0093] 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.

[0094] Optionally, an air passage 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 passage clearance is between the fixed sealing part and the sliding sealing part;

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

[0096] Through holes are respectively formed in the fixed sealing part and the sliding sealing part, 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 passage clearance.

[0097] Optionally, both the fixed sealing part and the sliding sealing part 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 respectively provided with through holes for the first pipe fitting or the second pipe fitting to pass through, and are in sealing fit at the passing parts, and the outer periphery of each sealing sleeve is in sliding sealing fit with the inner wall of the first hydraulic chamber.

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

[0101] Optionally, an intermediate pipe fitting is also coupled between the first pipe fitting and the second pipe fitting, 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;

[0102] The proximal end of the intermediate pipe fitting passes through the first piston via the second pipe fitting, further extends into the second hydraulic chamber and is fixedly connected to the second piston;

[0103] The proximal end of the first pipe fitting passes through the second piston via the intermediate pipe fitting and further extends until it is fixedly connected to the control handle;

[0104] The distal end of the intermediate pipe fitting is fixedly connected to the first pipe fitting for traction and bending adjustment, or a locking member for restricting the interventional device in the first pipe fitting is provided at the distal end of the intermediate pipe fitting.

[0105] The intermediate pipe fitting can serve as a bending adjustment pipe;

[0106] The intermediate pipe fitting can also serve as a pull wire pipe;

[0107] Only one multi-way switching valve and a driving pump are needed to control different hydraulic chambers, which simplifies the system structure.

[0108] 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.

[0109] Optionally, the second hydraulic chamber is directly opened inside the control handle, or the control handle is fixedly installed with a second cylinder barrel, and the inside of the second cylinder barrel is the second hydraulic chamber.

[0110] Optionally, the control handle surrounds the second cylinder barrel, and a positioning member matching the second cylinder barrel is provided on the control handle.

[0111] Optionally, the control handle is fixedly installed with a first cylinder barrel, and the inside of the first cylinder barrel is the first hydraulic chamber;

[0112] The control handle is fixedly installed with a second cylinder barrel, and the inside of the second cylinder barrel is the second hydraulic chamber;

[0113] The first cylinder barrel and the second cylinder barrel are arranged coaxially in sequence from the distal end to the proximal end.

[0114] Optionally, the first cylinder barrel and the second cylinder barrel are butted against each other, and an isolation seal is provided at the butting part. A through hole allowing the intermediate pipe fitting to slide through in a sealed manner is opened on the isolation seal.

[0115] 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:

[0116] A hydraulic pipeline for providing a liquid passage;

[0117] A drive pump connected to the hydraulic pipeline for driving the flow of liquid;

[0118] 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;

[0119] The multi-way switching valve has a plurality of gears and is used to switch the connection relationship between the drive side interface and different working side interfaces to control the liquid flow direction.

[0120] Optionally, the first piston includes:

[0121] A fixed sealing portion sleeved on the second pipe fitting and fixedly and sealingly matched with the outer wall of the second pipe fitting;

[0122] A sliding sealing portion sleeved on the first pipe fitting and slidably and sealingly matched with the outer wall of the intermediate pipe fitting;

[0123] The second piston includes:

[0124] A fixed sealing portion sleeved on the intermediate pipe fitting and fixedly and sealingly matched with the outer wall of the intermediate pipe fitting;

[0125] A sliding sealing portion sleeved on the first pipe fitting and slidably and sealingly matched with the outer wall of the first pipe fitting;

[0126] In the same piston, the fixed sealing portion and the sliding sealing portion are fixedly connected, and at least one of them is slidably and sealingly matched with the inner wall of the hydraulic chamber where it is located.

[0127] Optionally, in the same piston, both the fixed sealing portion and the sliding sealing portion are slidably and sealingly matched with the inner wall of the hydraulic chamber where they are located; the fixed sealing portion and the sliding sealing member are fixedly connected to each other through a connecting sleeve.

[0128] 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;

[0129] 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.

[0130] Optionally, a first air passage gap 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 gap is between the fixed sealing portion and the sliding sealing portion of the first piston;

[0131] 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;

[0132] 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 gap.

[0133] 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.

[0134] Optionally, through holes for the first pipe fitting, the intermediate pipe fitting, or the first pipe fitting to pass through are respectively formed in each support frame and the sealing sleeve, and are in sealing fit at the passing positions. The outer periphery of each sealing sleeve is in sliding sealing fit with the inner wall of the hydraulic chamber where it is located.

[0135] 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. An adaptive exhaust hole matching the position of the first exhaust hole is formed in the pipe wall of the second pipe fitting.

[0136] Optionally, the proximal end of the second pipe fitting is fixed to the support frame in the fixed sealing portion of the first piston.

[0137] Optionally, a second air passage gap communicating with the second exhaust hole is left between the outer wall of the connecting sleeve in the second piston and the inner wall of the second hydraulic chamber, and the axial position of the second air passage gap is between the fixed sealing portion and the sliding sealing portion of the second piston;

[0138] 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;

[0139] Balancing holes are respectively formed in the fixed sealing portion and the sliding sealing portion of the second piston. A balancing valve core is installed at the balancing holes. When the pressures in the third chamber and the fourth chamber approach, the balancing valve core opens to connect the third chamber, the fourth chamber, and the second air passage gap.

[0140] 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.

[0141] Optionally, the proximal end of the intermediate tube is fixed to a support frame in the fixed sealing portion of the second piston.

[0142] 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.

[0143] Optionally, the support frame includes:

[0144] an annular portion connected to the axial end of the connecting sleeve;

[0145] A support disk is fixed to the outer periphery of the annular portion, and the sealing sleeve is wrapped around the support disk.

[0146] Optionally, the support plate is a circular plate with a frame structure.

[0147] Optionally, the balancing valve core includes:

[0148] 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;

[0149] 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 pressure on both sides of the piston.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] Optionally, the proximal end of the fixed sleeve is slidably sealed with the outer wall of the second pipe, the radial gap between the protective tube and the second pipe is a third exhaust gap, and the side wall of the fixed sleeve is provided with a third exhaust hole connected to the third exhaust gap.

[0154] Optionally, the third exhaust hole is connected to the hydraulic drive circuit.

[0155] Optionally, the hydraulic drive circuit includes:

[0156] A hydraulic pipeline for providing a liquid passage;

[0157] A drive pump connected to the hydraulic pipeline to drive the flow of liquid;

[0158] 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;

[0159] The multi-way switching valve has a plurality of gears and is used to switch the connection relationship between the drive-side interface and different working-side interfaces to control the liquid flow direction.

[0160] 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 locking member is fixed at the distal end of the intermediate pipe fitting, the locking member is inserted into the lock hole in the locked state, the interventional device itself or is tied to the locking member through a traction cable, and the locking member disengages from the lock hole in the unlocked state to release the interventional device.

[0161] Optionally, the locking member is rod-shaped, a connection seat is fixed inside the intermediate pipe fitting, the proximal end of the locking member is inserted and fixed in the connection seat, and the distal end of the locking member cooperates with the lock hole through the axial movement of the intermediate pipe fitting.

[0162] Optionally, the locking member is a plurality of straight rods arranged side by side.

[0163] The interventional device delivery system driven by hydraulic pressure in this 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

[0164] Figure 1 It is a schematic structural diagram of an embodiment of the interventional device delivery system of this application;

[0165] Figure 2a It is a schematic structural diagram of the distal part of the interventional device delivery system of this application;

[0166] Figure 2b It is a schematic structural diagram of the interventional device adopted in an embodiment of this application;

[0167] Figure 2c It is a schematic structural diagram of the interventional device adopted in another embodiment of this application;

[0168] Figure 2d It is a schematic structural diagram of the interventional device in the loaded state;

[0169] Figure 2e Structural schematic diagram of the semi - released state of the interventional device;

[0170] Figure 2f Structural schematic diagram of the released state of the interventional device;

[0171] Figure 3 Structural schematic diagram of the proximal part of the interventional device delivery system of the present application;

[0172] Figure 4 is Figure 3 Internal structural schematic diagram of the interventional device delivery system (part of the outer shell is hidden);

[0173] Figure 5 Internal structural schematic diagram of another embodiment of the interventional device delivery system of the present application;

[0174] Figure 6 is Figure 5 Structural schematic diagram of the interventional device delivery system after moving two cylinders;

[0175] Figure 7 is Figure 5 Structural schematic diagram of the distal part of the interventional device delivery system;

[0176] Figure 8 is Figure 5 Internal structural schematic diagram of the interventional device delivery system after omitting two cylinders;

[0177] Figure 9 is Figure 8 Schematic diagram of the position change of two pistons in the interventional device delivery system;

[0178] Figure 10 Structural schematic diagram of two cylinders in an embodiment of the interventional device delivery system of the present application;

[0179] Figure 11 is Figure 10 Schematic diagram of another angle of the two cylinders;

[0180] Figure 12 is Figure 10 Exploded view of the two cylinders (with a component fixing sleeve added);

[0181] Figure 13 is Figure 10 Side view of the two cylinders;

[0182] Figure 14 is Figure 13 A - A sectional view;

[0183] Figure 15 Structural schematic diagram of the liquid storage tank in an embodiment of the interventional device delivery system of the present application;

[0184] Figure 16 It is a schematic structural diagram of the drive pump part in an embodiment of the intervention device delivery system of the present application;

[0185] Figure 17 It is Figure 16 a schematic structural diagram of the pump housing of the drive pump in

[0186] Figure 18 It is Figure 16 a schematic structural diagram of the working part of the drive pump in

[0187] Figure 19 It is a schematic structural diagram of the multi-way switching valve in an embodiment of the intervention device delivery system of the present application;

[0188] Figure 20 It is Figure 19 an exploded view of the multi-way switching valve in

[0189] Figure 21 It is Figure 19 a schematic diagram of the multi-way switching valve installed on the control handle in

[0190] Figure 22 It is Figure 19 a schematic structural diagram of the valve core of the multi-way switching valve in

[0191] Figure 23 It is Figure 22 a schematic structural diagram of the valve core from another angle in

[0192] Figure 24 It is Figure 19 a schematic structural diagram of the multi-way switching valve from another angle in

[0193] Figure 25 It is a schematic structural diagram of the fixing sleeve in an embodiment of the intervention device delivery system of the present application;

[0194] Figure 26 It is Figure 25 a schematic diagram of the fixing sleeve from another angle in

[0195] Figure 27 It is a sectional view of the fixing sleeve part in an embodiment of the intervention device delivery system of the present application;

[0196] Figure 28 It is a sectional view of the first piston part in an embodiment of the intervention device delivery system of the present application;

[0197] Figure 29 It is a sectional view of the second piston part in an embodiment of the intervention device delivery system of the present application;

[0198] Figure 30 It is a partial schematic diagram of the two piston parts in an embodiment of the intervention device delivery system of the present application;

[0199] Figure 31 Schematic diagram of the structure of the first piston in an embodiment of the intervention device delivery system of the present application;

[0200] Figure 32 is Figure 31 Another perspective structural diagram of the first piston in

[0201] Figure 33 is Figure 31 Exploded view of the first piston in

[0202] Figure 34 is Figure 31 Schematic diagram of the structure of the first piston in after omitting the sealing sleeve;

[0203] Figure 35 is Figure 34 Another perspective structural diagram of the first piston in after omitting the sealing sleeve;

[0204] Figure 36 Schematic diagram of the hydraulic working principle in an embodiment of the intervention device delivery system of the present application;

[0205] Figure 37 is Figure 36 Enlarged view of part of gear D1 in

[0206] Figure 38 Schematic diagram of the hydraulic working principle in another embodiment of the intervention device delivery system of the present application;

[0207] Figure 39 Schematic diagram of the hydraulic working principle in another embodiment of the intervention device delivery system of the present application;

[0208] Figure 40 Schematic diagram of the structure of the distal part in an embodiment of the intervention device delivery system of the present application;

[0209] Figure 41 is Figure 40 Schematic diagram of the lock in the locked state in

[0210] Figure 42 is Figure 41 Schematic diagram of the lock in the unlocked state in

[0211] Figure 43 is Figure 42 Schematic diagram in after omitting the intermediate pipe fitting;

[0212] Figure 44 Schematic diagram of the structure of the distal part (lock in the locked state) in another embodiment of the intervention device delivery system of the present application;

[0213] Figure 45 isFigure 44 Schematic diagram of the locking member in the unlocked state in

[0214] Figure 46 is Figure 45 Schematic diagram after omitting the intermediate pipe fitting in

[0215] Figure 47 Schematic diagram of the structure of the distal part in another embodiment of the interventional device delivery system of the present application;

[0216] Figure 48 is Figure 47 Schematic diagram of the locking member in the locked state in

[0217] Figure 49 is Figure 48 Schematic diagram of the locking member in the unlocked state in

[0218] Figure 50 is Figure 49 Schematic diagram after omitting the intermediate pipe fitting in

[0219] Explanation of the reference numerals in the figure is as follows:

[0220] 1. Pipe fitting;

[0221] 11. First pipe fitting; 111. Guide head; 112. Mounting head; 113. Pipeline joint; 114. Fastening sleeve; 115. Lock hole; 116. Threading hole; 117. Positioning slot; 118. Positioning protrusion; 119. Auxiliary component; 12. Second pipe fitting; 121. Loading section; 122. Fastening sleeve; 13. Intermediate pipe fitting; 131. Locking member; 132. Connection seat; 133. Fastening sleeve; 134. Binding wire; 135. Wire loop; 14. Protection tube;

[0222] 2. Control handle;

[0223] 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;

[0224] 3. Cylinder barrel;

[0225] 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 one-way valve; 332. Second one-way valve; 34. Isolation seal; 35. Distal end seal plug; 36. Proximal end seal plug;

[0226] 4. First piston;

[0227] 41. Fixed sealing part; 42. Sliding sealing 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 valve core; 481. Linking rod; 482. Sealing head; 49. Through hole;

[0228] 5. Driving pump;

[0229] 51. Pump housing; 52. Working part; 53. Driving part; 531. Shaft hole; 54. Inlet; 55. Outlet; 56. Transfer port; 57. Pump chamber;

[0230] 6. Multi-way switching valve;

[0231] 61. Valve seat; 62. Valve core; 63. Wrench; 64. Mark; 65. Interface; 66. Flow channel; 67. Driving side interface; 68. Working side interface;

[0232] 7. Liquid storage tank;

[0233] 71. Liquid injection port; 72. Liquid injection joint; 73. Inlet; 74. Outlet;

[0234] 8. Fixed sleeve;

[0235] 81. Through hole; 82. Third exhaust hole; 83. Positioning groove; 84. Storage cavity;

[0236] 9. Second piston;

[0237] 91. Fixed sealing part; 92. Sliding sealing part;

[0238] 10. Bracket;

[0239] 101. Connecting ear. Detailed implementation manners

[0240] 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 belong to the scope of protection of the present application.

[0241] 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.

[0242] It should be noted that the terms "proximal end" and "distal end" are relative to the operator. For example, in a catheter or sheath described 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 this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0243] This delivery system can be used to treat heart valves (for example, mitral valve, aortic valve, tricuspid valve and / or pulmonary valve). Such 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 vein or femoral artery; or other minimally invasive surgical methods, including but not limited to delivering the catheter through an apical approach.

[0244] 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 arranged coaxially from the inside out, and a control handle 2 for driving the relative movement of the plurality of pipe fittings 1. The distal ends of each pipe fitting are used to cooperate with each other to operate the interventional device, and the proximal ends of each pipe fitting are connected to the control handle 2, and the relative movement of each pipe fitting is driven by a hydraulic method at the control handle 2.

[0245] In the present application, the relative movement of each pipe fitting is driven by a hydraulic method at the control handle, which can realize the operation of the interventional device, such as release, cutting, rotation, grasping or recovery, etc. The entire hydraulic system is configured at the proximal end, which is more convenient for on-site debugging or assembly. Even if an unexpected situation occurs, it is also convenient to solve outside the body. If a hydraulic mechanism is configured at the distal end, more stringent requirements are imposed on the equipment volume and safety, and the forms and directions of movement that can be regulated are also limited due to equipment problems.

[0246] The plurality of pipe fittings are understood to be at least two. Specifically, sliding fit can be adopted between any two pipe fittings, that is, all parts between the two pipe fittings have an axial relative displacement during movement. Of course, if a deformable connecting piece is additionally provided between the two pipe fittings, the relative movement relationship of the connecting piece is considered separately.

[0247] It can also be two of the pipe fittings. For example, a partial fixed connection is adopted between two adjacent ones in the radial direction (for example, they are fixed to each other at the distal part). Since these two are only fixed to each other at the distal part, a small amount of relative displacement between them can still be allowed at the proximal part. Of course, this relative movement will cause one of them to deform and bend after being transmitted to the distal end. Utilizing this feature, the bending adjustment of the distal end of a certain pipe fitting can be realized.

[0248] The number of pipe fittings 1 can be two, three or more. The relative movement of different pipe fittings 1 can realize corresponding operations on the interventional instrument at the distal end (far from the operator, that is, the end close to the lesion when used in the body, and the proximal end is vice versa), such as delivery, release, attitude adjustment, recovery, etc. In terms of each pipe fitting 1 itself and the realization of the distal function, it can be implemented according to the conventional technology. Of course, improvements on the distal structure of the pipe fitting are also provided in the following text. One of the key points of this application is to adopt a liquid drive mode at the operation handle to drive the relative movement of different pipe fittings.

[0249] See Figure 2a , in one of the embodiments, the multiple pipe fittings include a first pipe fitting 11 and a second pipe fitting 12 that are slidably nested with each other from the inside to the outside in sequence. The distal end of the first pipe fitting 11 is used to place the interventional instrument. When the two pipe fittings move relative to each other, the distal end of the second pipe fitting 12 wraps or releases the interventional instrument. A protective tube fixedly connected to the control handle can also be sleeved outside the proximal end of the second pipe fitting 12 ( Figure 1 , 2a not shown in the figure).

[0250] At the outermost distal end of the first pipe fitting 11 is a guide head 111, and a mounting head 112 is also fixed near 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 usually has a groove or a convex head for cooperating with the connecting ear of the interventional instrument. During loading, the connecting ear is engaged with the groove of the mounting head 112 or hung on the convex head to limit the axial position of the interventional instrument. For more fixing methods of the connecting ear and the mounting head, reference can be made to the patent WO2019080857A1.

[0251] See Figure 2b , Figure 2c , the interventional instrument involved in this application has no strict limit on the specific shape. For example, it can include a stent 10, and a connecting ear 101 is provided at one end in the axial direction of the stent 10. The connecting ear 101 can be one with an expansion head at the end, or can also have an annular or C-shaped connecting part.

[0252] The stent 10 is a radially compressible or expandable structure, generally a net barrel-shaped structure formed by cutting or weaving.

[0253] Combined with Figures 2d - 2fThe 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.

[0254] 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.

[0255] See also Figure 3 , Figure 4 The control handle 2 is provided with a hydraulic chamber, namely a first hydraulic chamber 311, and two radially adjacent pipes are respectively a first pipe 11 and a second pipe 12 sleeved on the outside thereof. The second pipe 12 in the outer layer enters the first hydraulic chamber 311 and is fixed to the first piston 4 in the first hydraulic chamber 311, and the first pipe 11 in the inner layer extends out of the first hydraulic chamber 311 and is fixed to the control handle 2.

[0256] The shape of the control handle 2 is not strictly limited. In order to facilitate the packaging of other components, a split structure can be adopted, that is, the control handle 2 includes a first half shell 24 and a second half shell 25 that are interlocked. Of course, in order to facilitate local maintenance or operation, it can also be divided into more parts.

[0257] 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 used. In this embodiment, at least one of the first half shell 24 and the second half shell 25 is provided with a positioning column 26, and a screw hole is provided on the positioning column 26, and the other is correspondingly provided with a mounting hole for passing a bolt, and the two are fixed by bolts;

[0258] Or both are provided with positioning posts 26 and their positions match, one of the positioning posts has a positioning hole, and the other positioning post is directly inserted into the corresponding positioning hole.

[0259] In other embodiments, the first half shell 24 and the second half shell 25 may also be fixed by bonding or welding.

[0260] In different embodiments, the hydraulic chamber is directly formed inside the control handle 2, or a cylinder 3 is fixedly installed on the control handle 2, and the inside of the cylinder 3 is the hydraulic chamber. The cross-section of the cylinder 3 is not strictly limited. Preferably, its outer circumference is surrounded by a smooth curve, such as a circle or an ellipse. Taking the cross-section being a circle as an example, it can be seen in the figure that its overall shape is cylindrical.

[0261] In this embodiment, a first cylinder 31 is fixedly installed inside the control handle 2, the hydraulic chamber inside the first cylinder 31 is the first hydraulic chamber 311, and the piston inside the hydraulic chamber is the first piston 4 slidably installed in the first hydraulic chamber 311.

[0262] To protect the first cylinder 31, the first half-shell 24 and the second half-shell 25 enclose and surround the first cylinder 31. In a preferred embodiment, a positioning member 23 matching the first cylinder 31 is provided on the control handle 2. For example Figure 4 it can be seen in the figure that the positioning member 23 is one or more positioning steps, and the shape of the positioning step corresponds to the outer contour of the first cylinder 31 to clamp and fix the first cylinder 31.

[0263] Although the shape of the control handle 2 is not strictly limited, for the convenience 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 inside the working part 21, that is, the working part 21 as a whole is used to provide the first hydraulic chamber 311, and the working part 21 has opposite distal end 211 and proximal end 212.

[0264] The working part 21 and the holding part 22 adopt an integral structure or a detachable connection to facilitate storage with a smaller volume. The connection part between the working part 21 and the holding part 22 can adopt methods such as snap-fastening or threading for quick assembly.

[0265] 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, taking the movement direction of the piston in the cylinder as the axial direction of the cylinder, in this embodiment, the length direction of the holding part 22 is substantially 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, they are 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 convenient single-handed operation.

[0266] In other embodiments, the length direction of the holding part 22 can also be substantially parallel to the axial direction of the cylinder, or even aligned with each other. Then the overall shape of the control handle 2 is strip-shaped.

[0267] In a preferred embodiment, the holding portion 22 is connected to the proximal end 212 of the working portion 21. Each pipe fitting passes through the control handle 2 from the distal end 211 of the working portion 21 and further extends distally.

[0268] In order to adopt hydraulic drive for the relative movement of the pipe fittings, in an embodiment of the present application, the connection mode of the pipe fittings and the piston is further improved. The pipe fitting is directly inserted into the cylinder barrel, making the structure further compact and improving the integration degree.

[0269] See Figure 4 (In the figure, the first cylinder barrel 31 is removed to avoid component interference. 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 extends through the first piston 4 via the second pipe fitting 12 and further extends until it is fixedly connected to the control handle 2.

[0270] Relative to the working portion 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 portion 21, and the first pipe fitting 11 extends and is connected to the proximal end 212 of the working portion 21.

[0271] 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.

[0272] 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 extends out of the first hydraulic chamber 311 through the second chamber 313 after passing through the first piston 4 via the second pipe fitting 12.

[0273] Of course, as a hydraulic drive mode, sealing treatment is required at the parts where each pipe fitting enters and exits the first cylinder barrel 31. According to the movement relationship between the pipe fitting and the first cylinder barrel 31, fixed sealing or sliding sealing is correspondingly adopted.

[0274] Each communication port is arranged on the first cylinder barrel 31. The hydraulic drive circuit is for driving the first piston 4 in the first cylinder barrel 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 degree, in an embodiment, the hydraulic drive circuit is arranged in the control handle 2 to drive the first piston 4 to make each pipe fitting move relatively.

[0275] 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 portion 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 connector and be butted 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.

[0276] 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 plurality of pipe fittings include a first pipe fitting 11, an intermediate pipe fitting 13, and a second pipe fitting 12 that are slidably nested one inside the other from the inside out;

[0277] Two pipe fittings adjacent in the radial position can be regarded as two groups with different reference objects:

[0278] 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.

[0279] 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.

[0280] 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-jointed with each other. An isolation seal 34 is provided at the butt-jointed part. The proximal end of the intermediate pipe fitting 13 slidably seals through the isolation seal 34 and enters the second hydraulic chamber 321.

[0281] The plurality of pipe fittings that are slidably nested one inside the other from the inside out are three, among which:

[0282] The distal end of the first pipe fitting 11 is used to place the interventional device;

[0283] The distal end of the intermediate pipe fitting 13 is provided with a locking member that restricts the interventional device 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 locking member to change the mating relationship with the mounting head on the first pipe fitting 11;

[0284] The distal end of the second pipe fitting 12 is provided with a loading section for wrapping or releasing the interventional device.

[0285] The first pipe fitting 11 and the interventional device may be separated from each other in the body, that is, the interventional device remains in the body; they may 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.

[0286] In one embodiment, the distal end of the intermediate pipe fitting 13 may be fixedly connected to the first pipe fitting 11 for traction and bending adjustment to change the attitude 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 may 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 may also be directly fixed to the mounting head.

[0287] At the second cylinder 32, the second piston 9 divides the second hydraulic chamber 321 into a third chamber 322 and a fourth chamber 323. Each chamber is connected to the hydraulic drive circuit through a 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 chamber 321 via the fourth chamber 323.

[0288] Correspondingly, a pipeline joint is installed at the proximal end of the working part 21, and the first pipe fitting 11 extends and is connected to the pipeline joint 113.

[0289] 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 correspondingly and are not fixed.

[0290] 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.

[0291] 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.

[0292] In one embodiment of the present application, in order to further improve the integration degree, a hydraulic drive circuit for driving the relative movement of each pipe fitting through the piston is further configured at the control handle 2. Installing the hydraulic drive circuit on the control handle 2 can avoid using long external pipelines and reduce component interference during hand-held mobile operations.

[0293] In one embodiment, an interventional device delivery system driven by a hydraulic method is provided, which 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 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 by a hydraulic method;

[0294] The control handle 2 is provided with one or more hydraulic chambers, and pistons are respectively slidably installed in the hydraulic chambers. At the control handle 2, a hydraulic drive circuit for driving the relative movement of the pipe fittings 1 through the pistons is also configured. The hydraulic drive circuit includes:

[0295] A hydraulic pipeline for providing a liquid passage communicating with each hydraulic chamber;

[0296] A drive pump 5 connected to the hydraulic pipeline for driving the liquid to flow;

[0297] A control valve connected to the hydraulic pipeline for controlling the liquid flow direction.

[0298] The hydraulic pipeline generally refers to the pipeline for connecting the components in the hydraulic drive circuit. Since the hydraulic drive circuit is arranged in the control handle 2, the preferred way is that all or most of the hydraulic pipelines are 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 flexible hoses, how to accommodate them inside the control handle 2 can be implemented as needed.

[0299] The hydraulic pipeline is filled with liquid during use, and the reciprocating movement of the piston is changed by the liquid flow direction. To improve safety, the liquid in the hydraulic drive circuit is physiological saline.

[0300] By arranging corresponding control valves in the hydraulic drive circuit, the liquid flow direction can be controlled, the piston movement direction can be changed, or other auxiliary functions can be realized. For example, the control valve can 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 piston movement direction.

[0301] 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.

[0302] The liquid storage tank 7 not only has inlets and outlets connected to the hydraulic pipeline, but also can be separately configured with a liquid injection port 71. A valve can be separately configured at the liquid injection port 71 to connect to an external liquid filling device. In addition, in a preferred embodiment, a driving pump 5 can also be used to achieve liquid filling.

[0303] For example, in one embodiment, a liquid injection joint 72 is installed on the control handle 2. The liquid injection joint 72 is connected to the liquid injection port 71 through the driving pump 5 to fill the liquid storage tank 7 with liquid.

[0304] The external liquid filling device is connected to the liquid injection joint 72, and then fills the liquid storage tank 7 through the driving pump 5. In this way, the external pressurizing device can be omitted, and the hydraulic drive circuit of the intervention device delivery system itself can be fully utilized to achieve liquid filling.

[0305] In one embodiment, the control valve includes:

[0306] A multi-way switching valve 6 having a driving side interface connected to the inlets and outlets of the driving pump 5, and a plurality of working side interfaces, where every two working side interfaces are connected to one of the hydraulic chambers. The multi-way switching valve 6 has a plurality of gears and is used to switch the connection relationship between the driving side interface and different working side interfaces to control the liquid flow direction.

[0307] The multi-way switching valve 6 can switch the connection relationship between each hydraulic chamber and the inlets and outlets of the driving pump 5 through different gears, that is, the direction of piston movement can be changed. The two one-way valves can prevent unnecessary backflow of liquid at the driving pump 5 and ensure the liquid delivery efficiency.

[0308] The driving side interface and the working side interface are only distinguished according to different connecting components. For the multi-way switching valve 6 itself, they are just a plurality of different interfaces.

[0309] In one embodiment, the control valve further includes:

[0310] 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.

[0311] 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.

[0312] See Figures 10 - 14, in an embodiment of the present application, the first cylinder 31 and the second cylinder 32 are coaxially arranged and butt-jointed with each other through a partition seal 34. A distal seal 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 a hydraulic drive circuit. A proximal seal 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.

[0313] The second pipe fitting 12 is slidably sealed through the distal seal plug 35 and 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 is further slidably sealed through the partition seal 34 and 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 is fixedly sealed through the proximal seal plug 36 and connected to the control handle 2.

[0314] Combined with Figure 8 and Figure 9 , when 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. The same is true when the first piston 4 moves proximally.

[0315] 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. The same is true when the second piston 9 moves proximally.

[0316] See Figure 15 , in an 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.

[0317] See Figures 16 - 18 , in an embodiment, the drive pump 5 includes:

[0318] 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;

[0319] A working member 52 movably installed in the pump housing 51 for driving the liquid to flow;

[0320] A driving member 53 movably installed on the control handle and linked with the working member 52.

[0321] The inside of the pump housing 51 is used to form a pump chamber 57. The pump housing 51 has an inlet 54 and an outlet 55 communicating with the pump chamber 57, and the inlet 54 and the outlet 55 are connected to the hydraulic drive circuit.

[0322] When it is necessary to cooperate with the liquid injection port 71 of the liquid storage tank 7 for use, a liquid injection joint 72 is also fixed on the first half shell 24. 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 and the transfer port 56 and enters the pump chamber 57, and then sequentially passes through the outlet 55 and the liquid injection port 71 to enter the liquid storage tank 7. A liquid injection pipeline can be separately configured for liquid injection, and necessary control valves are provided to avoid interfering with the hydraulic drive circuit.

[0323] The working part 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 part 52 is a plunger, and the driving part 53 directly presses against the plunger or is linked with the plunger through a transmission mechanism.

[0324] The driving part 53 is an electric part, a pneumatic part or a manual part. The function of the driving part 53 is to drive the working part 52 to move. The driving part 53 and the working part 52 can be integrally structured or separately linked. According to the different forms of the power source, in order to simplify the structure, a manual part is preferably adopted, that is, the working part 52 is driven through manual operation. Of course, the basic functions can also be realized by using electricity or pneumatic power.

[0325] In one embodiment, the manual part is an operating button slidably or rotatably mounted on the control handle.

[0326] In one embodiment, the driving part 53 has a shaft hole 531 and is installed on the control handle through a rotating shaft. The control handle includes a working part for providing a hydraulic chamber and a holding part 22 connected to the working part. The operating button is installed on the holding part 22. So that the driving pump 5 can be operated with one hand while holding.

[0327] In one embodiment, the driving pump 5 further includes a reset part acting between the operating button and the control handle. The driving part 53 and the working part 52 can be in abutting cooperation, and can also be connected through a limiting structure or a traction part, so that the driving part 53 drives the working part 52 to reciprocate when resetting. A reset part can be provided between the driving part 53 and the control handle, such as a compression spring or a tension spring acting on the driving part 53, or a torsion spring installed at the rotating shaft part. In order to make the working part 52 reciprocate, the reset part can also directly act on the working part 52, such as a compression spring directly abutting against the working part 52 in the pump chamber 57. During use, the driving part 53 is repeatedly pressed, and then the working part 52 is driven to make the liquid flow in the hydraulic drive circuit.

[0328] 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 cavity, and a plurality of interfaces 65 are provided on the side wall of the valve cavity for connecting the drive pump and each hydraulic cavity. The valve core 62 is placed in the valve cavity and rotatably fitted. 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 the control handle 2 is provided with an identifier 64 indicating the gear position of the multi-way switching valve 6.

[0329] The valve core 62 is connected with a wrench 63. When the wrench rotates to different angles, it points to the identifiers 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. Their specific functions are further described in other embodiments below. Of course, the number of flow channels 66 can also be increased or decreased accordingly according to the functions to be achieved.

[0330] Combined with Figure 6 , Figure 7 , Figures 12 - 14 , Figures 25 - 27 , in order to establish a stable access channel, in one embodiment, 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.

[0331] The protective tube 14 is fixedly installed relative to the control handle and is located outside the second pipe fitting 12. Implementing the access through the channel established by the protective tube 14 can prevent the second pipe fitting 12 from scratching the blood vessel when reciprocating. The length of the protective tube 14, that is, the position of its distal end, can be determined according to the length of the access 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.

[0332] 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 butted 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 cavity after passing through the fixing sleeve 8 via the protective tube 14.

[0333] The fixing sleeve 8 has a through hole 81. The proximal end of the protective tube 14 extends into the through hole 81 and is hermetically and fixedly connected to 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 in that the corresponding part of the first half shell 24 is clamped into the positioning groove 83 to limit the axial position of the fixing sleeve 8.

[0334] Since the second pipe fitting 12 needs to slide back and forth, 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 sliding and sealing fit here 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 an indirect fit through other components.

[0335] In one embodiment, the first cylinder barrel is provided with a distal end seal plug 35. The proximal end of the fixed 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 fixed sleeve 8 and the outer wall of the second pipe fitting 12. That is, an indirect sliding and sealing fit is adopted. After the second pipe fitting 12 passes through the distal end seal plug 35 from the fixed sleeve 8, it enters the hydraulic cavity inside the first cylinder barrel.

[0336] Since the protection tube 14 and the second pipe fitting 12 need to slide relative to each other, a radial clearance is sometimes reserved, and air needs to be exhausted from the radial clearance during the operation.

[0337] 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 tube 14 and the second pipe fitting 12 is the third exhaust clearance, and the side wall of the fixed sleeve 8 is provided with a third exhaust hole 82 communicating with the third exhaust clearance.

[0338] The sliding and sealing fit part 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 tube 14 and the sealing point, so that air exhaust will not affect the proximal side of the sealing point, that is, it will not affect the normal operation of the hydraulic cavity.

[0339] 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 driving pump is connected to the third exhaust hole 82, and air can be exhausted by means of liquid perfusion.

[0340] See Figures 28 - 35 , pistons are respectively arranged in each hydraulic cavity. Each piston can adopt the same structure in itself. Only the positions where they are located and the pipe fittings they pass through are different, but it does not affect their structural characteristics and working principles.

[0341] Two pipe fittings adjacent in the radial direction include an outer layer pipe fitting and an inner layer pipe fitting. Each piston includes:

[0342] A fixed sealing part, sleeved on the outer layer pipe fitting and fixedly and hermetically fitted with the outer wall of the outer layer pipe fitting;

[0343] A sliding sealing part, sleeved on the inner layer pipe fitting and slidably and hermetically fitted with the outer wall of the inner layer pipe fitting;

[0344] The fixed sealing part and the sliding sealing part are fixedly connected, and at least one of them is in sliding sealing cooperation with the inner wall of the hydraulic chamber where it is located.

[0345] In one embodiment, two adjacent pipe fittings in the radial direction include an outer pipe fitting, i.e., the second pipe fitting 12, and an inner pipe fitting, i.e., the intermediate pipe fitting 13. The first piston 4 includes:

[0346] A fixed sealing part 41, sleeved on the second pipe fitting 12 and fixedly sealingly cooperating with the outer wall of the second pipe fitting 12;

[0347] A sliding sealing part 42, sleeved on the intermediate pipe fitting 13 and sliding sealingly cooperating with the outer wall of the intermediate pipe fitting 13;

[0348] The fixed sealing part 41 and the sliding sealing part 42 are fixedly connected, and the outer peripheries of both are in sliding sealing cooperation with the inner wall of the first hydraulic chamber.

[0349] The first piston 4 has a through hole extending along the axis. The proximal end of the second pipe fitting 12 is fixedly connected in the through hole through a fastening sleeve 122. On the one hand, the fastening sleeve 122 can fill the radial gap, and on the other hand, it is also convenient for 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.

[0350] 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:

[0351] A fixed sealing part 91, sleeved on the intermediate pipe fitting 13 and fixedly sealingly cooperating with the outer wall of the intermediate pipe fitting 13;

[0352] A sliding sealing part 92, sleeved on the first pipe fitting 11 and sliding sealingly cooperating with the outer wall of the first pipe fitting 11;

[0353] The fixed sealing part 91 and the sliding sealing part 92 are fixedly connected, and the outer peripheries of both are in sliding sealing cooperation with the inner wall of the second hydraulic chamber.

[0354] The second piston 9 has a through hole extending along the axis. The proximal end of the intermediate pipe fitting 13 is fixedly connected in the through hole through a fastening sleeve 133. On the one hand, the fastening sleeve 133 can fill the radial gap, and on the other hand, it is also convenient for 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.

[0355] The proximal end of the first pipe fitting 11 passes through the second hydraulic chamber and is fixedly connected to the pipeline joint 113 through a fastening sleeve 114.

[0356] The radial gap between two pipes adjacent in radial direction is the exhaust gap, and the hydraulic drive circuit is also connected with the exhaust gap to implement exhaust. The auxiliary function of hydraulic drive can be fully utilized, exhaust is exhausted by liquid infusion, and additional exhaust equipment is omitted.

[0357] In order to combine the exhaust function, the present application further improves the structure of the piston.

[0358] In one embodiment, a balancing hole is provided on the piston, and a balancing valve core is installed at the position of the balancing hole; an exhaust hole connected to the exhaust gap is also provided on the piston, and the exhaust hole is located between the fixed sealing part and the sliding sealing part; the piston divides the hydraulic cavity in which it is located into two chambers, and when the pressures in the two chambers approach, the balancing valve core opens to connect the two chambers and the exhaust hole.

[0359] 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.

[0360] 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 .

[0361] 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.

[0362] A plurality of first exhaust holes 46 may be provided along the circumference of the connecting sleeve 43 to ensure smooth passage of liquid.

[0363] 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.

[0364] 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.

[0365] In one embodiment, the support frame 44 includes:

[0366] An annular portion connected to the axial end of the connecting sleeve 43;

[0367] A support disk fixed to the outer periphery of the annular part, and the sealing sleeve 45 is wrapped around the support disk.

[0368] The annular part and the connecting sleeve 43 can be an integral structure, that is, the two axial ends of the connecting sleeve 43 serve as the annular part, and the support disk is a disk of a frame structure. To ensure strength, a plurality of reinforcing ribs 432 are further provided on the outer periphery of the connecting sleeve 43, and the reinforcing ribs 432 are connected between the support frames 44 of the fixed sealing part 41 and the sliding sealing part 42.

[0369] Each support frame 44 and the sealing 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 sealing sleeve 45 correspond. Each through hole is used for passing through pipe fittings. Depending on the position of the piston, the pipe fitting that directly cooperates with the inner edge of the through hole may be the through hole passed through by the second pipe fitting 12, the intermediate pipe fitting 13 or the first pipe fitting 11, and is sealingly fitted at the passing part. The outer periphery of each sealing sleeve 45 is slidably and sealingly fitted with the inner wall of the hydraulic chamber where it is located.

[0370] Balancing holes 47 communicating with the first air passage gap 431 are respectively provided on the fixed sealing part 41 and the sliding sealing part 42. Since the support disk is of a frame structure, the balancing holes 47 are directly provided on the sealing sleeves 45 on each side. To avoid the balancing valve core 48, a relief groove 441 for the balancing valve core 48 to penetrate is provided on the support frame 44.

[0371] 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 balancing valve core 48 to move to close the balancing hole 47 on that side, and then push the first piston 4 to move to the side with lower pressure.

[0372] When exhaust is required, liquids 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 balancing valve core 48 is exactly in the middle, that is, the balancing holes 47 on the fixed sealing part 41 and the sliding sealing part 42 are both in an open state. The liquid will enter the first air passage gap 431 through the balancing holes 47, and then enter the first exhaust gap through the first exhaust hole 46 to achieve liquid perfusion and exhaust.

[0373] In an embodiment, the balancing valve core 48 includes:

[0374] A linkage rod 481, slidably penetrating through the balancing holes 47 on the fixed sealing part 41 and the sliding sealing part 42, and having a clearance fit at the penetrating part;

[0375] Two sealing heads 482, respectively fixed to both ends of the linkage rod 481, and correspondingly closing or opening the balancing holes 47 under the action of the pressures on both sides of the piston.

[0376] In a preferred embodiment, to ensure the sealing effect, the sealing head 482 is spherical. On the opposite sides of the fixed sealing portion 41 and the sliding sealing portion 42, there are respectively recessed areas 451 located on the outer periphery of the balance hole 47. When the sealing head 482 closes the balance hole 47, it abuts against the recessed area 451.

[0377] 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 slightly different.

[0378] In one embodiment, the proximal end of the second pipe fitting 12 passes through the connecting sleeve 43 of the first piston 4 and is fixed to the support frame 44 in the sliding sealing portion 42 of the first piston 4. That is, the second pipe fitting 12 has blocked the first exhaust hole 46 on the connecting sleeve 43. At this time, an adapted exhaust hole matching the position of the first exhaust hole 46 is provided on the pipe wall of the second pipe fitting 12.

[0379] In one embodiment, the proximal end of the second pipe fitting 12 is fixed to the first piston 4 through the fastening sleeve 122. The fastening sleeve 122 is fixed to the support frame 44 in the sliding sealing 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 connecting sleeve 43. At this time, adapted exhaust holes matching the position of the first exhaust hole 46 are provided on both the second pipe fitting 12 and the fastening sleeve 122.

[0380] In one embodiment, the proximal end of the second pipe fitting 12 is fixed to the support frame 44 in the fixed sealing portion 41 of the first piston 4. That is, the second pipe fitting 12 does not block the first exhaust hole 46. At this time, the first exhaust hole 46 can be directly communicated with the first exhaust gap.

[0381] At the second piston 9, the connection relationship of the proximal end of the intermediate pipe fitting 13 and the way of providing the adapted exhaust hole are the same by analogy.

[0382] See Figures 36 - 37 , in one embodiment of the interventional device delivery system of the present application, two cylinders are adopted, namely the first cylinder 31 and the 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.

[0383] 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 tube 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.

[0384] 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.

[0385] In this embodiment, the multi-way switching valve 6 has a total of seven interfaces, two of which are drive-side interfaces 67, 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), and 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.

[0386] Specifically, the functions of each gear are as follows:

[0387]

[0388] 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.

[0389] See Figure 38 , in another embodiment, only the first cylinder 31 is used. 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.

[0390] The axially relatively moving pipe fittings include a second pipe fitting fixedly connected to the first piston 4 and a first pipe fitting fixedly connected to the control handle.

[0391] 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.

[0392] In this embodiment, the multi-way switching valve 6 has a total of four interfaces, two of which 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), and 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.

[0393] Specifically, the functions of each gear are as follows:

[0394]

[0395] 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 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.

[0396] See 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.

[0397] 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.

[0398] A protective pipe 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.

[0399] 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 arranged in the hydraulic drive circuit. 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.

[0400] 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.

[0401] Specifically, the functions of each gear are as follows:

[0402]

[0403] 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 and all balance holes are opened, enabling the liquid to be poured into the exhaust gap between the second pipe fitting and the first pipe fitting.

[0404] See 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, the first pipe fitting 11 is provided with a mounting head 112 for connecting the interventional instrument, and the mounting head 112 is provided with a locking hole 115;

[0405] A locking piece 131 is fixed to the distal end of the intermediate tube 13. The locking piece 131 is inserted into the locking hole 115 in a locked state. The interventional instrument itself is tied to the locking piece 131 by a binding wire. The locking piece 131 is detached from the locking hole 115 in an unlocked state to release the interventional instrument.

[0406] 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.

[0407] 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 .

[0408] 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.

[0409] 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.

[0410] 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.

[0411] 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.

[0412] When used in combination with a lashing wire, in order to facilitate the threading of the lashing wire, a wire threading hole 116 can be provided on the mounting head 112. The penetration direction of the wire threading hole 116 can be along the axial or radial direction of the mounting head 112. It can either be an opening in the mounting head 112 itself or be achieved by using an auxiliary component with a hole. Of course, the auxiliary component is fixedly connected to the mounting head.

[0413] The distal end of the connecting ear 101 is provided with an annular connecting portion. The lashing wire 134 passes through the annular connecting portion and the wire threading 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.

[0414] 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.

[0415] 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 threading hole 116 extends radially and is exactly provided on the positioning protrusion 118. There are two symmetric positioning protrusions 118, and the wire threading hole 116 penetrates through the two positioning protrusions 118 along the axial direction of the positioning protrusion 118.

[0416] 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.

[0417] 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 threading hole 116, and the wire threading hole 116 extends along the axial direction of the mounting head 112.

[0418] Regarding the winding of the lashing wire, various methods can be adopted, but generally it passes through the wire threading 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.

[0419] 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 as within the scope described in this specification. When the technical features in different embodiments are shown in the same drawing, it can be regarded that the drawing also discloses the combination examples of the various embodiments involved at the same time.

[0420] The above-described embodiments only express several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to 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 deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. An interventional device delivery system driven hydraulically, 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 the 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 respectively slidably installed in each hydraulic chamber. At the control handle, a hydraulic drive circuit is also configured for driving the relative movement of each pipe fitting through the pistons. The hydraulic drive circuit includes: A hydraulic pipeline for providing a liquid passage communicating with each hydraulic chamber; A drive pump connected to the hydraulic pipeline for driving the liquid to flow; A control valve connected to the hydraulic pipeline 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 hydraulic chambers. The multi-way switching valve has a plurality of gears for switching the communication relationship between the drive-side interface and different working-side interfaces to control the liquid flow direction; A first cylinder and a second cylinder are installed inside the control handle. The inside of the first cylinder is a first hydraulic chamber, and the inside of the second cylinder is a second hydraulic chamber. Two of the working-side interfaces of the multi-way switching valve are connected to the first hydraulic chamber, and the other two working-side interfaces are connected to the second hydraulic chamber. A first piston is slidably installed in the first hydraulic chamber, and a second piston is slidably installed in the second hydraulic chamber. The first piston divides the first hydraulic chamber into a first chamber and a second chamber, and 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.

2. The interventional device delivery system driven by a hydraulic method according to claim 1, wherein 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 piston of another hydraulic chamber or is fixed to the control handle.

3. The interventional device delivery system driven by a hydraulic method according to claim 1, wherein The hydraulic drive circuit further includes a liquid storage tank connected to the hydraulic pipeline for temporarily storing liquid.

4. The interventional device delivery system driven by a hydraulic method according to claim 3, wherein The liquid storage tank is provided with a liquid injection port.

5. The interventional device delivery system driven by a hydraulic method according to claim 4, characterized in that, A liquid injection joint is installed on the control handle, and the liquid injection joint is connected to the liquid injection port through the drive pump for injecting liquid into the liquid storage tank.

6. The interventional device delivery system driven by a hydraulic method according to claim 1, wherein The liquid in the hydraulic drive circuit is physiological saline.

7. The interventional device delivery system driven by a hydraulic manner according to claim 1, wherein The control valve further includes: Two one-way valves. The outlet of the drive pump is connected to one of the drive-side interfaces through the first one-way valve; the inlet of the drive pump is connected to the other drive-side interface through the second one-way valve and the liquid storage tank in sequence; 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.

8. The interventional device delivery system driven by a hydraulic method according to claim 1, wherein The multi-way switching valve is provided in one of the following forms: (a) The multi-way switching valve has a total of six interfaces, two of which are drive-side interfaces respectively connected to the outlet and inlet of the drive pump. The other four interfaces of the multi-way switching valve are working-side interfaces. Inside the multi-way switching valve, corresponding drive-side interfaces and working-side interfaces are connected through multiple flow channels on the valve core. Multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting arranged in sequence from the inside to the outside. Based on different communication relationships, it can be divided into gears D1 to D4. The functions achieved by each gear are as follows: D1: The first piston moves distally D2: The first piston moves proximally D3: The second piston moves distally D4: The second piston moves proximally. (b) The multi-way switching valve has a total of six interfaces, two of which are drive-side interfaces, respectively connected to the outlet and inlet of the drive pump. The other four interfaces of the multi-way switching valve are working-side interfaces. Inside the multi-way switching valve, multiple flow channels on the valve core connect the corresponding drive-side interfaces and working-side interfaces. The multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting arranged in sequence from the inside out. Based on different connection relationships, it can be divided into D1-D6 gears, and the functions achieved by each gear are as follows: D1: The first piston moves distally. D2: The first piston moves proximally. D3: The second piston moves distally. D4: The second piston moves proximally. D5: Exhaust the gap between the intermediate pipe fitting and the first pipe fitting. D6: Exhaust the gap between the second pipe fitting and the intermediate pipe fitting. (c) The multi-way switching valve has a total of seven interfaces, two of which are drive-side interfaces, respectively connected to the outlet and inlet of the drive pump. The other five interfaces of the multi-way switching valve are working-side interfaces. Inside the multi-way switching valve, multiple flow channels on the valve core connect the corresponding drive-side interfaces and working-side interfaces. The multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting arranged in sequence from the inside out. A protective pipe is also sleeved outside the second pipe fitting. Based on different connection relationships, it can be divided into D1-D7 gears, and the functions achieved by each gear are as follows: D1: The first piston moves distally. D2: The first piston moves proximally. D3: The second piston moves distally. D4: The second piston moves proximally. D5: Exhaust the gap between the intermediate pipe fitting and the first pipe fitting. D6: Exhaust the gap between the second pipe fitting and the intermediate pipe fitting. D7: Exhaust the gap between the protective pipe and the second pipe fitting.

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