Hydraulically driven interventional instrument delivery system

Abstract

The invention discloses a hydraulically-driven interventional instrument conveying system which comprises a plurality of pipe fittings and a control handle, the pipe fittings are coaxially arranged from inside to outside, the control handle drives the pipe fittings to move relatively, the far ends of the pipe fittings are used for operating interventional instruments in a matched mode, and the near ends of the pipe fittings are connected to the control handle. The pipe fittings are driven to move relatively at the control handle in a hydraulic mode; the control handle is provided with one or more hydraulic cavities, pistons are installed in the hydraulic cavities in a sliding mode respectively, and the multiple pipe fittings comprise the first pipe fitting and the second pipe fitting which are sequentially nested in a sliding mode from inside to outside. The hydraulic cavity is a first hydraulic cavity; the first piston divides the first hydraulic cavity into a first cavity and a second cavity, and all the cavities are connected into a hydraulic drive loop through corresponding communication ports. According to the hydraulic-driven interventional instrument conveying system, a hydraulic driving mode is adopted, use is convenient and fast, and different functions can be switched through a hydraulic driving loop.

Description

[0001] This application is a divisional application. The parent application information is application number PCT / CN2020 / 124963, international application date 2020.10.29, titled "Hydraulically Driven Interventional Device Delivery System", and national application number 202080071676.3. Technical Field

[0002] This application relates to the field of medical devices, and in particular to delivery systems for delivering interventional devices into the body. Background Technology

[0003] An interventional device delivery system typically includes a control handle positioned proximally on the operator's side, and several slender, nested tubing pieces that slide within and outside the system. The proximal end of each piece is the control end, connected to the control handle, while the distal end is the working end, which can be inserted into the body and, through their interaction, completes the delivery, release, or retrieval of the interventional device. The control handle usually has sliding or rotating components, which drive the relative axial movement between the tubing pieces. Currently, most control handles are mechanically controlled. With the development of interventional devices, more functional requirements have been placed on them. For example, the delivery system needs to achieve functions such as valve release, retrieval, and bend adjustment. These different functional modules are usually implemented by their own independent drive modules, making the control handle's transmission relatively complex and its overall size larger, which is not conducive to surgical operations. Summary of the Invention

[0004] This invention further improves the driving method of existing interventional device delivery systems, making them easier to operate.

[0005] A hydraulically driven interventional device delivery system includes multiple tubes coaxially arranged from the inside out, and a control handle that drives the relative movement of the multiple tubes. The distal ends of each tube are used to cooperate with each other to operate interventional devices, and the proximal ends of each tube are connected to the control handle. The relative movement of each tube is driven hydraulically at the control handle.

[0006] The control handle has one or more hydraulic chambers, each of which has a piston slidably installed. Two radially adjacent pipes include an outer pipe and an inner pipe. The outer pipe enters one of the hydraulic chambers and is fixed to the piston in that hydraulic chamber. The inner pipe extends to connect to the pistons in other hydraulic chambers or is fixed to the control handle.

[0007] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0008] Optionally, the multiple tubes include a first tube and a second tube that slide and nest sequentially from the inside out. The distal end of the first tube is used to place an interventional device. When the two tubes move relative to each other, the distal end of the second tube wraps around or releases the interventional device.

[0009] Optionally, the hydraulic chamber is a first hydraulic chamber; the piston is a first piston that is slidably installed in the first hydraulic chamber; the proximal end of the second tube enters the first hydraulic chamber and is fixedly connected to the first piston; the proximal end of the first tube extends further after passing through the first piston via the second tube until it is fixedly connected to the control handle.

[0010] 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 connecting port. The proximal end of the second pipe enters the first chamber and is fixedly connected to the first piston. The proximal end of the first pipe exits the first piston through the second pipe and then extends out of the first hydraulic chamber through the second chamber.

[0011] Optionally, an intermediate tube is coupled between the first tube and the second tube, the distal end of the intermediate tube being fixedly connected to the first tube for traction and bending, or the distal end of the intermediate tube being provided with a locking device to restrict the interventional instrument within the first tube.

[0012] Intermediate pipe fittings can be used as bend-adjusting pipes;

[0013] Intermediate pipe fittings can also be used as pull pipes;

[0014] A single multi-way switching valve and a drive pump can control different hydraulic chambers, simplifying the system structure.

[0015] Optionally, the control handle is provided with a second hydraulic chamber that communicates with the hydraulic drive circuit, and a second piston is provided in the second hydraulic chamber;

[0016] The proximal end of the intermediate tube extends through the second tube out of the first piston, further into the second hydraulic chamber, and is fixedly connected to the second piston.

[0017] The proximal end of the first tube extends through the intermediate tube past the second piston and further extends until it is fixedly connected to the control handle.

[0018] 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 connecting port. The proximal end of the intermediate tube passes through the third chamber and is fixedly connected to the second piston. The proximal end of the first tube passes through the intermediate tube, exits the second piston, and then extends out of the second hydraulic chamber through the fourth chamber.

[0019] Optionally, the control handle is fixedly mounted with a first cylinder, the interior of which is the first hydraulic chamber;

[0020] The control handle is fixedly mounted with a second cylinder, the interior of which is the second hydraulic chamber;

[0021] The first cylinder and the second cylinder are arranged coaxially from the far end to the near end.

[0022] Optionally, the control handle surrounds the second cylinder, and the control handle is provided with a positioning component that cooperates with the second cylinder.

[0023] Optionally, the first cylinder and the second cylinder are connected to each other, and an isolation seal is provided at the connection point. The isolation seal has a through hole that allows the intermediate tube to slide through in a sealed manner.

[0024] Optionally, the control handle includes a working part and a gripping part connected to the working part, a second tube extending from the distal end of the working part into the first hydraulic chamber, and a first tube extending and connected to the proximal end of the working part.

[0025] Optionally, the first fitting is provided with a mounting head, and the mounting head is provided with a locking hole;

[0026] The distal end of the intermediate tube is fixed with a locking device. When locked, the locking device is inserted into the locking hole. The interventional instrument is itself or tied to the locking device by a ligature. When released, the locking device disengages from the locking hole to release the interventional instrument.

[0027] Optionally, the mounting head is provided with a threading hole, the connecting ear of the interventional instrument has an annular connecting part, the binding wire passes through both the threading hole and the connecting part, and the end of the binding wire is reserved with a wire loop for passing through the locking element.

[0028] Optionally, each piston includes:

[0029] The fixed sealing part is sleeved on the outer pipe fitting and is fixedly and sealingly fitted with the outer wall of the outer pipe fitting;

[0030] The sliding seal is fitted onto the inner pipe fitting and slides in a sealing fit with the outer wall of the inner pipe fitting.

[0031] 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 cavity.

[0032] Optionally, the radial gap between two radially adjacent pipes is the exhaust gap. A hydraulic drive circuit for driving the relative movement of each pipe through the piston is also provided at the control handle. The hydraulic drive circuit is also connected to the exhaust gap to implement exhaust.

[0033] Optionally, the piston is provided with a balance hole, and a balance valve core is installed at the position of the balance hole; the piston is also provided with an exhaust hole communicating with the exhaust gap, and the exhaust hole is located between the fixed sealing part and the sliding sealing part;

[0034] The piston divides the hydraulic chamber into two chambers. When the pressure in the two chambers approaches the same level, the balance valve core opens to connect the two chambers and the exhaust port.

[0035] Optionally, the distal end of the catheter system is provided with a hydraulic chamber 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.

[0036] Optionally, the hydraulic drive circuit is configured on the control handle to drive the first piston to cause relative movement of the various pipe components.

[0037] Optionally, the first hydraulic chamber is directly located inside the control handle.

[0038] Optionally, the control handle surrounds the first cylinder, and the control handle is provided with a positioning component that cooperates with the first cylinder.

[0039] 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 having opposing distal and proximal ends, the second tube extending from the distal end of the working portion into the first hydraulic chamber, and the first tube extending and connecting to the proximal end of the working portion.

[0040] Optionally, the gripping part is connected to the proximal end of the working part.

[0041] Optionally, a pipe fitting is installed at the proximal end of the working part, and the first pipe extends and connects to the pipe fitting.

[0042] Optionally, a hydraulic drive circuit for driving relative movement of the various pipe components via the piston is also provided at the control handle; the hydraulic drive circuit includes:

[0043] Hydraulic lines are used to provide fluid passages connecting to various hydraulic chambers;

[0044] A drive pump is connected to the hydraulic lines to drive the flow of liquid.

[0045] A control valve, connected to the hydraulic pipeline, is used to control the flow direction of the liquid.

[0046] Optionally, the hydraulic drive circuit may further include a liquid storage tank connected to the hydraulic lines for temporary storage of liquid.

[0047] Optionally, the storage tank is provided with an injection port.

[0048] Optionally, the control handle is equipped with a liquid injection connector, which is connected to the liquid injection port through the drive pump for adding liquid into the storage tank.

[0049] Optionally, the liquid in the hydraulic drive circuit is physiological saline.

[0050] The control valve includes:

[0051] The multi-way switching valve has a drive-side interface connected to the inlet and outlet of the drive pump, and multiple working-side interfaces, wherein every two working-side interfaces are connected to one of the hydraulic chambers. The multi-way switching valve has multiple positions for switching the connection between the drive-side interface and different working-side interfaces to control the liquid flow direction.

[0052] Optionally, the control valve further includes:

[0053] Two check valves are provided. The outlet of the drive pump is connected to one of the drive-side interfaces via the first check valve. The inlet of the drive pump is connected to the other drive-side interface via the second check valve and the liquid storage tank.

[0054] The multi-way switching valve is embedded in the control handle, and the control handle is provided with an indicator indicating the position of the multi-way switching valve.

[0055] Optionally, the drive pump includes:

[0056] Pump housing fixed to the control handle and connected to the hydraulic drive circuit;

[0057] An active working component installed within the pump casing to drive the flow of liquid;

[0058] A drive component that is mounted on the control handle and linked to the working component.

[0059] Optionally, the driving component can be an electric component, a pneumatic component, or a hand-operated component.

[0060] Optionally, the handpiece is slidably or rotatably mounted on the operating button of the control handle.

[0061] Optionally, the working component is a plunger, and the driving component directly presses against the plunger or is linked with the plunger through a transmission mechanism.

[0062] Optionally, the drive pump further includes a reset element that acts between the drive element and the control handle.

[0063] Optionally, the control handle includes a working part for providing the hydraulic chamber and a gripping part connected to the working part, with the operating button mounted on the gripping part.

[0064] Optionally, the drive pump is located outside the control handle.

[0065] Optionally, the drive pump and / or reservoir are located outside the control handle.

[0066] Optionally, the first piston includes:

[0067] A fixed sealing part is sleeved on the second pipe fitting and fixedly and sealingly fitted with the outer wall of the second pipe fitting;

[0068] A sliding sealing part is sleeved on the first pipe fitting and slides and seals with the outer wall of the first pipe fitting.

[0069] The fixed sealing part and the sliding sealing part are fixedly connected, and at least one of them slides and seals with the inner wall of the first hydraulic cavity.

[0070] Optionally, both the fixed sealing part and the sliding sealing part are in sliding sealing cooperation with the inner wall of the first hydraulic chamber;

[0071] The fixed sealing part and the sliding sealing component are fixed to each other by a connecting sleeve.

[0072] Optionally, the radial gap between the second pipe fitting and the first pipe fitting is an exhaust gap, and the side wall of the connecting sleeve is provided with an exhaust hole communicating with the exhaust gap.

[0073] Optionally, an air passage gap communicating with the exhaust hole is left between the outer wall of the connecting sleeve and the inner wall of the first hydraulic chamber, and the axial position of the air passage gap is between the fixed sealing part and the sliding sealing part.

[0074] 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;

[0075] The fixed sealing part and the sliding sealing part are respectively provided with through holes, and a balance valve core is installed at the through hole. When the pressure in the first chamber and the second chamber approaches the same, the balance valve core opens to connect the first chamber, the second chamber and the air gap.

[0076] Optionally, both the fixed sealing part and the sliding sealing part include a support frame and a sealing sleeve wrapped around the support frame, and the connecting sleeve is fixed between the two support frames.

[0077] Optionally, each support frame and sealing sleeve is provided with a through hole for the first or second pipe to pass through, and a sealing fit is provided at the passing part, and the outer periphery of each sealing sleeve slides and seals with the inner wall of the first hydraulic cavity.

[0078] Optionally, the proximal end of the second pipe fitting passes through the connecting sleeve and is fixed to the support frame in the sliding seal portion, and the pipe wall of the second pipe fitting is provided with an adaptive vent hole that matches the position of the vent hole.

[0079] Optionally, the proximal end of the second tube is fixed to the support frame in the fixed sealing portion.

[0080] Optionally, a hydraulic drive circuit for driving relative movement of the various pipe components via the piston is also provided at the control handle; the hydraulic drive circuit includes:

[0081] Hydraulic lines are used to provide fluid passages;

[0082] A drive pump, connected to the hydraulic lines, is used to drive the flow of liquid;

[0083] The multi-way switching valve has a drive-side interface connected to the inlet and outlet of the drive pump, and multiple 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.

[0084] The multi-way switching valve has multiple positions and is used to switch the connection between the drive-side interface and different working-side interfaces to control the liquid flow direction.

[0085] Optionally, the first piston includes:

[0086] A fixed sealing part is sleeved on the second pipe fitting and fixedly and sealingly fitted with the outer wall of the second pipe fitting;

[0087] A sliding sealing part is sleeved on the first pipe fitting and slides and seals with the outer wall of the intermediate pipe fitting.

[0088] The second piston includes:

[0089] A fixed sealing part is sleeved on the intermediate pipe and fixedly and sealingly fitted with the outer wall of the intermediate pipe;

[0090] A sliding sealing part is sleeved on the first pipe fitting and slides and seals with the outer wall of the first pipe fitting.

[0091] In the same piston, 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.

[0092] Optionally, in the same piston, both the fixed sealing part and the sliding sealing part are in sliding sealing cooperation with the inner wall of the hydraulic chamber; the fixed sealing part and the sliding sealing part are fixed to each other by a connecting sleeve.

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

[0094] The radial gap between the intermediate tube and the first tube is the second exhaust gap, and the side wall of the connecting sleeve in the second piston is provided with a second exhaust hole that communicates with the second exhaust gap.

[0095] 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. The axial position of the first air passage gap is between the fixed sealing part and the sliding sealing part of the first piston.

[0096] The first piston divides the first hydraulic chamber into a first chamber and a second chamber, with the fixed sealing part of the first piston facing the first chamber and the sliding sealing part of the first piston facing the second chamber.

[0097] The fixed sealing part and the sliding sealing part of the first piston are respectively provided with balance holes. A balance valve core is installed at the balance hole. When the pressure in the first chamber and the second chamber are close, the balance valve core opens to connect the first chamber, the second chamber and the first air gap.

[0098] Optionally, in the same piston, both the fixed sealing part and the sliding sealing part include a support frame and a sealing sleeve wrapped around the support frame, and the connecting sleeve is fixed between the two support frames.

[0099] Optionally, each support frame and sealing sleeve is provided with a through hole for the first pipe fitting, the intermediate pipe fitting or the first pipe fitting to pass through, and a sealing fit is provided at the passing part, and the outer periphery of each sealing sleeve is slidably sealed to the inner wall of the hydraulic cavity.

[0100] Optionally, the proximal end of the second tube passes through the connecting sleeve of the first piston and is fixed to the support frame in the sliding sealing part of the first piston. The tube wall of the second tube is provided with an adaptive exhaust hole that matches the position of the first exhaust hole.

[0101] Optionally, the proximal end of the second tube is fixed to a support frame in the fixed seal of the first piston.

[0102] Optionally, a second air passage gap communicating with the second exhaust port is left between the outer wall of the connecting sleeve in the second piston and the inner wall of the second hydraulic chamber. The axial position of the second air passage gap is between the fixed sealing part and the sliding sealing part of the second piston.

[0103] The second piston divides the second hydraulic chamber into a third chamber and a fourth chamber, with the fixed sealing part of the second piston facing the third chamber and the sliding sealing part of the second piston facing the fourth chamber.

[0104] The fixed sealing part and the sliding sealing part of the second piston are respectively provided with balance holes. A balance valve core is installed at the balance hole. When the pressure in the third chamber and the fourth chamber approaches the same level, the balance valve core opens to connect the third chamber, the fourth chamber and the second air gap.

[0105] Optionally, the proximal end of the intermediate tube passes through the connecting sleeve of the second piston and is fixed to the support frame in the sliding sealing part of the second piston. The tube wall of the intermediate tube is provided with an adaptive exhaust hole that matches the position of the second exhaust hole.

[0106] Optionally, the proximal end of the intermediate tube is fixed to a support frame in the fixed sealing portion of the second piston.

[0107] Optionally, the balance hole is formed on the sealing sleeve, and the support frame is provided with a clearance groove for the balance valve core to pass through.

[0108] Optionally, the support frame includes:

[0109] An annular portion that is aligned with the axial end of the connecting sleeve;

[0110] A support plate fixed to the outer periphery of the annular portion, with the sealing sleeve encasing the support plate.

[0111] Optionally, the support disk is a circular disk with a frame structure.

[0112] Optionally, the balance valve core includes:

[0113] The linkage rod slides through the balance hole on the fixed sealing part and the sliding sealing part, and has a clearance fit at the through part;

[0114] Two sealing heads are fixed to the two ends of the linkage rod, respectively, and the balance holes are closed or opened accordingly under the pressure on both sides of the piston.

[0115] 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 balance hole on opposite sides. The sealing head abuts against the recessed area when closing the balance hole.

[0116] Optionally, a protective tube is also fitted over the outside of the second fitting, and the proximal end of the protective tube is fixed to the control handle.

[0117] Optionally, a fixing sleeve is installed on the control handle, the proximal end of the protective tube is sealed and connected to the distal end of the fixing sleeve, and the proximal end of the second tube extends through the protective tube out of the fixing sleeve and further into the first hydraulic chamber.

[0118] Optionally, the proximal end of the fixing sleeve is slidably sealed to the outer wall of the second pipe fitting, the radial gap between the protective tube and the second pipe fitting is a third venting gap, and the side wall of the fixing sleeve is provided with a third venting hole communicating with the third venting gap.

[0119] Optionally, the third vent is connected to the hydraulic drive circuit.

[0120] Optionally, the hydraulic drive circuit includes:

[0121] Hydraulic lines are used to provide fluid passages;

[0122] A drive pump is connected to the hydraulic lines to drive the flow of liquid.

[0123] The multi-way switching valve has a drive-side interface connected to the inlet and outlet of the drive pump, and multiple working-side interfaces, wherein two working-side interfaces are connected to the first hydraulic chamber, and one working-side interface is connected to the third exhaust port.

[0124] The multi-way switching valve has multiple positions and is used to switch the connection between the drive-side interface and different working-side interfaces to control the liquid flow direction.

[0125] Optionally, the first tube is provided with an installation head for connecting an interventional device, the installation head is provided with a locking hole, and a locking member is fixed at the distal end of the intermediate tube. The locking member is inserted into the locking hole in the locked state, and the interventional device is itself or tied to the locking member by a traction cable. In the unlocked state, the locking member is disengaged from the locking hole to release the interventional device.

[0126] Optionally, the locking element is rod-shaped, and a connecting seat is fixed inside the intermediate tube. The proximal end of the locking element is inserted and fixed to the connecting seat, and the distal end of the locking element cooperates with the lock hole by moving axially with the intermediate tube.

[0127] Optionally, the locking element consists of multiple straight rods arranged side by side.

[0128] The hydraulically driven interventional instrument delivery system of this application adopts a hydraulic drive method, which is convenient and quick to use, and can also switch different functions through the hydraulic drive circuit. Attached Figure Description

[0129] Figure 1 This is a schematic diagram of an embodiment of the interventional device delivery system of this application;

[0130] Figure 2a This is a schematic diagram of the distal portion of the interventional device delivery system of this application;

[0131] Figure 2b This is a schematic diagram of the interventional device used in one embodiment of this application;

[0132] Figure 2c This is a schematic diagram of the interventional device used in another embodiment of this application;

[0133] Figure 2d This is a schematic diagram of the structure in the loaded state of the interventional device;

[0134] Figure 2e This is a schematic diagram of the interventional device in its semi-released state.

[0135] Figure 2f A schematic diagram of the structure of an interventional device in its released state;

[0136] Figure 3 This is a schematic diagram of the proximal portion of the interventional device delivery system of this application;

[0137] Figure 4 for Figure 3 A schematic diagram of the internal structure of the interventional instrument delivery system (part of the outer shell is hidden);

[0138] Figure 5 This is a schematic diagram of the internal structure of another embodiment of the interventional device delivery system of this application;

[0139] Figure 6 for Figure 5 A schematic diagram of the structure of the interventional instrument delivery system after the two cylinders have been moved;

[0140] Figure 7 for Figure 5 A schematic diagram of the distal portion of the interventional device delivery system;

[0141] Figure 8 for Figure 5 A schematic diagram of the internal structure of the interventional instrument delivery system after omitting the two cylinders;

[0142] Figure 9 for Figure 8 Schematic diagram of the position changes of the two pistons in the interventional instrument delivery system;

[0143] Figure 10 This is a schematic diagram of the structure of two cylinders in one embodiment of the interventional device delivery system of this application;

[0144] Figure 11 for Figure 10 A schematic diagram of the two cylinders at another angle;

[0145] Figure 12 for Figure 10 Exploded view of the two cylinders (with additional component mounting sleeves added);

[0146] Figure 13 for Figure 10 Side view of the two cylinders in the middle;

[0147] Figure 14 for Figure 13 Sectional view of AA;

[0148] Figure 15 This is a schematic diagram of the structure of the reservoir in one embodiment of the interventional device delivery system of this application;

[0149] Figure 16 This is a schematic diagram of the drive pump section in one embodiment of the interventional device delivery system of this application;

[0150] Figure 17 for Figure 16 Schematic diagram of the pump casing structure of the medium-drive pump;

[0151] Figure 18 for Figure 16 Schematic diagram of the working components of the drive pump;

[0152] Figure 19 This is a schematic diagram of the structure of a multi-port switching valve in one embodiment of the interventional device delivery system of this application;

[0153] Figure 20 for Figure 19 Exploded view of a multi-way switching valve;

[0154] Figure 21 for Figure 19 A schematic diagram of a multi-way switching valve installed on a control handle;

[0155] Figure 22 for Figure 19 A schematic diagram of the valve core structure of a multi-way switching valve;

[0156] Figure 23 for Figure 22 Another structural diagram of the valve core from another angle;

[0157] Figure 24 for Figure 19 Another structural diagram of the multi-way switching valve;

[0158] Figure 25 This is a schematic diagram of the structure of the fixing sleeve in one embodiment of the interventional device delivery system of this application;

[0159] Figure 26 for Figure 25 A schematic diagram of the fixing sleeve from another angle;

[0160] Figure 27 This is a cross-sectional view of the fixing sleeve portion in one embodiment of the interventional device delivery system of this application;

[0161] Figure 28 This is a cross-sectional view of the first piston portion in one embodiment of the interventional device delivery system of this application;

[0162] Figure 29 This is a cross-sectional view of the second piston portion in one embodiment of the interventional device delivery system of this application;

[0163] Figure 30 This is a partial schematic diagram of the two piston sections in one embodiment of the interventional device delivery system of this application;

[0164] Figure 31 This is a schematic diagram of the structure of the first piston in one embodiment of the interventional device delivery system of this application;

[0165] Figure 32 for Figure 31 A schematic diagram of the first piston from another angle;

[0166] Figure 33 for Figure 31 Exploded view of the first piston in the middle;

[0167] Figure 34 for Figure 31 A schematic diagram of the first piston after omitting the sealing sleeve;

[0168] Figure 35 for Figure 34 A schematic diagram of the structure of the first piston at another angle after omitting the sealing sleeve;

[0169] Figure 36 This is a schematic diagram of the hydraulic working principle in one embodiment of the interventional device delivery system of this application;

[0170] Figure 37 for Figure 36 Enlarged view of section D1 in the mid-range mode;

[0171] Figure 38 This is a schematic diagram of the hydraulic working principle in another embodiment of the interventional device delivery system of this application;

[0172] Figure 39 This is a schematic diagram of the hydraulic working principle in another embodiment of the interventional device delivery system of this application;

[0173] Figure 40 This is a schematic diagram of the distal portion of an embodiment of the interventional device delivery system of this application;

[0174] Figure 41 for Figure 40 A schematic diagram of the locking mechanism in the locked state;

[0175] Figure 42 for Figure 41 A schematic diagram of the locking mechanism in the unlocked state;

[0176] Figure 43 for Figure 42 A schematic diagram omitting intermediate pipe fittings;

[0177] Figure 44 This is a schematic diagram of the distal portion (locking element in locked state) in another embodiment of the interventional device delivery system of this application;

[0178] Figure 45 for Figure 44 A schematic diagram of the locking mechanism in the unlocked state;

[0179] Figure 46 for Figure 45 A schematic diagram omitting intermediate pipe fittings;

[0180] Figure 47 This is a schematic diagram of the distal portion of the interventional device delivery system in another embodiment of this application;

[0181] Figure 48 for Figure 47 A schematic diagram of the locking mechanism in the locked state;

[0182] Figure 49 for Figure 48 A schematic diagram of the locking mechanism in the unlocked state;

[0183] Figure 50 for Figure 49 The diagram is shown with intermediate pipe fittings omitted.

[0184] The annotations in the figure are explained as follows:

[0185] 1. Pipe fittings;

[0186] 11. First fitting; 111. Guide head; 112. Mounting head; 113. Pipe connector; 114. Fastening sleeve; 115. Locking hole; 116. Wire hole; 117. Positioning slot; 118. Positioning protrusion; 119. Auxiliary component; 12. Second fitting; 121. Loading section; 122. Fastening sleeve; 13. Intermediate fitting; 131. Locking element; 132. Connecting seat; 133. Fastening sleeve; 134. Binding line; 135. Wire ring; 14. Protective tube;

[0187] 2. Control handle;

[0188] 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;

[0189] 3. Cylinder;

[0190] 31. First cylinder; 311. First hydraulic chamber; 312. First cavity; 313. Second cavity; 314. Connecting port; 315. Connecting port; 32. Second cylinder; 321. Second hydraulic chamber; 322. Third cavity; 323. Fourth cavity; 324. Connecting port; 325. Connecting port; 33. Hydraulic pipeline; 331. First check valve; 332. Second check valve; 34. Isolation seal; 35. Distal sealing plug; 36. Proximal sealing plug;

[0191] 4. First piston;

[0192] 41. Fixed sealing part; 42. Sliding sealing part; 43. Connecting sleeve; 431. First air gap; 432. Reinforcing rib; 44. Support frame; 441. Clearance groove; 45. Sealing sleeve; 451. Recessed area; 46. First exhaust port; 47. Balance hole; 48. Balance valve core; 481. Linkage rod; 482. Sealing head; 49. Through hole;

[0193] 5. Drive pump;

[0194] 51. Pump casing; 52. Working component; 53. Drive component; 531. Shaft hole; 54. Inlet; 55. Outlet; 56. Transfer port; 57. Pump chamber;

[0195] 6. Multi-port switching valve;

[0196] 61. Valve seat; 62. Valve core; 63. Wrench; 64. Marking; 65. Interface; 66. Flow channel; 67. Drive-side interface; 68. Working-side interface;

[0197] 7. Liquid storage tank;

[0198] 71. Injection port; 72. Injection connector; 73. Inlet; 74. Outlet;

[0199] 8. Fixing sleeve;

[0200] 81. Through hole; 82. Third vent hole; 83. Positioning groove; 84. Storage cavity;

[0201] 9. Second piston;

[0202] 91. Fixed sealing part; 92. Sliding sealing part;

[0203] 10. Bracket;

[0204] 101. Connecting ear. Detailed Implementation

[0205] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0206] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0207] It should be noted that the terms "proximal" and "distal" are relative to the operator. For example, in the catheters or sheaths mentioned herein, "proximal" refers to the end closer to the operator, i.e., the end that enters the body and is furthest from the lesion during use (e.g., the end of the catheter connected to the control handle), while "distal" refers to the end furthest from the operator, i.e., the end that enters the body and is closer to the lesion during use (e.g., the position at the catheter tip). Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0208] This delivery system can be used to treat heart valves (e.g., mitral, aortic, tricuspid, and / or pulmonary valves). Treatment may include, but is not limited to, valve replacement, valve repair, or other procedures affecting valve function. This system and method can be used via catheterization, such as through a vein or femoral artery; or with other minimally invasive surgical approaches, including but not limited to transapical catheter delivery.

[0209] See Figure 1 One embodiment of the interventional device delivery system of this application includes a catheter system, which includes multiple tubes 1 arranged coaxially from the inside to the outside, and a control handle 2 for driving the relative movement of the multiple tubes 1. The distal end of each tube is used to cooperate with each other to operate the interventional device, and the proximal end of each tube is connected to the control handle 2. The relative movement of each tube is driven by hydraulic means at the control handle 2.

[0210] This application uses hydraulic power to drive the various tubes at the control handle, enabling the operation of interventional instruments, such as release, cutting, rotation, grasping, or retrieval. The entire hydraulic system is configured at the proximal end, which is more convenient for on-site debugging or assembly. Even if unexpected situations occur, it is easier to resolve them externally. However, if the hydraulic mechanism is configured at the distal end, more stringent requirements are placed on the size and safety of the equipment, and the adjustable movement forms and directions are also limited due to equipment issues.

[0211] Multiple pipe fittings are understood as at least two. Specifically, any two pipe fittings can be in a sliding fit, meaning that all parts between the two pipe fittings have axial relative displacement during movement. Of course, if a deformable connector is additionally provided between the two pipe fittings, the relative movement relationship of the connector will be considered separately.

[0212] It can also be two pipe fittings, for example, two pipe fittings that are radially adjacent to each other and are locally fixed (for example, fixed to each other at the far end). Since these two are only fixed to each other at the far end, a small amount of relative displacement between them can be allowed at the near end. Of course, this relative movement will be transmitted to the far end and cause one of them to deform and bend. This feature can be used to adjust the bending at the far end of a pipe fitting.

[0213] The number of tubes 1 can be two, three, or more. The relative movement of different tubes 1 at the distal end (the end furthest from the operator, i.e., the end that enters the body closer to the lesion during use, and vice versa at the proximal end) enables corresponding operations on the interventional device, such as delivery, release, posture adjustment, and retrieval. The implementation of each tube 1 and its distal function can follow conventional techniques. However, improvements to the distal structure of the tubes are also provided below. One of the key points of this application is the use of a liquid-driven method at the operating handle to drive the relative movement of the different tubes.

[0214] See Figure 2a In one embodiment, the multiple tubes include a first tube 11 and a second tube 12 that slide and nest sequentially from the inside out. The distal end of the first tube 11 is used to place an interventional device. When the two tubes move relative to each other, the distal end of the second tube 12 wraps around or releases the interventional device. A protective tube, fixedly connected to a control handle, may also be fitted over the proximal end of the second tube 12. Figure 1 , 2a (Not shown in the drawing).

[0215] The farthest end of the first tube 11 is the guide head 111. A mounting head 112 is also fixed near the proximal end of the guide head 111. When the interventional device is loaded, it is located between the guide head 111 and the mounting head 112 and is radially compressed. Interventional devices generally have connecting ears. The outer wall of the mounting head is usually provided with a groove or protrusion for cooperating with the connecting ears of the interventional device. When loaded, the connecting ear engages with the groove of the mounting head 112 or hangs on the protrusion to restrict the axial position of the interventional device. For more information on the fixing methods of the connecting ear and the mounting head, please refer to patent WO2019080857A1.

[0216] See Figure 2b , Figure 2c The interventional device described in this application is not strictly limited in its specific shape. For example, it may include a stent 10 with a connecting ear 101 at one end of the axial direction. The connecting ear 101 may have an expansion head at the end, or it may have an annular or C-shaped connecting part.

[0217] The support 10 is a radially compressible or expandable structure, generally a mesh-like structure formed by cutting or weaving.

[0218] Combination Figures 2d to 2f The distal end of the second tube 12 is a loading section 121. In the loaded state, the interventional device is radially compressed. The loading section 121 wraps around the periphery of the interventional device to restrict its radial expansion. After the interventional device is in place, the second tube 12 is driven to slide axially backward relative to the first tube 11 via the control handle, gradually exposing the interventional device in the blood vessels to allow for radial expansion. The interventional device enters a semi-release state from the distal expansion stage. As the second tube 12 further retracts, the interventional device is fully exposed. Finally, the connecting ear of the interventional device detaches from the mounting head and enters the release state, thus completing the release of the interventional device. Throughout the entire process, the axial relative sliding of the first tube 11 and the second tube 12 is driven by the control handle 2.

[0219] The first fitting 11 and the second fitting 12 are commonly used plastic or metal tubes in the field of interventional devices, such as cutting thiopanthen tubes, metal braided tubes, or a combination of metal braided tubes and thiopanthen tubes. The first fitting 11 and / or the second fitting 12 can also be multi-layer composite tubes.

[0220] In one embodiment, the hydraulically driven interventional device delivery system includes multiple tubes 1 arranged coaxially from the inside to the outside, and a control handle 2 that drives the relative movement of the multiple tubes 1. The distal end of each tube 1 is used to cooperate with each other to operate the interventional device, and the proximal end of each tube 1 is connected to the control handle 2. The relative movement of each tube 1 is driven by hydraulic means at the control handle 2.

[0221] The control handle 2 is provided with one or more hydraulic chambers, and a piston is slidably installed in each hydraulic chamber. Two radially adjacent pipes 1 include an outer pipe and an inner pipe. The outer pipe enters one of the hydraulic chambers and is fixed to the piston in that hydraulic chamber. The inner pipe extends to connect to the piston of other hydraulic chambers or is fixed to the control handle 2.

[0222] See Figure 3 , Figure 4 The control handle 2 is provided with a hydraulic chamber, namely the first hydraulic chamber 311. Two radially adjacent pipes are the first pipe 11 and the second pipe 12 sleeved on the outside of it. The second pipe 12, which is on the outer layer, enters the first hydraulic chamber 311 and is fixed to the first piston 4 inside the first hydraulic chamber 311. The first pipe 11, which is on the inner layer, extends out of the first hydraulic chamber 311 and is fixed to the control handle 2.

[0223] The shape of the control handle 2 is not strictly limited. In order to facilitate the encapsulation of other components, a split structure can be adopted, that is, the control handle 2 includes a first half shell 24 and a second half shell 25 that are interlocked. Of course, in order to facilitate local maintenance or operation, it can also be divided into more parts.

[0224] To facilitate the mutual fixation between the first half-shell 24 and the second half-shell 25, various methods such as snap-fit ​​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 post 26, which has a screw hole. The other half is provided with a mounting hole for a bolt to pass through. The two are fixed by bolts.

[0225] Alternatively, both may have positioning posts 26 and be positioned in matching positions, with one positioning post having a positioning hole and the other positioning post directly engaging with the corresponding positioning hole.

[0226] In other embodiments, the first half-shell 24 and the second half-shell 25 may also be fixed by bonding or welding.

[0227] In different embodiments, the hydraulic chamber is directly formed inside the control handle 2, or the control handle 2 is fixedly mounted with a cylinder 3, the interior of which is the hydraulic chamber. The cross-section of the cylinder 3 is not strictly limited, but preferably its outer perimeter is surrounded by a smooth curve, such as a circle or an ellipse. Taking a circular cross-section as an example, it can be seen in the figure that its overall shape is cylindrical.

[0228] In this embodiment, a first cylinder 31 is fixed 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 that is slidably installed inside the first hydraulic chamber 311.

[0229] To protect the first cylinder 31, the first half-shell 24 and the second half-shell 25 fasten and surround the first cylinder 31. In a preferred embodiment, a positioning component 23 that mates with the first cylinder 31 is provided on the control handle 2. For example... Figure 4 As can be seen, the positioning component 23 is one or more positioning steps, the shape of which corresponds to the outer contour of the first cylinder 31, so as to clamp and fix the first cylinder 31.

[0230] Although the shape of the control handle 2 is not strictly limited, for ease of operation, in a preferred embodiment the control handle 2 includes a working part 21 and a gripping part 22 connected to the working part 21. The first cylinder 31 is located within the working part 21, that is, the working part 21 as a whole is used to provide a first hydraulic chamber 311, and the working part 21 has a distal end 211 and a proximal end 212 opposite to each other.

[0231] The working part 21 and the holding part 22 are integrated or detachably connected to each other, so as to facilitate storage with a smaller volume. The connection between the working part 21 and the holding part 22 can be made by means of snaps or threads for quick assembly.

[0232] The grip portion 22 is shaped for easy handling and operation. For example, it has a length direction. Since a cylinder is installed in the working part 21, with the direction of piston movement in the cylinder as the cylinder axis, the length direction of the grip portion 22 in this embodiment is approximately perpendicular to the cylinder axis, or slightly oblique. The working part 21 and the grip portion 22 are generally L-shaped. To further improve the grip feel and conform to the shape of the hand, the overall shape of the control handle 2 in this embodiment is similar to that of a pistol. Hydraulically driven control components, such as switches, can be provided in the grip portion 22 for easy one-handed operation.

[0233] In other embodiments, the length direction of the grip 22 can be approximately parallel to the cylinder axis, or even aligned with it. In this case, the overall shape of the control handle 2 is strip-shaped.

[0234] In a preferred embodiment, the grip 22 is connected to the proximal end 212 of the working part 21. The tubes extend from the distal end 211 of the working part 21 through the control handle 2 and further distally.

[0235] In order to use hydraulically driven relative movement of the pipes, one embodiment of this application further improves the connection method of the pipes and pistons by directly inserting the pipes into the cylinder, making the structure more compact and improving the integration.

[0236] See Figure 4(In the figure, the first cylinder 31 is removed to avoid interference between components. The hydraulic chamber and each chamber are still shown with reference to their relative positions to the piston. The same applies to other related views.) In this embodiment, the hydraulic chamber is the first hydraulic chamber 311; the piston is the first piston 4 that is slidably installed in the first hydraulic chamber 311. The proximal end of the second tube 12 enters the first hydraulic chamber 311 and is fixedly connected to the first piston 4. The proximal end of the first tube 11 extends further after passing through the second tube 12 out of the first piston 4 until it is fixedly connected to the control handle 2.

[0237] Relative to the working part 21 of the control handle 2, the second tube 12 extends from the distal end 211 of the working part 21 into the first hydraulic chamber 311, and the first tube 11 extends and connects to the proximal end 212 of the working part 21.

[0238] Since the proximal end of the first tube 11 is fixedly connected to the control handle 2, the movement of the first piston 4 can drive the second tube 12 to slide axially relative to the first tube 11, thereby achieving the corresponding function at the distal end of the two tubes.

[0239] Specifically, the first piston 4 divides the first hydraulic chamber 311 into a first chamber 312 and a second chamber 313. Each chamber is connected to the hydraulic drive circuit through a corresponding connecting port. The proximal end of the second pipe 12 enters the first chamber 312 and is fixedly connected to the first piston 4. The proximal end of the first pipe 11 passes through the second pipe 12, exits the first piston 4, and then extends out of the first hydraulic chamber 311 through the second chamber 313.

[0240] Of course, as a hydraulic drive, all pipes must be sealed at the points where they enter and exit the first cylinder 31. Depending on the movement of the pipes relative to the first cylinder 31, either a fixed seal or a sliding seal may be used.

[0241] Each connection port is located in the first cylinder 31. The hydraulic drive circuit is used to drive the first piston 4 in the first cylinder 31 to reciprocate. The hydraulic drive circuit can be equipped with necessary control devices such as pumps and valves as needed. In order to further improve the integration, in one embodiment, the hydraulic drive circuit is configured on the control handle 2 to drive the first piston 4 to make the pipes move relative to each other.

[0242] The interior of the first tube 11 can be used for threading guide wires, etc. Therefore, the proximal end of the first tube 11 is fixed to the control handle 2. In one embodiment, a pipe connector 113 is installed at the proximal end of the working part 21, and the first tube 11 extends and connects to the pipe connector 113. The pipe connector 113 can specifically be a Luer connector and connects to the first tube 11. Physiological saline can also be introduced into the first tube 11 through the pipe connector 113 as needed to perform air venting. The proximal end of the first tube 11 can be directly fixed to the pipe connector 113, or connected to the pipe connector 113 through a fastening sleeve 114. The fastening sleeve 114 can be filled between the outer wall of the first tube 11 and the inner wall of the pipe connector 113 to achieve fastening and sealing.

[0243] exist Figures 5-9 In the embodiment, the control handle 2 is provided with two hydraulic chambers, namely the first hydraulic chamber 311 and the second hydraulic chamber 321, and the multiple pipes include the first pipe 11, the middle pipe 13 and the second pipe 12 that are slidably nested from the inside out.

[0244] Two pipe fittings that are radially adjacent can be considered as two groups with different reference objects:

[0245] The first group consists of an intermediate tube 13 and a second tube 12 sleeved on the outside. The second tube 12, which is on the outer layer, enters the first hydraulic chamber 311 and is fixed to the first piston 4 inside the first hydraulic chamber 311. The intermediate tube 13, which is on the inner layer, extends out of the first hydraulic chamber 311 and connects to the second piston 9 inside the second hydraulic chamber 321.

[0246] The second group consists of a first pipe 11 and an intermediate pipe 13 fitted around it. The intermediate pipe 13, which is on the outer layer, enters the second hydraulic chamber 321 and is fixed to the second piston 9 inside the second hydraulic chamber 321. The first pipe 11, which is on the inner layer, extends out of the second hydraulic chamber 321 and is fixed to the control handle 2.

[0247] The control handle 2 is equipped with a first cylinder 31 and a second cylinder 32. The two cylinders provide a first hydraulic chamber 311 and a second hydraulic chamber 321 respectively. The first cylinder 31 and the second cylinder 32 are arranged coaxially and connected to each other. An isolation seal 34 is provided at the connection point. The proximal end of the intermediate tube 13 slides through the isolation seal 34 and enters the second hydraulic chamber 321.

[0248] There are three nested pipe fittings that slide sequentially from the inside out, among which:

[0249] The distal end of the first fitting 11 is used to place interventional instruments;

[0250] The distal end of the intermediate tube 13 is provided with a locking member to restrict the interventional instrument to the first tube 11; the intermediate tube 13 can slide axially relative to the first tube 11, which can change the engagement relationship between the locking member and the mounting head on the first tube 11.

[0251] The distal end of the second fitting 12 has a loading section for wrapping or releasing interventional instruments.

[0252] The first tube 11 and the interventional device can be separated within the body, i.e., the interventional device remains inside the body; or they can be connected, and after the operation is completed, the interventional device does not remain inside the body, but is withdrawn outside the body along with the first tube 11.

[0253] In one embodiment, the distal end of the intermediate tube 13 can be fixedly connected to the first tube 11 for traction and bending to change the posture of the interventional device for accurate positioning. The connection point between the intermediate tube 13 and the first tube 11 at the distal end can be the mounting head adjacent to the first tube 11, for example, on the proximal side of the mounting head. Of course, the distal end of the intermediate tube 13 can also be directly fixed to the mounting head.

[0254] 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 connecting port. The proximal end of the intermediate pipe 13 passes through the third chamber 322 and is fixedly connected to the second piston 9. The proximal end of the first pipe 11 passes through the intermediate pipe 13, exits the second piston 9, and then extends out of the second hydraulic chamber 321 through the fourth chamber 323.

[0255] A pipe fitting is installed at the proximal end of the corresponding working part 21, and the first pipe fitting 11 extends and connects to the pipe fitting 113.

[0256] The first chamber 312 and the second chamber 313 are divided according to the first piston 4, and the third chamber 322 and the fourth chamber 323 are divided according to the second piston 9. Since the positions of the two pistons are movable, the volume of each chamber also changes accordingly and is not fixed.

[0257] Combination Figure 8 and Figure 9 When only the first piston 4 moves to the distal end, it drives the second tube 12 to move to the distal end, while the positions of the first tube 11 and the intermediate tube 13 remain unchanged. The same applies when the first piston 4 moves to the proximal end.

[0258] When only the second piston 9 moves to the distal end, it drives the intermediate tube 13 to move to the distal end, while the positions of the first tube 11 and the second tube 12 remain unchanged. The same applies when the second piston 9 moves to the proximal end.

[0259] In one embodiment of this application, to further improve integration, a hydraulic drive circuit for driving the relative movement of each component via a piston is also provided at the control handle 2. Installing the hydraulic drive circuits on the control handle 2 avoids the use of lengthy external pipelines and reduces component interference during handheld operation.

[0260] In one embodiment, the hydraulic drive circuit includes:

[0261] Hydraulic lines are used to provide fluid passages connecting to various hydraulic chambers;

[0262] Drive pump 5, which is connected to the hydraulic pipeline to drive the flow of liquid;

[0263] Control valves are connected to hydraulic lines to control the flow of liquid.

[0264] Hydraulic lines generally refer to pipes used to connect various components in the hydraulic drive circuit. Since the hydraulic drive circuit is located inside the control handle 2, it is preferable that all or most of the hydraulic lines are housed inside the control handle 2. The hydraulic lines are omitted in the accompanying drawings of the specific structure in this application. Since the connection relationship of each component has been clearly explained, the hydraulic lines can be arranged as needed during implementation. Since hydraulic lines are generally made of flexible hoses, how to house them inside the control handle 2 can be implemented as needed.

[0265] When using hydraulic lines, they are filled with liquid. The direction of the liquid flow changes, which drives the piston to reciprocate. To improve safety, the liquid in the hydraulic drive circuit is saline solution.

[0266] By arranging corresponding control valves in the hydraulic drive circuit, the direction of fluid flow can be controlled, the direction of piston movement can be changed, or other auxiliary functions can be achieved. For example, the control valves may include check valves respectively configured at the inlet and outlet of the drive pump 5, and a multi-way switching valve 6 for switching the direction of piston movement.

[0267] In order to buffer and temporarily store liquid, in one embodiment the hydraulic drive circuit also includes a liquid storage tank 7 connected to the hydraulic pipeline for temporary liquid storage. The liquid storage tank 7 can also be integrated into the inside of the control handle 2. In order to add liquid in advance or on-site during use, the liquid storage tank 7 is provided with a liquid filling port 71.

[0268] The liquid storage tank 7 not only has inlet and outlet connected to the hydraulic pipeline, but can also be equipped with a separate 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, liquid filling can also be achieved by using a drive pump 5.

[0269] For example, in one embodiment, a liquid injection connector 72 is installed on the control handle 2. The liquid injection connector 72 is connected to the liquid injection port 71 through the drive pump 5 to add liquid into the storage tank 7.

[0270] An external liquid filling device is connected to the injection connector 72, and then the liquid is added to the storage tank 7 via the drive pump 5. This eliminates the need for external pressurization equipment and makes full use of the hydraulic drive circuit of the interventional instrument delivery system to achieve liquid filling.

[0271] In one embodiment, the control valve includes:

[0272] The multi-way switching valve 6 has a drive-side interface connected to the inlet and outlet of the drive pump 5, and multiple working-side interfaces, wherein every two working-side interfaces are connected to one of the hydraulic chambers. The multi-way switching valve 6 has multiple positions for switching the connection between the drive-side interface and different working-side interfaces to control the liquid flow direction.

[0273] The multi-way switching valve 6 can switch the connection between the hydraulic chambers and the inlet / outlet of the drive pump 5 through different positions, thereby changing the direction of piston movement. The two check valves can prevent unnecessary backflow of liquid at the drive pump 5, ensuring liquid delivery efficiency.

[0274] The drive-side interface and the working-side interface are only distinguished by different connecting components. For the multi-way switching valve 6 itself, they are just multiple different interfaces.

[0275] In one embodiment, the control valve further includes:

[0276] Two check valves are provided. The outlet of the drive pump 5 is connected to one of the drive-side interfaces via the first check valve. The inlet of the drive pump is connected to the other drive-side interface via the second check valve and the liquid storage tank 7.

[0277] To further instruct the operation, the multi-way switching valve 6 is mounted on the control handle 2, and the control handle 2 is marked with an indicator indicating the position of the multi-way switching valve 6.

[0278] See Figures 10-14 In one embodiment of this application, the first cylinder 31 and the second cylinder 32 are arranged coaxially and connected to each other through an isolation seal 34. The distal end of the first cylinder 31 is provided with a distal sealing plug 35, and the first cylinder 31 also has a connecting port 314 and a connecting port 315 for connecting to the hydraulic drive circuit. The proximal end of the second cylinder 32 is provided with a proximal sealing plug 36, and the second cylinder 32 also has a connecting port 324 and a connecting port 325 for connecting to the hydraulic drive circuit.

[0279] The second tube 12 has a sliding seal through the distal end sealing plug 35 connected to the first piston 4. The intermediate tube 13 and the first tube 11 extend the first piston 4 inside the second tube 12. The intermediate tube 13 has a further sliding seal through the isolation seal 34 connected to the second piston 9. The first tube 11 extends the second piston 9 inside the intermediate tube 13. The further fixed seal through the proximal end sealing plug 36 is connected to the control handle 2.

[0280] Combination Figure 8 and Figure 9When only the first piston 4 moves to the distal end, it drives the second tube 12 to move to the distal end, while the positions of the intermediate tube 13 and the first tube 11 remain unchanged. The same applies when the first piston 4 moves to the proximal end.

[0281] When only the second piston 9 moves to the distal end, it drives the intermediate tube 13 to move to the distal end, while the positions of the first tube 11 and the second tube 12 remain unchanged. The same applies when the second piston 9 moves to the proximal end.

[0282] See Figure 15 In one embodiment, the liquid storage tank 7 is a cylindrical structure closed at both ends. The bottom end of the liquid storage tank 7 is provided with a liquid injection port 71, and the side wall is provided with an inlet 73 and an outlet 74. The liquid storage tank 7 is connected to the hydraulic drive circuit through the inlet 73 and the outlet 74.

[0283] See Figures 16-18 In one embodiment, the drive pump 5 includes:

[0284] Pump housing 51 is 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;

[0285] The working component 52 is installed inside the pump casing 51 to drive the flow of liquid;

[0286] The drive unit 53 is mounted on the control handle and is linked to the working component 52.

[0287] The pump casing 51 is used to form a pump chamber 57. The pump casing 51 has an inlet 54 and an outlet 55 that communicate with the pump chamber 57, and the inlet 54 and outlet 55 are connected to the hydraulic drive circuit.

[0288] When used in conjunction with the injection port 71 of the storage tank 7, the first half-shell 24 is also fixed with an injection connector 72, and the corresponding pump shell 51 is equipped with a transfer port 56 that communicates with the pump chamber 57. During injection, the liquid enters the pump chamber 57 through the injection port 71 and the transfer port 56 in sequence, and then enters the storage tank 7 through the outlet 55 and the injection port 71 in sequence. For injection, a separate injection pipeline can be configured and necessary control valves can be set to avoid interfering with the hydraulic drive circuit.

[0289] The working component 52 performs linear reciprocating motion or circular motion within the pump casing 51 to drive the liquid flow. Common forms include impellers or plungers. In one embodiment, the working component 52 is a plunger, and the driving component 53 directly presses against the plunger or is linked to the plunger through a transmission mechanism.

[0290] The driving component 53 can be an electric component, a pneumatic component, or a manual component. The function of the driving component 53 is to drive the working component 52 to move. The driving component 53 and the working component 52 can be a single structure or separate linkage. Depending on the form of the power source, in order to simplify the structure, a manual component is preferred, that is, the working component 52 is driven by manual operation. Of course, the basic function can also be achieved by using electric or pneumatic power.

[0291] In one embodiment, the handpiece is an operating button that is slidably or rotatably mounted on the control handle.

[0292] In one embodiment, the drive member 53 has a shaft hole 531 and is mounted on a control handle via a rotating shaft. The control handle includes a working part for providing a hydraulic chamber and a gripping part 22 connected to the working part, with an operation button mounted on the gripping part 22. This allows for one-handed operation of the drive pump 5 while holding the handle.

[0293] In one embodiment, the drive pump 5 further includes a reset member acting between the operating button and the control handle. The drive member 53 and the working member 52 can abut against each other, and can also be connected by a limiting structure or a traction member, so that the drive member 53 simultaneously drives the working member 52 to reciprocate when it resets. A reset member can be provided between the drive member 53 and the control handle, such as a compression spring or tension spring acting on the drive member 53, or a coil spring installed on the rotating shaft. To enable the working member 52 to reciprocate, the reset member can also act directly on the working member 52, for example, a compression spring located in the pump chamber 57 directly abutting against the working member 52. During use, repeatedly pressing the drive member 53 drives the working member 52, causing the liquid to flow in the hydraulic drive circuit.

[0294] See Figures 19-24 In one embodiment, the multi-port switching valve 6 includes a valve seat 61 and a valve core 62 that cooperate with each other. The valve seat 61 has a valve cavity, and the side wall of the valve cavity has multiple interfaces 65 for connecting the drive pump and each hydraulic cavity. The valve core 62 is placed in the valve cavity and rotates to cooperate. The outer peripheral wall of the valve core 62 is provided with multiple flow channels 66. When the valve core 62 rotates to different positions, there is a corresponding communication relationship between the multiple flow channels 66 and the multiple interfaces 65. In order to facilitate identification, in one embodiment, the multi-port switching valve 6 is embedded in the control handle 2, and the control handle 2 is provided with an indicator 64 indicating the position of the multi-port switching valve 6.

[0295] The valve core 62 is connected to a wrench 63. Rotating the wrench to different angles points to different gear positions indicated by the markings 64. In this embodiment, to accommodate the functions of different gear positions, the flow channel 66 ( Figure 24 Seven channels are set up (as indicated by the arrows in the text), and their specific functions are further explained in other embodiments below. Of course, the channels 66 can also be increased or decreased according to the functions to be implemented.

[0296] Combination Figure 6 , Figure 7 , Figures 12-14 , Figures 25-27 In order to establish a stable intervention channel, in one embodiment, a protective tube 14 is also sleeved on the outside of the second tube 12, and the proximal end of the protective tube 14 is fixed to the control handle 2.

[0297] The protective tube 14 is fixedly installed relative to the control handle and located on the outer periphery of the second tube 12. The intervention is performed through the channel established by the protective tube 14, which can prevent the second tube 12 from scratching the blood vessels when it moves back and forth. The length of the protective tube 14, i.e. the position of its distal end, can be determined according to the length of the intervention path. The proximal end of the protective tube 14 is fixed to the distal side of the control handle 2. The proximal end of the second tube 12 passes through the protective tube 14 and then enters the first cylinder.

[0298] 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, and the proximal end of the protective tube 14 is sealed and connected to the distal end of the fixing sleeve 8. The proximal end of the second tube 12 extends further into the first hydraulic chamber after passing through the fixing sleeve 8 via the protective tube 14.

[0299] 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 sealed 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 snap-fit ​​or fasteners. In one embodiment, the outer periphery of the fixing sleeve 8 is provided with an annular positioning groove 83, and the edges of the two halves of the control handle 2 engage with the positioning groove 83. For example Figure 27 As can be seen, the corresponding part of the first half-shell 24 is engaged in the positioning groove 83 to restrict the axial position of the fixing sleeve 8.

[0300] Since the second pipe fitting 12 needs to slide back and forth, the near end of the fixed sleeve 8 slides and seals with the outer wall of the second pipe fitting 12. This sliding and sealing fit can be either a direct contact fit between the inner wall of the through hole 81 and the outer wall of the second pipe fitting 12, or an indirect fit through other components.

[0301] In one embodiment, the first cylinder has a distal sealing plug 35, and the proximal end of the fixed sleeve 8 has a receiving cavity 84 communicating with the through hole 81. A portion of the distal sealing plug 35 extends into the receiving cavity 84, and this portion seals and fills the space between the fixed sleeve 8 and the outer wall of the second tube 12. That is, an indirect sliding sealing fit is used. After the second tube 12 passes through the distal sealing plug 35 from the fixed sleeve 8, it enters the hydraulic cavity inside the first cylinder.

[0302] Since the protective tube 14 and the second fitting 12 need to slide relative to each other, a radial gap is sometimes reserved, and air needs to be vented from the radial gap during surgery.

[0303] In one embodiment, the proximal end of the fixing sleeve 8 is slidably sealed to the outer wall of the second pipe fitting 12, the radial gap between the protective tube 14 and the second pipe fitting 12 is the third exhaust gap, and the side wall of the fixing sleeve 8 is provided with a third exhaust hole 82 that communicates with the third exhaust gap.

[0304] The sliding sealing joint between the near end of the fixed sleeve 8 and the outer wall of the second pipe 12 serves as the sealing point. The axial position of the third vent hole 82 is located between the near end of the protective pipe 14 and the sealing point. This ensures that the near end of the sealing point is not affected during venting, thus preventing any impact on the normal operation of the hydraulic chamber.

[0305] To make full use of the existing hydraulic drive circuit, the third vent port 82 is connected to the hydraulic drive circuit. For example, one of the working side interfaces of a multi-way switching valve is connected to the third vent port 82; the multi-way switching valve has multiple positions, one of which connects the outlet of the drive pump to the third vent port 82, so that venting can be performed by liquid injection.

[0306] See Figures 28-35 Each hydraulic chamber is equipped with a piston. Each piston can have the same structure, differing only in its position and the pipe it passes through; this does not affect its structural characteristics or working principle. Two radially adjacent pipes include an outer pipe and an inner pipe. Each piston includes:

[0307] The fixed sealing part is sleeved on the outer pipe fitting and is fixedly and sealingly fitted with the outer wall of the outer pipe fitting;

[0308] The sliding seal is fitted onto the inner pipe fitting and slides in a sealing fit with the outer wall of the inner pipe fitting.

[0309] 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 cavity.

[0310] In one embodiment, two radially adjacent pipe fittings include an outer pipe fitting, i.e., the second pipe fitting 12, and an inner pipe fitting, i.e., the middle pipe fitting 13. The first piston 4 includes:

[0311] The fixed sealing part 41 is sleeved on the second pipe fitting 12 and is fixedly and sealingly fitted with the outer wall of the second pipe fitting 12.

[0312] The sliding sealing part 42 is sleeved on the intermediate pipe 13 and slides and seals with the outer wall of the intermediate pipe 13.

[0313] The fixed sealing part 41 and the sliding sealing part 42 are fixedly connected, and the outer periphery of both are in sliding sealing cooperation with the inner wall of the first hydraulic chamber.

[0314] The first piston 4 has a through hole extending along the axis. The proximal end of the second tube 12 is fixedly connected to the through hole by a fastening sleeve 122. The fastening sleeve 122 can fill the radial gap and also facilitate axial positioning and assembly. The first piston 4 is fixedly connected to the second tube 12, but slides with the intermediate tube 13. Therefore, when the first piston 4 moves, it can drive the second tube 12, but does not affect the position of the intermediate tube 13.

[0315] In one embodiment, two radially adjacent pipe fittings include an outer pipe fitting, i.e., an intermediate pipe fitting 13, and an inner pipe fitting, i.e., a first pipe fitting 11. The second piston 9 includes:

[0316] The fixed sealing part 91 is sleeved on the intermediate pipe 13 and is fixedly and sealed with the outer wall of the intermediate pipe 13.

[0317] The sliding sealing part 92 is sleeved on the first pipe fitting 11 and slides and seals with the outer wall of the first pipe fitting 11.

[0318] The fixed sealing part 91 and the sliding sealing part 92 are fixedly connected, and the outer periphery of both are in sliding sealing cooperation with the inner wall of the second hydraulic chamber.

[0319] The second piston 9 has a through hole extending along the axis. The proximal end of the intermediate tube 13 is fixedly connected to the through hole by a fastening sleeve 133. The fastening sleeve 133 can fill the radial gap and also facilitate axial positioning and assembly. The second piston 9 is fixedly connected to the intermediate tube 13, but slides with the first tube 11. Therefore, when the second piston 9 moves, it can drive the intermediate tube 13, but does not affect the position of the first tube 11.

[0320] The proximal end of the first pipe fitting 11 passes through the second hydraulic chamber and is fixedly connected to the pipe joint 113 by a fastening sleeve 114.

[0321] The radial clearance between two adjacent pipe fittings is the venting clearance. The hydraulic drive circuit is also connected to the venting clearance to implement venting. This fully utilizes the auxiliary function of the hydraulic drive, venting through liquid injection, and also eliminates the need for additional venting equipment.

[0322] In order to integrate the exhaust function, this application also makes further improvements to the piston structure.

[0323] In one embodiment, the piston is provided with a balance hole, and a balance valve core is installed at the position of the balance hole; the piston is also provided with an exhaust hole communicating with the exhaust gap, and the exhaust hole is located between the fixed sealing part and the sliding sealing part; the piston divides the hydraulic chamber into two chambers, and when the pressure in the two chambers approaches the same level, the balance valve core opens to connect the two chambers and the exhaust hole.

[0324] Since the two pistons have the same structure, the first piston 4 will be used as an example below, and the second piston 9 will be treated similarly. In the first piston 4, the fixed sealing part 41 and the sliding sealing part 42 are fixed to each other by a connecting sleeve 43.

[0325] Both the fixed sealing part 41 and the sliding sealing part 42 include a support frame 44 and a sealing sleeve 45 wrapped around the support frame 44, and the connecting sleeve 43 is fixed between the two support frames 44.

[0326] The radial gap between the second pipe 12 and the intermediate pipe 13 is the first exhaust gap. The side wall of the connecting sleeve 43 in the first piston 4 is provided with a first exhaust hole 46 that communicates with the first exhaust gap. A first air passage gap 431 that communicates with 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. The axial position of the first air passage gap 431 is between the fixed sealing part 41 and the sliding sealing part 42 of the first piston 4.

[0327] Multiple first vent holes 46 can be opened along the circumference of the connecting sleeve 43 to ensure smooth flow of liquid.

[0328] Similarly, the radial gap between the intermediate pipe 13 and the first pipe 11 is the second exhaust gap, and the side wall of the connecting sleeve in the second piston 9 is provided with a second exhaust hole that communicates with the second exhaust gap.

[0329] A second air passage gap is provided between the outer wall of the connecting sleeve in the second piston 9 and the inner wall of the second hydraulic chamber, which communicates with the second exhaust hole. The axial position of the second air passage gap is between the fixed sealing part 91 and the sliding sealing part 92 of the second piston 9.

[0330] In one embodiment, the support frame 44 includes:

[0331] The annular portion that mates with the axial end of the connecting sleeve 43;

[0332] A support plate is fixed to the outer periphery of the annular part, and a sealing sleeve 45 is wrapped around the support plate.

[0333] The annular portion and the connecting sleeve 43 can be an integral structure, that is, the two ends of the connecting sleeve 43 in the axial direction are the annular portion, and the support plate is a circular plate with a frame structure. In order to ensure strength, multiple reinforcing ribs 432 are provided on the outer periphery of the connecting sleeve 43. The reinforcing ribs 432 are connected between the support frame 44 of the fixed sealing portion 41 and the sliding sealing portion 42.

[0334] Each support frame 44 and sealing sleeve 45 is provided with a through hole 49. The connecting sleeve 43 in the support frame 44 is an axially through structure, and the through area is used as a through hole. The through holes 49 on the sealing sleeve 45 are positioned accordingly. Each through hole is used to pass through a pipe. Depending on the position of the piston, the through hole that directly mates with the inner edge of the through hole may be the through hole through which the second pipe 12, the intermediate pipe 13, or the first pipe 11 passes, and a sealing fit is made at the passing part. The outer periphery of each sealing sleeve 45 slides and seals with the inner wall of the hydraulic cavity.

[0335] The fixed sealing part 41 and the sliding sealing part 42 are respectively provided with balance holes 47 that communicate with the first air gap 431. Since the support plate is a frame structure, the balance holes 47 are directly opened on the sealing sleeves 45 on each side. In order to avoid the balance valve core 48, the support frame 44 is provided with a relief groove 441 for the balance valve core 48 to pass through.

[0336] When the pressure on both sides of the first piston 4 is unequal, the liquid on the high-pressure side will drive the balance valve core 48 to move and close the balance hole 47 on that side, thereby pushing the first piston 4 to move towards the low-pressure side.

[0337] When venting is required, liquid can be simultaneously introduced into the first chamber and the second chamber on both sides of the first piston 4 to make the pressure on both sides of the first piston 4 basically the same. At this time, the balance valve core 48 is exactly in the center, that is, the balance holes 47 on the fixed sealing part 41 and the sliding sealing part 42 are both in the open state. The liquid will enter the first air gap 431 through the balance hole 47, and then enter the first exhaust gap through the first exhaust hole 46 to realize liquid injection and venting.

[0338] In one embodiment, the balance valve core 48 includes:

[0339] Linkage rod 481 slides through the balance hole 47 on the fixed sealing part 41 and the sliding sealing part 42, and has a clearance fit at the through part;

[0340] Two sealing heads 482 are fixed to the two ends of the linkage rod 481 respectively, and the balance holes 47 are closed or opened accordingly under the pressure on both sides of the piston.

[0341] In a preferred embodiment, in order to ensure the sealing effect, the sealing head 482 is spherical, and the fixed sealing part 41 and the sliding sealing part 42 are respectively provided with a recessed area 451 on the outer periphery of the balance hole 47. When the balance hole 47 is closed, the sealing head 482 is attached to the recessed area 451.

[0342] Depending on the specific location of the proximal end of the second fitting 12, the way in which the liquid enters the first vent gap through the first vent hole 46 also varies slightly.

[0343] In one embodiment, the proximal end of the second tube 12 passes through the connecting sleeve 43 of the first piston 4 and is fixed to the support frame 44 in the sliding sealing part 42 of the first piston 4. That is, the second tube 12 has blocked the first exhaust hole 46 on the connecting sleeve 43. At this time, the tube wall of the second tube 12 is provided with an adaptive exhaust hole that matches the position of the first exhaust hole 46.

[0344] In one embodiment, the proximal end of the second tube 12 is fixed to the first piston 4 by a fastening sleeve 122. The fastening sleeve 122 is fixed to the support frame 44 in the sliding sealing part 42 of the first piston 4. That is, both the second tube 12 and the fastening sleeve 122 have blocked the first exhaust hole 46 on the connecting sleeve 43. At this time, both the second tube 12 and the fastening sleeve 122 are provided with an appropriate exhaust hole that matches the position of the first exhaust hole 46.

[0345] In one embodiment, the proximal end of the second tube 12 is fixed to the support frame 44 in the fixed sealing portion 41 of the first piston 4. That is, the second tube 12 does not block the first exhaust port 46, and the first exhaust port 46 can directly communicate with the first exhaust gap.

[0346] The connection relationship of the proximal end of the intermediate tube 13 at the second piston 9 and the way the exhaust port is opened are similar.

[0347] See Figures 36-37 In one embodiment of the interventional device delivery system of this application, two cylinders are used, namely a first cylinder 31 and a second cylinder 32. The first cylinder 31 is equipped with a first piston 4 with a balance valve core 48 and has a connecting port 314 and a connecting port 315. The second cylinder 32 is equipped with a second piston 9 with a balance valve core and has a connecting port 324 and a connecting port 325.

[0348] The axially relative moving pipe includes a second pipe fixedly connected to the first piston 4, an intermediate pipe fixedly connected to the second piston 9, and a first pipe fixedly connected to the control handle. In addition, a protective pipe located on the outer periphery of the second pipe is connected to the control handle via a fixing sleeve 8. The fixing sleeve 8 has a third vent hole 82.

[0349] The hydraulic drive circuit also includes a multi-way switching valve 6, a drive pump 5 with an inlet 54 and an outlet 55, and a storage tank 7 with an inlet 73 and an outlet 74. A first check valve 331 is connected to the inlet 54 of the drive pump 5; a second check valve 332 is connected to the outlet 55 of the drive pump 5. All components are connected through corresponding hydraulic lines 33.

[0350] In this embodiment, the multi-way switching valve 6 has seven ports, two of which are drive-side ports 67, which are connected to the inlet and outlet of the drive pump 5 respectively (indirectly connected through a check valve and a liquid storage tank). The other five ports of the multi-way switching valve 6 are working-side ports 68. Inside the multi-way switching valve 6, the corresponding drive-side ports 67 and working-side ports 68 can be connected through multiple flow channels 66 on the valve core. Based on different connection relationships, it can be divided into seven positions from D1 to D7, each position realizing a different function.

[0351] Specifically, the functions of each gear are as follows:

[0352]

[0353] 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, allowing liquid to be injected into the corresponding exhaust gap.

[0354] See Figure 38 In another embodiment, only a first cylinder 31 is used, and a first piston 4 with a balance valve core 48 is installed inside the first cylinder 31. The first cylinder 31 has a connecting port 314 and a connecting port 315.

[0355] The axially relative moving tubular component includes a second tubular component fixedly connected to the first piston 4, and a first tubular component fixedly connected to the control handle.

[0356] The hydraulic drive circuit also includes a multi-way switching valve 6, a drive pump 5 with an inlet 54 and an outlet 55, and a storage tank 7 with an inlet 73 and an outlet 74. A first check valve 331 is connected to the inlet 54 of the drive pump 5; a second check valve 332 is connected to the outlet 55 of the drive pump 5. All components are connected through corresponding hydraulic lines 33.

[0357] In this embodiment, the multi-way switching valve 6 has four interfaces, two of which are drive-side interfaces, which are connected to the inlet and outlet of the drive pump 5 respectively (indirectly connected through a check valve and a liquid storage tank). The other two interfaces of the multi-way switching valve 6 are working-side interfaces, which can be divided into three positions, D1 to D3, based on different connection relationships. Each position realizes a different function.

[0358] Specifically, the functions of each gear are as follows:

[0359]

[0360] 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 introduced at the same time, so that the balance valve core is centered and all balance holes are opened, so that liquid can be injected into the gap between the second pipe and the first pipe for venting.

[0361] See Figure 39 In another embodiment, only a first cylinder 31 is used, and a first piston 4 with a balance valve core 48 is installed inside the first cylinder 31. The first cylinder 31 has a connecting port 314 and a connecting port 315.

[0362] The axially relative moving tubular component includes a second tubular component fixedly connected to the first piston 4, and a first tubular component fixedly connected to the control handle.

[0363] The control handle is also connected to a protective tube on the outer periphery of the second pipe via a fixing sleeve 8. The fixing sleeve 8 has a third vent hole 82.

[0364] The hydraulic drive circuit also includes a multi-way switching valve 6, a drive pump 5 with an inlet 54 and an outlet 55, and a storage tank 7 with an inlet 73 and an outlet 74. A first check valve 331 is connected to the inlet 54 of the drive pump 5; a second check valve 332 is connected to the outlet 55 of the drive pump 5. All components are connected through corresponding hydraulic lines 33.

[0365] In this embodiment, the multi-way switching valve 6 has five ports, two of which are drive-side ports, connected to the inlet and outlet of the drive pump 5 respectively (indirectly connected through a check valve and a liquid storage tank). The other three ports of the multi-way switching valve 6 are working-side ports, which can be divided into four positions, D1 to D4, based on different connection relationships. Each position performs a different function.

[0366] Specifically, the functions of each gear are as follows:

[0367]

[0368] In gear D3, the chambers on both sides of the piston are simultaneously connected to the outlet 55 of the drive pump 5, that is, liquid is simultaneously introduced, so that the balance valve core is centered and all balance holes are opened, so that liquid can be injected into the exhaust gap between the second pipe and the first pipe.

[0369] See Figures 40-43 The control handle can drive the relative movement of each tube to realize the relevant operation of the interventional device at the remote end. In one embodiment, the first tube 11 is provided with a mounting head 112 for connecting the interventional device, and the mounting head 112 is provided with a locking hole 115.

[0370] The distal end of the intermediate tube 13 is fixed with a locking member 131. When the locking member 131 is in the locked state, it is inserted into the locking hole 115. The interventional device is itself or tied to the locking member 131 by a ligation line. When the locking member 131 is in the unlocked state, it is disengaged from the locking hole 115 to release the interventional device.

[0371] The proximal end of the interventional device can be equipped with hooks, loops, or other structures, which can be directly wrapped around the locking member 131. The farthest end of the locking member 131 is inserted into the locking hole 115, thus restricting the position of the proximal end of the interventional device. Only when the locking member 131 is disengaged from the locking hole 115 can the proximal end of the interventional device be released.

[0372] Alternatively, a ligating line can be set, with one part of the ligating line being threaded and connected to the proximal end of the interventional device, and the other part being wrapped around the locking member 131. The locking member 131 can also be used to restrict or release the device.

[0373] The farthest end of the first tube 11 is the guide head 111. The space between the guide head 111 and the mounting head 112 is the instrument mounting position. When the interventional instrument is inserted, it is radially compressed and fitted onto the first tube 11. The distal end of the interventional instrument rests on the guide head 111, and the proximal end of the interventional instrument is connected to the mounting head 112 and further restricted by the locking member 131. The distal end of the second tube 12 has an enlarged loading section to enclose the interventional instrument. When released, the second tube 12 is retracted (slid towards the proximal end), and the interventional instrument is gradually exposed and expands radially. However, since the proximal end of the interventional instrument is locked onto the mounting head 112, even if the interventional instrument is fully 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 retracted so that the locking member 131 is away from the locking hole 115. Only then can the proximal end of the interventional instrument be fully released. This allows the interventional instrument to be retrieved, reloaded, and its position adjusted if the positioning is not good.

[0374] In one embodiment, the locking member 131 is rod-shaped, and 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 lock hole 115 by moving axially with the intermediate tube 13.

[0375] To ensure a balanced distribution of locking force, in a preferred embodiment, the locking element 131 consists of multiple straight rods arranged side by side. Each straight rod extends axially along the intermediate tube 13, and the multiple straight rods are evenly distributed circumferentially along the intermediate tube 13, for example, two to four rods.

[0376] The proximal end of the interventional device is generally equipped with a connecting ear. A positioning groove 117 corresponding to the connecting ear can be provided on the outer periphery of the mounting head 112 to further maintain the position of the connecting ear and prevent unnecessary axial slippage or relative rotation between the connecting ear and the mounting head 112.

[0377] When used in conjunction with binding wire, a wire-passing hole 116 can be provided on the mounting head 112 to facilitate the threading of the binding wire. The wire-passing hole 116 can be in the axial or radial direction of the mounting head 112. It can be a hole made in the mounting head 112 itself, or it can be achieved by using an auxiliary component with a hole. Of course, the auxiliary component is fixedly connected to the mounting head.

[0378] The connecting ear 101 has an annular connecting part at its distal end. The binding wire 134 passes through the annular connecting part and the wire hole 116, and leaves a wire loop 135 at the end. The locking member 131 passes through the wire loop 135 and enters the insertion lock hole 115, so that the wire loop 135 cannot be removed from the locking member 131, that is, the connecting ear 101 is bound to the mounting head 112.

[0379] Figure 43 As can be seen, when the lock 131 is released, it disengages from the lock hole 115, the wire ring 135 is released from its restraint, and after the connecting ear 101 moves further, the binding wire 134 can be pulled out of the annular connecting part to release the interventional device.

[0380] See Figures 44-46 In another embodiment, a positioning protrusion 118 corresponding to the connecting ear is provided on the outer 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. Additionally, a wire hole 116 extends radially and is precisely located on the positioning protrusion 118. There are two symmetrical positioning protrusions 118, and the wire hole 116 passes through both positioning protrusions 118 along their axial direction.

[0381] See Figures 47-50 In another embodiment, a positioning protrusion 118 corresponding to the connecting ear is provided on the outer 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.

[0382] Additionally, a tubular auxiliary component 119 is fixedly embedded on the outer periphery of the mounting head 112. The interior of the auxiliary component 119 is the wire hole 116, which extends axially along the mounting head 112.

[0383] There are various ways to wrap the binding wire, but it generally passes through the wire hole 116 and is in contact with the connecting lug and the locking member 131. After the locking member 131 is disengaged from the lock hole 115, the binding wire is released from the connecting lug, or the connecting lug is released together with the binding wire.

[0384] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0385] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A hydraulically driven interventional instrument delivery system, comprising multiple tubing components coaxially arranged from the inside out, and a control handle for driving the relative movement of the multiple tubing components, wherein the distal ends of each tubing component are used to cooperate in operating interventional instruments, and the proximal ends of each tubing component are connected to the control handle, characterized in that, The relative movement of each pipe component is driven by hydraulic means at the control handle; The control handle is provided with one or more hydraulic chambers, and a piston is slidably installed in each hydraulic chamber. The multiple pipes include a first pipe and a second pipe that are slidably nested from the inside out. The hydraulic chamber is a first hydraulic chamber, and the piston is a first piston that is slidably installed in the first hydraulic chamber. 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 connecting port. The proximal end of the second pipe enters the first chamber and is fixedly connected to the first piston. The proximal end of the first pipe passes through the second pipe out of the first piston, and then extends through the second chamber out of the first hydraulic chamber to connect to pistons in other hydraulic chambers or is fixed to the control handle.

2. The hydraulically driven interventional instrument delivery system according to claim 1, characterized in that, The distal end of the first tube is used to place interventional instruments. When the two tubes move relative to each other, the distal end of the second tube wraps around or releases the interventional instruments.

3. The hydraulically driven interventional instrument delivery system according to claim 2, characterized in that, An intermediate tube is coupled between the first tube and the second tube. The distal end of the intermediate tube is fixedly connected to the first tube for traction and bending, or the distal end of the intermediate tube is provided with a locking device to restrict the interventional instrument within the first tube.

4. The hydraulically driven interventional instrument delivery system according to claim 1, characterized in that, An intermediate pipe fitting is also coupled between the first pipe fitting and the second pipe fitting; The control handle has a second hydraulic chamber that is connected to the hydraulic drive circuit, and a second piston is provided in the second hydraulic chamber. The proximal end of the intermediate tube extends through the second tube out of the first piston, further into the second hydraulic chamber, and is fixedly connected to the second piston. The proximal end of the first tube extends through the intermediate tube past the second piston and further extends until it is fixedly connected to the control handle.

5. The hydraulically driven interventional instrument delivery system according to claim 4, characterized in that, 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 connecting port. The proximal end of the intermediate tube enters the third chamber and is fixedly connected to the second piston. The proximal end of the first tube passes through the intermediate tube, exits the second piston, and then extends out of the second hydraulic chamber through the fourth chamber.

6. A hydraulically driven interventional instrument delivery system, comprising multiple tubing components coaxially arranged from the inside out, and a control handle for driving the relative movement of the multiple tubing components, wherein the distal ends of each tubing component are used to cooperate in operating interventional instruments, and the proximal ends of each tubing component are connected to the control handle, characterized in that, The relative movement of each pipe component is driven by hydraulic means at the control handle; The control handle is fixedly mounted with a first cylinder and a second cylinder. The interior of the first cylinder is a first hydraulic chamber, and the interior of the second cylinder is a second hydraulic chamber. Each hydraulic chamber is connected to a hydraulic drive circuit. The first cylinder and the second cylinder are arranged coaxially from the far end to the near end.

7. The hydraulically driven interventional instrument delivery system according to claim 6, characterized in that, The multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting that are sequentially slidably nested from the inside out. A first piston is slidably installed in the first hydraulic chamber, and a second piston is provided in the second hydraulic chamber. The proximal end of the second pipe enters the first chamber and is fixedly connected to the first piston. The proximal end of the intermediate tube extends through the second tube out of the first piston, further into the second hydraulic chamber, and is fixedly connected to the second piston. The proximal end of the first tube extends through the intermediate tube past the second piston and further extends until it is fixedly connected to the control handle.

8. The hydraulically driven interventional instrument delivery system according to claim 7, characterized in that, The control handle includes a working part and a gripping part connected to the working part; The first cylinder and the second cylinder are fixed to the working part, and the hydraulic drive circuit includes: Hydraulic lines are used to provide fluid passages connecting to various hydraulic chambers; The control valve, connected to the hydraulic lines, is used to control the direction of fluid flow. A drive pump, connected to the hydraulic lines, is used to drive the flow of liquid.

9. The hydraulically driven interventional instrument delivery system according to claim 8, characterized in that, The drive pump includes: Pump housing fixed to the control handle and connected to the hydraulic drive circuit; An active working component installed within the pump casing to drive the flow of liquid; A drive component is movably mounted on the control handle and linked to the working component; the drive component is an operating button that is slidably or rotatably mounted on the grip. A reset element is disposed between the drive element and the control handle to cause the working element to reciprocate.

10. A hydraulically driven interventional instrument delivery system, comprising multiple tubing components coaxially arranged from the inside out, and a control handle for driving relative movement of the multiple tubing components, wherein the distal ends of each tubing component are used to cooperate in operating interventional instruments, and the proximal ends of each tubing component are connected to the control handle, characterized in that, The control handle is provided with one or more hydraulic chambers, and a piston is slidably installed in each hydraulic chamber. A hydraulic drive circuit for driving the relative movement of each pipe component through the piston is configured at the control handle. The hydraulic drive circuit includes: Hydraulic lines are used to provide fluid passages connecting to various hydraulic chambers; A drive pump is connected to the hydraulic lines to drive the flow of liquid. The multi-way switching valve has a drive-side interface connected to the inlet and outlet of the drive pump, and multiple working-side interfaces, wherein every two working-side interfaces are connected to one of the hydraulic chambers. The multi-way switching valve has multiple positions for switching the connection between the drive-side interface and different working-side interfaces to control the liquid flow direction.

11. The hydraulically driven interventional instrument delivery system according to claim 10, characterized in that, The multi-way switching valve includes a valve seat and a valve core that cooperate with each other; The valve seat has a valve cavity, and the side wall of the valve cavity has multiple interfaces for connecting the drive pump and each hydraulic cavity; The valve core is placed in the valve cavity and rotates to engage with it. The outer peripheral wall of the valve core is provided with multiple flow channels. When the valve core rotates to different positions, there are corresponding connections between the multiple flow channels and multiple interfaces.

12. The hydraulically driven interventional instrument delivery system according to claim 11, characterized in that, The multi-way switching valve is embedded in the control handle, and the control handle is provided with an indicator indicating the position of the multi-way switching valve; The valve core is connected to a wrench, and rotating the wrench to different angles points to the markings of different gear positions.

13. A hydraulically driven interventional instrument delivery system, comprising multiple tubing components coaxially arranged from the inside out, and a control handle for driving relative movement of the multiple tubing components, wherein the distal ends of each tubing component are used to cooperate in operating interventional instruments, and the proximal ends of each tubing component are connected to the control handle, characterized in that, The control handle is provided with multiple hydraulic chambers, and a piston is slidably installed in each hydraulic chamber. The control handle uses hydraulic means to drive the relative movement of each pipe. The multiple tubes include a first tube, an intermediate tube, and a second tube that slide and nest sequentially from the inside out. The distal end of the first tube is used to place an interventional device. When moving relative to the first and second tubes, the distal end of the second tube wraps around or releases the interventional device. The distal end of the intermediate tube is provided with a locking device to restrict the interventional device to the first tube.

14. The hydraulically driven interventional instrument delivery system according to claim 13, characterized in that, The intermediate pipe also serves as a pull tube.

15. The hydraulically driven interventional instrument delivery system according to claim 13, characterized in that, The first tube is provided with an installation head, and the installation head is provided with a locking hole; the distal end of the intermediate tube is fixed with a locking member, which is inserted into the locking hole when locked, and the interventional device is itself or tied to the locking member by a binding line. When the locking member is released, it is disengaged from the locking hole to release the interventional device.

16. The hydraulically driven interventional instrument delivery system according to claim 15, characterized in that, The mounting head is provided with a threading hole, and the interventional instrument has an annular connecting part. The binding wire passes through both the threading hole and the connecting part, and the end of the binding wire is provided with a loop for passing through the locking component.

17. The hydraulically driven interventional instrument delivery system according to claim 15, characterized in that, The locking element is rod-shaped, and a connecting seat is fixed inside the intermediate tube. The proximal end of the locking element is inserted and fixed to the connecting seat, and the distal end of the locking element cooperates with the lock hole by moving axially with the intermediate tube.

18. The hydraulically driven interventional instrument delivery system according to claim 17, characterized in that, The locking mechanism consists of multiple straight rods arranged side by side.

19. A cylinder for hydraulically driving multiple pipe fittings coaxially arranged from the inside out, wherein two radially adjacent pipe fittings include an outer pipe fitting and an inner pipe fitting, characterized in that... The cylinder has a hydraulic chamber inside, and a piston is slidably installed in the hydraulic chamber. The piston has a balance hole, and a balance valve core is installed at the position of the balance hole. The piston divides the hydraulic chamber into two chambers. When the pressure in the two chambers approaches the same level, the balance valve core opens to connect the two chambers. The piston includes: The fixed sealing part is sleeved on the outer pipe fitting and is fixedly and sealingly fitted with the outer wall of the outer pipe fitting; The sliding seal is fitted onto the inner pipe fitting and slides in a sealing fit with the outer wall of the inner pipe fitting. The fixed sealing part and the sliding sealing part are fixedly connected to each other by a connecting sleeve, and at least one of the fixed sealing part and the sliding sealing part slides and seals with the inner wall of the hydraulic cavity.

20. The cylinder barrel according to claim 19, characterized in that, Both the fixed sealing part and the sliding sealing part include a support frame and a sealing sleeve wrapped around the support frame. The connecting sleeve is fixed between the two support frames, and the balance hole is opened on the sealing sleeve.

21. The cylinder barrel according to claim 19, characterized in that, The radial gap between two adjacent pipes is the exhaust gap. The piston is also provided with an exhaust hole that communicates with the exhaust gap. The exhaust hole is located between the fixed sealing part and the sliding sealing part. When the pressure in the two chambers approaches the same level, the balancing valve core opens to connect the two chambers and the exhaust port.

22. The cylinder barrel according to claim 19, characterized in that, The balance valve core includes: The linkage rod slides through the balance hole on the fixed sealing part and the sliding sealing part, and has a clearance fit at the through part; Two sealing heads are fixed to the two ends of the linkage rod, respectively, and the balance hole is closed or opened accordingly under the pressure on both sides of the piston.

23. The cylinder barrel according to claim 21, characterized in that, 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 balance hole on opposite sides. The sealing head abuts against the recessed area when closing the balance hole.

24. A control handle for a hydraulically driven interventional instrument delivery system, characterized in that: The control handle is provided with one or more hydraulic chambers, and a piston is slidably installed in each hydraulic chamber. The piston is provided with a balance hole, and a balance valve core is installed at the position of the balance hole. The piston divides the hydraulic chamber into two chambers. When the pressure in the two chambers approaches the same level, the balance valve core opens to connect the two chambers.

25. A hydraulically driven interventional instrument delivery system, comprising multiple tubing components coaxially arranged from the inside out and a control handle for driving the relative movement of the multiple tubing components, characterized in that, The interventional instrument delivery system uses hydraulic power to drive the relative movement of each tube; The interventional device delivery system is provided with one or more hydraulic chambers, each hydraulic chamber having a piston slidably installed therein. The piston has a balance hole, and a balance valve core is installed at the position of the balance hole. The piston divides the hydraulic chamber into two chambers. When the pressure in the two chambers approaches the same level, the balance valve opens to connect the two chambers.

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