Interventional device delivery system facilitating single-handed operation

Abstract

An interventional device delivery system facilitating single-handed operation includes a plurality of pipe fittings (1) coaxially arranged from the inside out, and a control handle (2) for driving the relative movement of the plurality of pipe fittings (1). The distal ends of the respective pipe fittings (1) are used to cooperate with each other to operate the interventional device. The proximal ends of the respective pipe fittings (1) are connected to the control handle (2). A hydraulic drive circuit for driving the relative movement of the respective pipe fittings (1) is configured at the control handle (2). The hydraulic drive circuit includes at least one drive pump (5) for driving the flow of liquid, and a control valve for controlling the flow direction of the liquid. The control handle (2) has a gripping portion (22). The operating member of the drive pump (5) is arranged at the gripping portion (22), and the operating member of the control valve is adjacent to the gripping portion (22). The driving mode is further improved for the existing interventional device delivery system, and the control components are centrally arranged, making it more convenient for single-handed operation.

Description

Technical Field

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

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

[0003] The present invention further improves the driving method for the existing interventional device delivery system, and arranges the control components centrally, which is more convenient for single-handed operation.

[0004] The present application provides an interventional device delivery system convenient for single-handed operation, including a plurality of pipe fittings coaxially arranged from inside to outside, and a control handle for driving the relative movement of the plurality of pipe fittings. The distal ends of each pipe fitting are used to cooperate with each other to operate the interventional device, and the proximal ends of each pipe fitting are connected to the control handle. A hydraulic drive circuit for driving the relative movement of each pipe fitting is arranged at the control handle, and the hydraulic drive circuit includes at least one drive pump for driving the flow of liquid and a control valve for controlling the flow direction of the liquid;

[0005] The control handle is provided with a holding part, the operating part of the drive pump is arranged at the holding part, and the operating part of the control valve is adjacent to the holding part.

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

[0007] Optionally, the control valve adopts a multi-way switching valve, and the multi-way switching valve includes:

[0008] Two valve seats arranged oppositely, one of the valve seats is provided with an interface for accessing the driving side of the hydraulic drive circuit, and the other valve seat is provided with an interface for the working side of the hydraulic drive circuit;

[0009] A spool valve that is sealed and clamped by two valve seats and rotatably mounted, the spool valve having a communication hole, and when the spool valve rotates to different angles, the communication hole communicates the corresponding drive-side interface and the working-side interface;

[0010] A wrench linked to the spool valve for changing the rotation angle of the spool valve, and the wrench serves as an operating component of the control valve.

[0011] Optionally, the wrench and the holding portion are on the same side in the radial direction of the working portion.

[0012] Optionally, the wrench is located on the proximal side of the holding portion, and the driving member faces the wrench.

[0013] Optionally, an anti-disengagement blocking member is provided at one end of the holding portion away from the working portion.

[0014] Optionally, the anti-disengagement blocking member surrounds the wrench.

[0015] Optionally, the driving pump includes:

[0016] A pump housing fixed within the control handle and connected to the hydraulic drive circuit;

[0017] A working member movably installed within the pump housing for driving the flow of liquid;

[0018] A driving member movably installed on the holding portion and linked to the working member, and the driving member serves as an operating component of the driving pump;

[0019] A return spring acting between the control handle and the driving member.

[0020] Optionally, the control handle includes a working portion and the holding portion connected to the working portion, a cylinder with a piston is arranged within the working portion, and multiple pipe fittings penetrate into the cylinder and are connected to the piston or fixed relative to the cylinder, and the relative movement of each pipe fitting is driven hydraulically within the cylinder.

[0021] Optionally, the cylinder includes a first cylinder and a second cylinder axially butted in sequence, wherein a first piston is slidably installed within the first cylinder, a second piston is slidably installed within the second cylinder, and the multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting coaxially arranged from the inside out;

[0022] All pipe fittings enter from the distal end of the first cylinder, wherein the first pipe fitting is fixed to the first piston, after the intermediate pipe fitting extends out of the first piston, it enters the second cylinder via a sealing member and is fixed to the second piston, and after the first pipe fitting extends out of the second piston, it is fixed to the proximal end of the second cylinder.

[0023] Optionally, the wrench includes an annular sleeve disposed on the outer periphery of the valve core, and a hook portion fixed to the annular sleeve and extending outside the control handle; a one-way clutch mechanism is interlocked between the inner edge of the annular sleeve and the outer periphery of the valve core through mutual cooperation.

[0024] Optionally, the one-way clutch mechanism includes:

[0025] Ratchet teeth annularly distributed on the outer periphery of the valve core;

[0026] Elastic claws fixed to the inner periphery of the annular sleeve;

[0027] The wrench has relative forward and reverse directions with respect to the rotation direction of the valve core. When rotating forward, the elastic claws engage with the ratchet teeth to drive the valve core. When rotating reversely, the elastic claws deform and slip off from the ratchet teeth, and the wrench return member drives the wrench to rotate reversely.

[0028] Optionally, a protective tube is sleeved on the outermost periphery of the multiple pipe fittings. The proximal end of the protective tube is connected to the fixed sleeve. The radial gap between the outermost pipe fitting among the multiple pipe fittings and the protective tube is an exhaust gap, and an exhaust hole communicating with the exhaust gap is provided on the side wall of the fixed sleeve.

[0029] Optionally, the protective tube is fixedly inserted into one axial end of the fixed sleeve. The other axial end of the fixed sleeve is a connection end, which is inserted into the distal end of the cylinder barrel and fixed to the cylinder barrel by a buckle. A distal end seal plug matched with the inner wall of the cylinder barrel is sleeved on the outer periphery of the connection end;

[0030] A relief hole is provided on the distal end seal plug, and the outermost pipe fitting among the multiple pipe fittings is in sliding seal fit with the relief hole.

[0031] Optionally, the connection end has a flanged edge, and the distal end seal plug is sleeved on the flanged edge.

[0032] Optionally, at least two axially spaced convex rings are provided on the outer periphery of the distal end seal plug, and the distal end seal plug is in sealing fit with the inner wall of the cylinder barrel through each convex ring.

[0033] Optionally, a positioning groove is provided on the outer periphery of the fixed sleeve, and the control handle has two half shells that are mutually buckled, and the edges of the two half shells are snapped into the positioning groove.

[0034] Optionally, a blocking step is provided on the inner wall of the fixed sleeve, and the proximal end face of the protective tube abuts against the blocking step.

[0035] Optionally, a positioning disc is provided on the outer wall of the fixed sleeve, and the distal end face of the cylinder barrel abuts against the positioning disc.

[0036] Optionally, positioning holes are provided on the side wall of the cylinder barrel. The buckle includes an elastic arm extending from the positioning disk into the cylinder barrel, and a catch at the end of the elastic arm that cooperates with the positioning holes.

[0037] Optionally, one side in the circumferential direction of the catch has a chamfer structure for guiding the catch to rotate out of the positioning hole in the circumferential direction.

[0038] Optionally, a thickened area is provided on the side wall of the fixing sleeve, and the exhaust hole is provided in the thickened area.

[0039] Optionally, along the axial direction of the fixing sleeve, the exhaust hole is located between the blocking step and the positioning disk.

[0040] Optionally, a plurality of cylinder barrels are included which are axially butted in sequence. Adjacent cylinder barrels are connected by a isolation seal. One of the plurality of pipe fittings slidably seals through the isolation seal, and the isolation seal is detachably connected to adjacent cylinder barrels by a buckling method.

[0041] Optionally, the cylinder barrel includes a first cylinder barrel and a second cylinder barrel axially butted in sequence. A first piston is slidably installed in the first cylinder barrel, and a second piston is slidably installed in the second cylinder barrel. The pipe fitting includes a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting coaxially arranged from the inside to the outside;

[0042] All pipe fittings enter from the distal end of the first cylinder barrel. The first pipe fitting is fixed to the first piston. After the intermediate pipe fitting extends out of the first piston, it enters the second cylinder barrel through the isolation seal and is fixed to the second piston. After the first pipe fitting extends out of the second piston, it is fixed to the proximal end of the second cylinder barrel.

[0043] Optionally, the isolation seal includes:

[0044] A cylinder body having an axial direction. The two axial ends of the cylinder body are respectively placed into the corresponding cylinder barrels on both sides;

[0045] Two sealing plugs respectively fixed to one axial end of the cylinder body and respectively in sealing cooperation with the inner walls of the corresponding cylinder barrels. Each sealing plug is provided with an avoidance hole for the pipe fitting to pass through;

[0046] Two groups of buckles respectively fixed to one axial end of the cylinder body and respectively engaged with the corresponding cylinder barrels.

[0047] Optionally, the two axial ends of the cylinder body are respectively provided with outward flanges, and each sealing plug is respectively fixedly sleeved on the corresponding outward flange.

[0048] Optionally, at least two axially spaced convex rings are provided on the outer periphery of the sealing plug, and the convex rings are in sealing cooperation with the inner wall of the corresponding cylinder barrel.

[0049] Optionally, a positioning disk is provided on the outer periphery of the cylinder body, and the end faces of two adjacent cylinder barrels are respectively abutted against two opposite sides of the positioning disk.

[0050] Optionally, reinforcing ribs are respectively provided between the outer periphery of the cylinder body and two opposite sides of the positioning disk.

[0051] Optionally, in the radial direction of the cylinder body, the outer edge of the reinforcing rib abuts against the inner wall of the corresponding cylinder barrel.

[0052] Optionally, positioning holes are formed in the barrel walls of the cylinder barrels, the two groups of snap fasteners are fixed to two opposite sides of the positioning disk, each snap fastener includes an elastic arm extending from the positioning disk into the cylinder barrel, and a hook at the end of the elastic arm and cooperating with the positioning hole.

[0053] Optionally, the reinforcing ribs and the snap fasteners are alternately arranged uniformly along the circumferential direction of the cylinder body.

[0054] Optionally, the end of the hook is provided with a guiding inclined surface for guiding itself to axially enter the positioning hole along the cylinder body.

[0055] Optionally, a chamfer structure is provided on one side in the circumferential direction of the hook for guiding itself to rotate out of the positioning hole along the circumferential direction of the cylinder body.

[0056] Optionally, the hydraulic drive circuit includes a liquid storage tank, and the liquid storage tank includes:

[0057] A tank body with a tank opening and an inlet and an outlet communicating with the hydraulic drive circuit;

[0058] A buffer bladder, which is placed in the tank body and is in sealing cooperation with the tank opening;

[0059] A gland, which is buckled with the tank body and clamps and fixes the buffer bladder with the tank opening.

[0060] Optionally, on the side of the tank body away from the tank opening is a bottom wall, the bottom wall is provided with a liquid injection port, and a pipeline joint is installed at the liquid injection port.

[0061] Optionally, the tank body is installed inside the control handle, and only the pipeline joint is exposed outside the control handle.

[0062] Optionally, both the inlet and the outlet of the tank body are adjacent to the bottom wall.

[0063] Optionally, the buffer bladder is made of an elastic material and changes the internal volume of the tank body through its own deformation.

[0064] Optionally, the buffer bag is an open structure on the side facing the tank mouth, and the opening portion has an outer flange, which is clamped and fixed by the pressure cover and the tank mouth.

[0065] Optionally, the outer flange has an annular protrusion that abuts against the pressure cover.

[0066] Optionally, the wall of the buffer bladder has a corrugated structure that is retractable and deformable.

[0067] Optionally, the gland includes:

[0068] An annular frame clamping and fixing the buffer bag with the tank mouth;

[0069] An elastic hook extends from the annular frame toward one side of the tank body and matches with the tank body.

[0070] Optionally, the tank mouth is turned outward to form an interface platform, the annular frame and the top surface of the interface platform clamp and fix the buffer capsule, and the elastic hook abuts against the bottom surface of the interface platform.

[0071] Optionally, the top surface of the interface platform is surrounded by a flange that abuts against the buffer bag.

[0072] Optionally, the tank body includes a first tank body and a second tank body that are interconnected, and the buffer bag is arranged in the first tank body.

[0073] Optionally, the volume of the first tank body is greater than the volume of the second tank body.

[0074] Optionally, the top of the first tank body is provided with the tank mouth, and the bottom shape of the first tank body converges and transitions to the second tank body.

[0075] Optionally, in the multi-way switching valve, each valve seat is provided with a mounting groove on a side facing the valve core, a sealing gasket is fixedly embedded in the mounting groove, and is sealed against the valve core through the sealing gasket.

[0076] Optionally, mutually engaging positioning teeth are provided between the inner periphery of the mounting groove and the outer periphery of the sealing gasket.

[0077] Optionally, among the two valve seats, one valve seat is a first valve seat provided with the driving side interface, and the other valve seat is a second valve seat provided with the working side interface;

[0078] The first valve seat is provided with a liquid inlet hole communicating with the drive side interface on a side facing the valve core, and the first sealing gasket is provided with a first liquid passage hole corresponding to the position of the liquid inlet hole and communicating with each other;

[0079] The second valve seat is provided with a liquid outlet hole communicating with the working side interface on a side facing the valve core, and the second sealing gasket is provided with a second liquid hole corresponding to the position of the liquid outlet hole and communicating with each other;

[0080] When the valve core rotates to different angles, the connecting hole on the valve core connects the corresponding first liquid passage hole and the second liquid passage hole.

[0081] Optionally, there are two liquid inlet holes, and relative to the rotation axis of the valve core, each liquid inlet hole is located at a different radial position; the first liquid passage hole matches the position of the corresponding liquid inlet hole;

[0082] The valve core is provided with inner and outer annular grooves on one side facing the first valve seat, each annular groove is connected to one of the liquid inlet holes, and there are two communicating holes, each of which is connected to one of the annular grooves.

[0083] Optionally, the multi-way switching valve includes a wrench reset member acting between the wrench and at least one valve seat.

[0084] Optionally, the wrench includes an annular sleeve located at the outer periphery of the valve core, and a hooking portion fixed to the annular sleeve and extending to the outside of the control handle; the inner edge of the annular sleeve and the outer periphery of the valve core are linked by a mutually cooperating one-way clutch mechanism;

[0085] The wrench reset member is a coil spring extending around the valve core axis, one end of the coil spring is connected to the valve seat, and the other end is connected to the annular sleeve.

[0086] Optionally, the coil spring is two coils arranged side by side. In the axial direction of the valve core, each coil spring is located on both sides of the annular sleeve respectively. One end of each coil spring has a positioning bend for inserting into the corresponding side valve seat, and the other ends of each coil spring are connected to each other to form a positioning cross bar. The outer periphery of the annular sleeve is provided with a groove for accommodating the positioning cross bar.

[0087] Optionally, each valve seat is provided with a plug hole for the positioning bend to be inserted into.

[0088] Optionally, the one-way clutch mechanism includes:

[0089] Ratchet teeth distributed around the outer periphery of the valve core;

[0090] An elastic claw fixed to the inner circumference of the annular sleeve;

[0091] The wrench has a relative positive direction and a reverse direction relative to the rotation direction of the valve core. During the positive rotation, the elastic claw engages with the ratchet to drive the valve core. During the reverse rotation, the elastic claw deforms and slips off the ratchet, and the wrench reset member drives the wrench to rotate in the reverse direction.

[0092] Axially on the valve core, the outer periphery of the valve core includes three sections. The ratchet teeth are fixedly distributed on the middle section, and the two smooth sections are on both sides. The two coil springs are respectively sleeved on the smooth sections on the corresponding sides.

[0093] Optionally, the elastic claw extends along the circumferential direction of the annular sleeve and bends inward.

[0094] Optionally, 2 to 4 elastic claws are evenly distributed at intervals along the circumferential direction of the annular sleeve.

[0095] Optionally, the multiple pipe fittings include a first pipe fitting, a middle pipe fitting, and a second pipe fitting that are coaxially arranged from the inside to the outside;

[0096] The distal end of the first pipe fitting extends out of the middle pipe fitting, and an installation head for connecting the interventional device is provided at the extended part. A flexible control member is connected to the middle pipe fitting, and the control member has:

[0097] A holding state, in which the control member penetrates through the installation head and binds the interventional device to the installation head;

[0098] An open state, allowing the interventional device to completely detach from the installation head;

[0099] A locking member that cooperates with the control member is installed on the middle pipe fitting. The locking member is slidably fitted relative to the middle pipe fitting and switches different states of the control member when sliding.

[0100] Optionally, the control member is a lashing wire. The proximal end of the interventional device is provided with a plurality of connecting ears. In the holding state, the lashing wire directly passes through and pulls each connecting ear; or an annular wire sleeve is arranged between the connecting ears. In the holding state, the lashing wire bypasses the annular wire sleeve and indirectly pulls the connecting ear through the annular wire sleeve.

[0101] Optionally, there are multiple lashing wires, and the pulling positions of the lashing wires and the annular wire sleeve are evenly distributed along the circumferential direction of the interventional device.

[0102] Optionally, the locking member is configured to restrict the control member in the holding state. When the middle pipe fitting moves relative to the first pipe fitting, the locking member is triggered by the installation head and releases the control member into the open state.

[0103] Optionally, when the middle pipe fitting moves relative to the first pipe fitting, the moving direction of the middle pipe fitting is from the proximal end to the distal end;

[0104] Optionally, the way the locking member is triggered by the installation head is direct abutment or indirect force application through a transmission component.

[0105] Optionally, when the locking member is triggered by the mounting head, the moving direction of the locking member is from the distal end to the proximal end.

[0106] Optionally, the intermediate pipe fitting is located on the proximal side of the mounting head, and the interventional device is located on the distal side of the mounting head. A constriction guiding hole is formed in the mounting head, through which the control member passes to connect to the interventional device, and the proximal side of the interventional device is restricted to the constriction guiding hole in the holding state.

[0107] Optionally, in the holding state, the control member passes through the mounting head back and forth, and at least one of the back-and-forth paths passes through the constriction guiding hole.

[0108] Optionally, both the back-and-forth paths pass through the constriction guiding hole.

[0109] Optionally, there is one or more control members. For the same control member, the back-and-forth paths pass through the same constriction guiding hole.

[0110] Optionally, the mounting head is columnar and has an axial through hole, and the first pipe fitting penetrates through the axial through hole.

[0111] Optionally, the mounting head and the first pipe fitting are fixed to each other by at least one of welding, bonding, interference fit, and auxiliary connecting members.

[0112] Optionally, there are multiple constriction guiding holes. The proximal side of the interventional device is provided with connecting ears for passing through the control member. The connecting ears are divided into multiple groups. Before release, the connecting ears in the same group gather together to a corresponding constriction guiding hole.

[0113] Optionally, the multiple constriction guiding holes are evenly distributed along the circumferential direction of the mounting head.

[0114] Optionally, the number of the constriction guiding holes is 2 to 4.

[0115] Optionally, the constriction guiding hole extends along the axial direction of the first pipe fitting and penetrates through the mounting head.

[0116] Optionally, the opening part of the constriction guiding hole on the proximal side is provided with a guiding flaring.

[0117] Optionally, a fixed base and a slidable movable seat are installed on the intermediate pipe fitting. A locking member and an unlocking rod are fixed on the movable seat. The unlocking rod penetrates through the base and the end protruding out of the base serves as a trigger end. A lock hole for receiving the locking member is formed in the base;

[0118] The control member is sleeved on the locking member in a retaining state, and the end of the locking member is inserted into the locking hole. When the intermediate tube moves toward the distal end relative to the first tube, the trigger end of the unlocking rod abuts against the mounting head and drives the locking member to move toward the proximal end to exit the locking hole, so that the control member enters an open state.

[0119] Optionally, the movable seat includes:

[0120] An annular portion, slidably sleeved on the intermediate pipe and located at the proximal end side of the base;

[0121] The locking element is rod-shaped and extends from the annular portion to the distal end.

[0122] The unlocking rod extends from the annular portion toward the distal end, and the extension length is greater than the locking element.

[0123] Optionally, one end of the binding wire has a fixed wire loop, and the other end has a movable wire loop;

[0124] In the holding state, the fixed wire loop is sleeved on the unlocking rod, and the movable wire loop is sleeved on the locking element;

[0125] In the open state, the fixed wire loop is sleeved on the unlocking rod, and the movable wire loop is separated from the locking element.

[0126] Optionally, the control member is a binding wire;

[0127] In the holding state, the binding wire is directly or indirectly passed around the interventional device, and both ends of the binding wire are relatively fixed to the locking element;

[0128] In the open state, at least one end of the binding wire is separated from the locking element to release the restraint on the interventional instrument.

[0129] Optionally, a fixed base and a slidable movable base are mounted on the intermediate tube, a lock and an unlocking rod are fixed on the movable base, the unlocking rod penetrates the base from the proximal end to the distal end and one end of the unlocking rod passes through the base as a trigger end, and a lock hole for receiving the lock is provided on the base;

[0130] Optionally, the control member is sleeved on the lock member in a retaining state, and the end of the lock member is inserted into the lock hole;

[0131] Optionally, when the intermediate tube moves distally relative to the first tube, the trigger end of the unlocking rod abuts against the mounting head and drives the locking element to move proximally out of the locking hole, so that the control element enters an open state.

[0132] Optionally, in the holding state, there is a tight fit between the base and the movable seat. When the intermediate pipe fitting moves distally relative to the first pipe fitting, the movable seat follows the base until the trigger end of the unlocking rod abuts against the mounting head.

[0133] Optionally, a guiding hole for the unlocking rod to penetrate is provided on the base. In the open state, at least a part of the unlocking rod remains in the guiding hole.

[0134] Optionally, the base has an axial channel, and the distal part of the intermediate pipe fitting is inserted and fixed in the axial channel. The base includes:

[0135] A proximal disk, which is provided with avoidance holes for the locking member and the unlocking rod to pass through respectively;

[0136] A distal disk, which is provided with a locking hole for cooperating with the locking member and a guiding hole for the unlocking rod to penetrate;

[0137] A transition section, which is fixedly connected between the proximal disk and the distal disk.

[0138] Optionally, a receiving groove is provided on one side of the proximal disk facing the annular part. The proximal ends of the locking member and the unlocking rod are connected by the annular part. In the holding state, the annular part is located in the receiving groove, and the avoidance holes are provided at the bottom of the receiving groove.

[0139] Optionally, the locking members and the unlocking rods are arranged alternately at intervals.

[0140] Optionally, there are two locking members and two unlocking rods respectively, and they are arranged alternately at uniform intervals.

[0141] Optionally, the outer periphery of the transition section is a fitting area that is radially retracted relative to the proximal disk and the distal disk. In the holding state, the connection parts of the binding wire with the locking member and the unlocking rod are both located in the fitting area.

[0142] Optionally, in the open state, the locking member withdraws from the locking hole until the distal part of the locking member is adjacent to the proximal disk.

[0143] Optionally, a wire passing groove for the binding wire to pass through is provided on the outer periphery of the distal disk.

[0144] Optionally, the wire passing groove is open to the outer periphery of the distal disk.

[0145] Optionally, a support sleeve is fixed on the intermediate pipe fitting, and the outer wall of the support sleeve is close to the inner wall of the second pipe fitting.

[0146] Optionally, the support sleeve is located at the proximal end of the base and is arranged at intervals, and the sliding stroke of the movable seat is limited between the support sleeve and the base. The support sleeve has a first guiding surface on the side facing the proximal end, which gradually tapers from the distal end to the proximal end.

[0147] Optionally, the support sleeve has a second guiding surface on the side facing the distal end, which gradually tapers from the proximal end to the distal end. When the movable seat moves proximally to the limit position, it abuts against the second guiding surface.

[0148] Certainly, when combined with the control handles of the aforementioned hydraulic drive, the present application also provides an interventional device delivery system, including a release control mechanism adopting the aforementioned structure, and a control handle for driving the release control mechanism. The proximal ends of the pipe fittings in the release control mechanism are connected to the control handle, and the relative movement of the pipe fittings is driven in a hydraulic manner at the control handle.

[0149] The present application also provides a method for releasing an interventional device, wherein the interventional device is loaded into the release control mechanism. The release control mechanism includes a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting that are slidably nested with each other from the inside out in sequence. The distal end of the first pipe fitting extends out of the intermediate pipe fitting, and an installation head for connecting the interventional device is provided at the extended part. The intermediate pipe fitting is connected with a flexible control member and a locking member that cooperates with the control member. The proximal end of the interventional device is bound to the installation head by the control member in a compressed state, and the interventional device is wrapped by the second pipe fitting;

[0150] The release method includes:

[0151] Sliding the second pipe fitting proximally relative to the first pipe fitting until the interventional device is completely exposed;

[0152] Sliding the intermediate pipe fitting distally relative to the first pipe fitting, causing the control member to follow distally and allowing the proximal end of the interventional device to gradually move away from the installation head;

[0153] Driving the locking member to move to release the control member, so that the interventional device is completely released.

[0154] Optionally, a fixed base and a slidable movable seat are installed on the intermediate pipe fitting. A locking member and an unlocking rod are fixed on the movable seat. The unlocking rod penetrates through the base from the proximal end to the distal end, and the end of the unlocking rod that passes through the base is used as a trigger end. A lock hole for receiving the locking member is provided on the base;

[0155] The control member is sleeved on the locking member in a holding state, and the end of the locking member is inserted into the lock hole;

[0156] The base and the movable seat are in a tight fit. When the intermediate pipe fitting is slid distally relative to the first pipe fitting, the movable seat follows the base, causing the control member to move distally along with it.

[0157] Optionally, the way to drive the locking member to move and release the control member is to slide the intermediate pipe fitting distally relative to the first pipe fitting until the triggering end of the unlocking rod abuts against the mounting head.

[0158] When the intermediate pipe fitting is further slid distally, the unlocking rod drives the movable seat away from the base under the block of the mounting head, and drives the locking member out of the locking hole, so that the control member is released.

[0159] Optionally, a support sleeve is fixed on the intermediate pipe fitting. The outer wall of the support sleeve is close to the inner wall of the second pipe fitting. The support sleeve is located at the proximal end of the base and is arranged at intervals. When the intermediate pipe fitting is further slid distally, until the movable seat abuts against the support sleeve or until the base abuts against the mounting head.

[0160] Optionally, after the interventional device is completely released, the release control mechanism is retracted proximally.

[0161] Optionally, when retracting the release control mechanism proximally, first slide the intermediate pipe fitting proximally relative to the first pipe fitting to separate the base from the mounting head.

[0162] The first pipe fitting and the intermediate pipe fitting are retracted into the second pipe fitting, and all the pipe fittings are retracted proximally synchronously.

[0163] Optionally, at the proximal end, a control handle is used to drive the relative movement of each pipe fitting in a hydraulic manner. Optionally, a first cylinder and a second cylinder are sequentially butted axially in the control handle. A first piston is slidably installed in the first cylinder, and a second piston is slidably installed in the second cylinder.

[0164] All the pipe fittings enter from the distal end of the first cylinder. The first pipe fitting is fixed to the first piston. After the intermediate pipe fitting extends out of the first piston, it enters the second cylinder through the isolation seal and is fixed to the second piston. After the first pipe fitting extends out of the second piston, it is fixed to the proximal end of the second cylinder.

[0165] A hydraulic drive circuit for driving the relative movement of each pipe fitting through the piston is also configured at the control handle.

[0166] Optionally, before releasing the control member, the interventional device is also adjusted, including:

[0167] Slide the intermediate pipe fitting proximally relative to the first pipe fitting, so that the control member pulls the interventional device until the proximal end of the interventional device is constricted;

[0168] Slide the second pipe fitting distally relative to the first pipe fitting, so that at least a part of the interventional device is received in the second pipe fitting.

[0169] Optionally, the control member is a ligature;

[0170] Before release, the ligature directly or indirectly passes around the interventional device, and both ends of the ligature are relatively fixed to the locking member;

[0171] After release, at least one end of the ligature is separated from the locking member to release the restraint on the interventional device.

[0172] Optionally, one end of the ligature is provided with a fixed wire loop, and the other end is provided with a movable wire loop; the fixed wire loop is sleeved on the unlocking rod, and the movable wire loop is sleeved on the locking member;

[0173] Or, one end of the ligature is fixed to the base or the mounting head, and the other end is a movable wire loop, which is sleeved on the locking member.

[0174] Optionally, a guiding hole is formed in the mounting head, and the ligature passes through the guiding hole to connect to the interventional device.

[0175] Optionally, the interventional device is a vena cava valve.

[0176] Optionally, a circular wire sleeve matching with the control member is arranged at the proximal end of the interventional device.

[0177] The present application further provides an interventional device delivery system, including a release control mechanism and a control handle for driving the release control mechanism. The proximal ends of the pipe fittings in the release control mechanism are connected to the control handle, and the relative movement of the pipe fittings is driven in a hydraulic manner at the control handle; wherein the interventional device is loaded into the release control mechanism, and the release control mechanism includes a first pipe fitting, an intermediate pipe fitting and a second pipe fitting which are slidably nested and matched with each other from inside to outside in sequence. The distal end of the first pipe fitting extends out of the intermediate pipe fitting, and a mounting head for connecting the interventional device is arranged at the extending part. A flexible control member and a locking member matching with the control member are connected to the intermediate pipe fitting. The proximal end of the interventional device is restrained by the control member on the mounting head in a compressed state, and the interventional device is wrapped by the second pipe fitting;

[0178] When the interventional device is released:

[0179] Slide the second pipe fitting proximally relative to the first pipe fitting until the interventional device is completely exposed;

[0180] Slide the intermediate fitting distally relative to the first fitting, causing the control member to follow distally and allowing the proximal end of the intervention device to gradually move away from the mounting head;

[0181] Drive the locking member to move to release the control member, so that the intervention device is disengaged from the mounting head and completely released.

[0182] The intervention device delivery system of the present application adopts a hydraulic drive mode and is more convenient for single-handed operation. The corresponding functions can be switched through the hydraulic drive circuit in combination with the surgical steps. Brief Description of the Drawings

[0183] Figure 1 It is a schematic structural diagram of an embodiment of the intervention device delivery system of the present application;

[0184] Figure 2a It is a schematic structural diagram of the distal part of the intervention device delivery system of the present application;

[0185] Figure 2b It is a schematic structural diagram of the intervention device adopted in an embodiment of the present application;

[0186] Figure 2c It is a schematic structural diagram of the intervention device adopted in another embodiment of the present application;

[0187] Figure 2d It is a schematic structural diagram of the intervention device in the loaded state;

[0188] Figure 2e It is a schematic structural diagram of the intervention device in the semi-released state;

[0189] Figure 2f It is a schematic structural diagram of the intervention device in the released state;

[0190] Figure 3a It is a schematic internal structural diagram of an embodiment of the intervention device delivery system of the present application;

[0191] Figure 3b It is Figure 3a a schematic structural diagram of the intervention device delivery system after removing the movable cover and one of its half shells;

[0192] Figure 3c It is Figure 3a a cross-sectional view of the intervention device delivery system;

[0193] Figure 3d It is a schematic structural diagram of the cylinder part in the intervention device delivery system;

[0194] Figure 3e It is Figure 3d a schematic structural diagram of the cylinder and the remaining components disassembled in ;

[0195] Figure 3fEnlarged view of the distal part of the control handle;

[0196] Figure 3g Schematic diagram of the spare interface provided on the cylinder barrel;

[0197] Figure 3h For Figure 3g Another perspective schematic diagram of the cylinder barrel in

[0198] Figure 4 For Figure 3c Enlarged view of part C in

[0199] Figure 5 For Figure 3c Enlarged view of part B in

[0200] Figure 6a Exploded view of the fixing sleeve and the distal end seal plug in an embodiment of the interventional device delivery system of the present application;

[0201] Figure 6b For Figure 6a Schematic diagram of the structure after the fixing sleeve and the distal end seal plug are assembled in

[0202] Figure 6c For Figure 6a Schematic diagram of the structure of the fixing sleeve from another angle in

[0203] Figure 6d Schematic diagram of the structure of the mating part between the fixing sleeve and the cylinder barrel;

[0204] Figure 7a Exploded view of the isolation seal in an embodiment of the interventional device delivery system of the present application;

[0205] Figure 7b For Figure 7a Schematic diagram of the structure after the isolation seal is assembled in

[0206] Figure 7c For Figure 7b Schematic diagram of the structure of the isolation seal from another angle in

[0207] Figure 7d For Figure 3c Enlarged view of part D in

[0208] Figure 7e For Figure 7a Schematic diagram of the structure of the mating part between the isolation seal and two cylinder barrels in

[0209] Figure 8a Schematic diagram of the structure of the proximal part of the cylinder barrel;

[0210] Figure 8b Schematic diagram of the structure after the pipeline joint and the proximal seal plug are assembled;

[0211] Figure 8c is Figure 8b Another perspective structural schematic diagram of the pipeline joint and the proximal end sealing plug after assembly;

[0212] Figure 8d is Figure 8b Exploded view of the pipeline joint and the proximal end sealing plug;

[0213] Figure 9a Structural schematic diagram of the liquid storage tank in an embodiment of the intervention device delivery system of the present application;

[0214] Figure 9b is Figure 3c Enlarged view of part E;

[0215] Figure 9c is Figure 9a Exploded view of the components of the liquid storage tank;

[0216] Figure 10 Exploded view of the components of the drive pump in an embodiment of the intervention device delivery system of the present application;

[0217] Figure 11a Structural schematic diagram of the multi-way switching valve in an embodiment of the intervention device delivery system of the present application;

[0218] Figure 11b is Figure 11a Structural schematic diagram of the valve core of the multi-way switching valve;

[0219] Figure 12a Structural schematic diagram of the multi-way switching valve in another embodiment of the intervention device delivery system of the present application;

[0220] Figure 12b is Figure 12a Structural schematic diagram of another perspective of the multi-way switching valve;

[0221] Figure 12c is Figure 12a Exploded view of the components of the multi-way switching valve (valve seat held in place);

[0222] Figure 12d is Figure 12a Exploded view of the components of the multi-way switching valve from another perspective;

[0223] Figure 12e is Figure 12a Exploded view of the components of the multi-way switching valve from another perspective;

[0224] Figure 13a Schematic diagram of the hydraulic working principle in an embodiment of the intervention device delivery system of the present application;

[0225] Figure 13b is Figure 13aEnlarged view of the D1 part in the middle gear position;

[0226] Figure 14a Schematic structural diagram of the distal part in an embodiment of the intervention device delivery system of the present application;

[0227] Figure 14b is Figure 14a Exploded view of the lock and related components in

[0228] Figure 14c is Figure 14a Exploded view of the lock and related components from another angle in

[0229] Figure 14d is Figure 3c Enlarged view of part A in

[0230] Figure 15a - Figure 15c Schematic diagram of the change of the lock in different states;

[0231] Figure 16a - Figure 16d Schematic diagram of the change of the lock together with the intervention device in different states;

[0232] Figure 17 Schematic diagram of the connection method of the lashing wire on the stent of the intervention device;

[0233] Figure 18a is Figure 17 Schematic diagram of the application scenario of the intervention device in

[0234] Figure 18b is Figure 17 Schematic structural diagram of the intervention device after being covered with a film in

[0235] Figure 18c is Figure 17 Schematic diagram of the segmentation of the stent of the intervention device in

[0236] Figure 19a - Figure 19e Schematic diagram of the cooperation between the lashing wire and the annular wire sleeve on the stent in different embodiments.

[0237] The explanations of the reference numerals in the figure are as follows:

[0238] 1. Pipe fittings; 11. First pipe fitting; 11a. Distal end segment; 11b. Proximal end segment; 111. Guide head; 112. Mounting head; 1121. Converging guide hole; 1122. Guiding flaring; 113. Pipeline joint; 1131. Positioning disk; 1132. Hook; 12. Second pipe fitting; 121. Loading segment; 13. Intermediate pipe fitting; 14. Protection tube; 15. Base; 151. Proximal disk; 1511. Avoidance hole; 1512. Accommodating groove; 152. Distal disk; 1521. Wiring groove; 1522. Lock hole; 1523. Guide hole; 153. Transition segment; 16. Movable seat; 161. Annular part; 162. Locking part; 163. Unlocking rod; 1631. Trigger end; 17. Support sleeve; 171. First guiding surface; 172. Second guiding surface; 18. Binding wire; 181. Fixed wire loop; 182. Movable wire loop; 19. Annular wire sleeve; 191. Crossing segment;

[0239] 2. Control handle; 21. Working part; 211. Distal end; 212. Proximal end; 22. Holding part; 23. Positioning component; 24. First half shell; 25. Second half shell; 26. Positioning post; 27. Shielding cover; 271. First fitting; 272. Second fitting; 273. First assembly groove; 274. Second assembly groove; 28. Anti-disengagement blocking part;

[0240] 3. Cylinder barrel; 31. First cylinder barrel; 311. First hydraulic cavity; 312. First chamber; 313. Second chamber; 314. Communication port; 315. Communication port; 32. Second cylinder barrel; 321. Second hydraulic cavity; 322. Third chamber; 323. Fourth chamber; 324. Communication port; 325. Communication port; 326. Spare interface; 327. Spare interface; 328. Spare interface; 329. Spare interface; 33. Hydraulic pipeline; 331. First check valve; 332. Second check valve; 34. Isolation seal; 341. Cylinder body; 342. Positioning disk; 343. Turned-out edge; 344. Reinforcing rib; 345. Snap fastener; 3451. Elastic arm; 3452. Hook; 3453. Guiding inclined surface; 3454. Chamfer structure; 346. Sealing plug; 3461. Convex ring; 35. Distal end sealing plug; 351. Convex ring; 36. Proximal end sealing plug; 361. Convex ring;

[0241] 4. First piston; 41. Support frame; 42. Sealing sleeve; 43. Through hole;

[0242] 5. Driving pump; 51. Pump housing; 52. Working part; 53. Driving part; 531. Shaft hole; 54. Inlet; 55. Outlet; 56. Return spring; 57. Pump chamber;

[0243] 6. Multi-way switching valve; 61. Valve seat; 61a. First valve seat; 61b. Second valve seat; 611. First sealing gasket; 6111. First positioning tooth; 6112. First liquid passing hole; 613. Liquid inlet hole; 614. Second positioning tooth; 615. Third positioning tooth; 616. Liquid outlet hole; 617. Second sealing gasket; 6171. Fourth positioning tooth; 6172. Second liquid passing hole; 618. Cap; 619. Jack; 62. Valve core; 621. Rotating shaft; 622. Ratchet teeth; 623. Annular groove; 624. Communication hole; 625. Smooth section; 63. Wrench; 631. Annular sleeve; 632. Elastic claw; 633. Hook portion; 634. Card slot; 64. Mark; 65. Interface; 66. Flow channel; 67. Driving side interface; 68. Working side interface; 69. Wrench reset part; 691. Positioning cross bar; 692. Positioning bend;

[0244] 7. Liquid storage tank; 71. Liquid injection port; 72. Spare joint; 73. Inlet; 74. Outlet; 75. Tank body; 75a. First tank body; 75b. Second tank body; 751. Interface platform; 752. Flange; 76. Gland; 761. Elastic hook; 77. Buffer bladder; 771. Turned-out edge; 772. Annular protrusion;

[0245] 8. Fixed sleeve; 81. Through hole; 82. Exhaust hole; 83. Positioning groove; 84. Turned-out edge; 85. Blocking step; 86. Positioning disc; 861. Reinforcing rib; 87. Buckle; 871. Elastic arm; 872. Hook; 873. Chamfer structure; 88. Thickened area;

[0246] 9. Second piston;

[0247] 10. Bracket; 101. Connecting ear; 102. Flap; 103. Expanding mask; 104. Outflow section; 105. Waist; 106. Inflow section;

[0248] 1000. Right atrium; 1100. Right ventricle; 1200. Lower vena cava; 1300. Upper vena cava;

[0249] M1. Connection point; M2. Connection point. Detailed implementation manners

[0250] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0251] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time.

[0252] It should be noted that the terms "proximal end" and "distal end" are relative to the operator. For example, in a catheter or sheath involved in the text, the "proximal end" refers to the end close to the operator, that is, the end that enters the body away from the lesion during use (for example, the end of the catheter connected to the control handle), while the "distal end" is the end away from the operator, that is, the end that enters the body close to the lesion during use (for example, the position at the end of the catheter). Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0253] This delivery system can be used to treat heart valves (for example, mitral valve, aortic valve, tricuspid valve, vena cava valve, pulmonary valve). For example, by loading a valve or stent at the distal end of this delivery system, treating aortic stenosis, mitral and tricuspid regurgitation problems, or by loading a vena cava valve and implanting a vena cava valve at the superior and inferior vena cava to solve right heart problems such as tricuspid regurgitation; this treatment can include, but is not limited to, valve replacement, valve repair or other surgeries that affect valve function. This system and method can use a transcatheter approach, such as a catheter system delivered through a vein or femoral artery route; or other minimally invasive surgical methods, including but not limited to delivering a catheter through a transapical approach.

[0254] See Figure 1 , the interventional device delivery system of one embodiment of this application includes a catheter system. The catheter system includes a plurality of pipe fittings 1 arranged coaxially from the inside to the outside, and a control handle 2 for driving the relative movement of the plurality of pipe fittings 1. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings are connected to the control handle 2. The relative movement of the pipe fittings is driven by a hydraulic method at the control handle 2.

[0255] This application uses a hydraulic method to drive the pipe fittings at the control handle to realize the operation of the interventional device, such as release, cutting, rotation, grasping or recovery, etc. The entire hydraulic system is configured at the proximal end, which is more convenient for on-site debugging or assembly. Even if an unexpected situation occurs, it is also convenient to solve outside the body. If a hydraulic mechanism is configured at the distal end, more stringent requirements are imposed on the equipment volume and safety, and the forms and directions of movement that can be regulated are also limited due to equipment problems.

[0256] Multiple pipe fittings are understood to be at least two. Specifically, sliding fit can be adopted between any two pipe fittings, that is, all parts between the two pipe fittings have axial relative displacement during movement. Of course, if a deformable connecting piece is additionally arranged between the two pipe fittings, the relative movement relationship of the connecting piece shall be considered separately.

[0257] It can also be two of the pipe fittings. For example, partial fixed connection (such as mutual fixation at the distal part) is adopted between two adjacent ones in the radial direction. Since these two are only fixed to each other at the distal part, a small amount of relative displacement between them is still allowed at the proximal part. Of course, this relative movement will cause deformation and bending of one of them after being transmitted to the distal part. Utilizing this feature can realize the bending adjustment of the distal end of a certain pipe fitting.

[0258] The number of pipe fittings 1 can be two, three or more. The relative movement of different pipe fittings 1 can realize corresponding operations on the interventional instrument at the distal end (far from the operator, that is, the end that enters the body and approaches the lesion during use, and the proximal end is vice versa), such as delivery, release, attitude adjustment, recovery, etc. For each pipe fitting 1 itself and the realization of the distal function, it can be implemented according to conventional techniques. Of course, improvements on the distal structure of the pipe fitting are also provided in the following text. One of the key points of this application is to adopt a liquid drive mode at the operation handle to drive the relative movement of different pipe fittings.

[0259] See Figure 2a , in one of the embodiments, multiple pipe fittings include a first pipe fitting 11, an intermediate pipe fitting 13 and a second pipe fitting 12 that are sequentially sleeved and slid from the inside to the outside, where:

[0260] The distal end of the first pipe fitting 11 is used to place the interventional instrument; the first pipe fitting 11 and the interventional instrument can be separated from each other in the body, that is, the interventional instrument remains in the body, or they can be connected to each other. After the operation is completed, the interventional instrument does not remain in the body, but is withdrawn to the outside of the body together with the first pipe fitting 11.

[0261] The outermost distal end of the first pipe fitting 11 is a guiding head 111, and a mounting head 112 is also fixed at the proximal part adjacent to the guiding head 111. When the interventional instrument is loaded, it is located between the guiding head 111 and the mounting head 112 and is radially compressed. Generally, the interventional instrument has connecting ears,

[0262] The connecting ear is the part where the interventional instrument is connected to the delivery system. Relative to the stent, the connecting ear can be a mesh hole on the end of the stent, or a perforated connecting part extending outward relative to the stent body, such as Figure 2bThe connecting ear 101 shown; in the prior art, the outer wall of the mounting head is usually provided with a groove or a convex head for cooperating with the connecting ear of the interventional instrument. During loading, the connecting ear is engaged with the groove of the mounting head 112 or hung on the convex head to limit the axial position of the interventional instrument. For more fixing methods of the connecting ear and the mounting head, reference can be made to the patent WO2019080857A1.

[0263] The distal end of the second pipe fitting 12 is provided with a loading section for wrapping or releasing the interventional instrument. In other embodiments, a protective tube 14 fixedly connected to the control handle can also be sleeved outside the proximal end of the second pipe fitting 12.

[0264] The distal end of the intermediate pipe fitting 13 is provided with a locking member for restricting the interventional instrument in the first pipe fitting 11; the axial sliding of the intermediate pipe fitting 13 relative to the first pipe fitting 11 can cause the locking member to change the mating relationship with the mounting head on the first pipe fitting 11;

[0265] In other embodiments, the distal end of the intermediate pipe fitting 13 can be fixedly connected to the first pipe fitting 11 for traction and bending adjustment to change the attitude of the interventional instrument for accurate positioning.

[0266] The connecting part at the distal ends of the intermediate pipe fitting 13 and the first pipe fitting 11 can be adjacent to the mounting head on the first pipe fitting 11, for example, on the proximal side of the mounting head. Of course, the distal end of the intermediate pipe fitting 13 can also be directly fixed to the mounting head.

[0267] See Figure 2b , Figure 2c , the interventional instrument involved in the present application has no strict limitation in the specific shape. For example, it may include a stent 10, with a connecting ear 101 at one axial end of the stent 10. The connecting ear 101 can have an expansion head at the end, and can also have an annular or C-shaped connecting part.

[0268] The stent 10 is made of nickel-titanium alloy or stainless steel, has a radially compressible or expandable structure, and is generally a net-like tubular structure formed by laser cutting or weaving. A biological membrane can be sewn or not sewn inside the stent.

[0269] Combined with Figure 2d - Figure 2fThe distal end of the second tube 12 is the loading section 121. In the loading state, the interventional device is radially compressed. The loading section 121 is wrapped around the outer periphery of the interventional device to limit the radial expansion of the interventional device. After the interventional device is in place, the second tube 12 is driven by the control handle to slide axially relative to the first tube 11, so that the interventional device is gradually exposed in the human body vessels to allow the interventional device to expand radially. The interventional device enters a semi-released state from the expansion of the distal end. As the second tube 12 is further withdrawn, the interventional device is fully exposed. Finally, the connection ear of the interventional device is separated from the installation head and enters a released state, completing the release of the interventional device. During the whole process, the axial relative sliding of the first tube 11 and the second tube 12 is driven by the control handle 2.

[0270] The first tube 11 and the second tube 12 are plastic tubes or metal tubes commonly used in the field of interventional instruments, such as cut hypotubes or metal braided tubes or a mixture of metal braided tubes and hypotubes, or a mixture of polymer and metal tubes. The first tube 11 and / or the second tube 12 can also be a multi-layer composite tube.

[0271] See also Figure 3a - Figure 3e The shape of the control handle 2 is not strictly limited. In order to facilitate the packaging of other components, a split structure can be adopted, that is, the shell of 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.

[0272] In order to facilitate the mutual fixation between the first half shell 24 and the second half shell 25, various methods such as buckles and fasteners can be used. In this embodiment, at least one of the first half shell 24 and the second half shell 25 is provided with a positioning column 26, and a screw hole is provided on the positioning column 26, and the other is correspondingly provided with a mounting hole for passing a bolt, and the two are fixed by bolts;

[0273] Or both are provided with positioning posts 26 and their positions match, one of the positioning posts has a positioning hole, and the other positioning post is directly inserted into the corresponding positioning hole.

[0274] In other embodiments, the first half shell 24 and the second half shell 25 may also be fixed by snapping, bonding or welding.

[0275] In different embodiments, the hydraulic chamber is directly opened in the control handle 2, or the control handle 2 is fixedly mounted with a cylinder 3, and the interior of the cylinder 3 is the hydraulic chamber.

[0276] There is no strict restriction on the cross section of the cylinder 3. Preferably, the outer periphery is surrounded by a smooth curve, such as a circle or an ellipse. Taking the circular cross section as an example, it can be seen in the figure that the whole is cylindrical.

[0277] To protect the cylinder barrel 3, the first half shell 24 and the second half shell 25 enclose and surround the cylinder barrel 3. In a preferred embodiment, a positioning component 23 that cooperates with the cylinder barrel 3 is provided on the control handle 2. The positioning component 23 is one or more positioning steps, and the shape of the positioning steps corresponds to the outer contour of the cylinder barrel 3 to clamp and fix the cylinder barrel 3. Although the shape of the control handle 2 is not strictly limited, for the convenience of operation, in a preferred embodiment, the control handle 2 includes a working portion 21 and a holding portion 22 connected to the working portion 21. The cylinder barrel 3 is located within the working portion 21, that is, the working portion 21 as a whole is used to provide a hydraulic chamber. The working portion 21 has opposite distal end 211 and proximal end 212.

[0278] The shape of the holding portion 22 is convenient for holding and operating. For example, it has a length direction as a whole. Since the cylinder barrel is installed in the working portion 21, taking the movement direction of the piston in the cylinder barrel as the axial direction of the cylinder barrel, in this embodiment, the length direction of the holding portion 22 is substantially perpendicular to the axial direction of the cylinder barrel, or slightly obliquely intersects. As far as the two parts of the working portion 21 and the holding portion 22 are concerned, as a whole, it is in an L shape. In order to further improve the holding feel and conform to the shape characteristics of the hand, in this embodiment, the overall shape of the control handle 2 is similar to the shape of a pistol. Hydraulic drive control components, such as switches, etc. can be arranged on the holding portion 22 for easy one-handed operation.

[0279] In other embodiments, the length direction of the holding portion 22 can also be substantially parallel to the axial direction of the cylinder barrel, or even aligned with each other. Then the overall shape of the control handle 2 is strip-shaped.

[0280] The working portion 21 and the holding portion 22 adopt an integral structure or a detachable connection to facilitate storage with a smaller volume. The connection part between the working portion 21 and the holding portion 22 can adopt methods such as snap-fastening or threading for quick assembly.

[0281] In a preferred embodiment, the holding portion 22 is connected to the proximal end 212 of the working portion 21. And each pipe fitting passes through the control handle 2 from the distal end 211 of the working portion 21 and further extends towards the distal end.

[0282] In order to drive the relative movement of the pipe fittings hydraulically, in an embodiment of the present application, the connection method between the pipe fittings and the piston is further improved. The pipe fittings are directly inserted into the cylinder barrel, making the structure further compact and improving the integration degree.

[0283] Of course, as a hydraulic drive method, sealing treatment is required at the parts where each pipe fitting enters and exits the cylinder barrel 3. According to the movement relationship between the pipe fitting and the cylinder barrel 3, fixed sealing or sliding sealing is correspondingly adopted.

[0284] Each communication port is provided in the cylinder 3. The hydraulic drive circuit is used to drive the piston in the cylinder 3 to reciprocate. The necessary control devices such as pumps and valves can be provided on the hydraulic drive circuit as needed. In order to further improve the integration, in one embodiment, the hydraulic drive circuit is configured on the control handle 2 to drive the piston to make each pipe fitting move relative to each other. The interior of the first pipe fitting 11 can be used to pass a guide wire, etc., so the proximal end of the first pipe fitting 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 pipe fitting 11 extends and is connected to the pipe connector 113. The pipe connector 113 can specifically adopt a Luer connector and be connected to the first pipe fitting 11. Physiological saline can also be introduced into the first pipe fitting 11 through the pipe connector 113 as needed to implement the exhaust operation. The proximal end of the first pipe fitting 11 can be directly fixed to the pipe connector 113, or connected to the pipe connector 113 through a fastening sleeve. The fastening sleeve can be filled between the outer wall of the first pipe fitting 11 and the inner wall of the pipe connector 113 to achieve fastening and sealing.

[0285] There are many ways to arrange the matching relationship between the control handle 2 and the cylinder 3. For example, the control handle 2 forms a closed space to surround the cylinder 3; another example is the arrangement of the control handle 2 exposing a part of the cylinder 3; another example is the arrangement of the control handle 2 only used to provide positioning of the cylinder 3 and exposing the cylinder 3 in the circumferential direction of the cylinder 3; and so on.

[0286] Reference Figure 3a In the disclosed embodiment, the control handle 2 is provided with a shielding cover 27 for shielding at least a portion of the cylinder 3, and the shielding cover 27 is integrally or separately provided with the control handle 2. In the embodiment shown in the drawings, the shielding cover 27 is an independent component, and when the shielding cover 27 is installed on the control handle 2, the shielding cover 27 can be enclosed with the control handle 2 to achieve the closure of the outer dimensions of the control handle 2, thereby shielding the cylinder 3.

[0287] There are many ways to install the shielding cover 27 and the control handle 2, such as using buckles and fasteners. Figure 3fIn the disclosed embodiments, the shielding cover 27 is surrounded by snap-fastening with the control handle 2. The shielding cover 27 is arranged in the extending direction of the pipe fitting 1 and is provided with a first fitting part 271 cooperating with the control handle 2 in this direction. The first fitting part 271 is used to limit the movement of the shielding cover 27 in the radial direction of the pipe fitting 1. The cross-sectional shape of the shielding cover 27 itself is U-shaped, and the inside of the U-shape is used to accommodate the cylinder barrel 3. The first fitting part 271 is opened at the U-shaped opening. Two first fitting parts 271 are arranged opposite to each other at the U-shaped opening of the shielding cover 27. The two first fitting parts 271 have an assembly position close to each other and a disassembly position far from each other during the process of the change of the U-shaped opening amplitude of the shielding cover 27. The two first fitting parts 271 are kept in the assembly position under the action of the deformation elasticity of the material of the shielding cover 27 itself. At both ends of the shielding cover 27 in the extending direction of the pipe fitting 1, second fitting parts 272 are arranged, and the second fitting parts 272 cooperate with the control handle 2 to limit the movement of the shielding cover 27 in the extending direction of the pipe fitting 1. The first fitting part 271 and the second fitting part 272 are ribbed protrusions arranged on the inner surface of the shielding cover 27. The control handle 2 is provided with a first fitting groove 273 cooperating with the first fitting part 271. The control handle 2 is provided with a second fitting groove 274 cooperating with the second fitting part 272. The first fitting groove 273 and the second fitting groove 274 are not coplanar. Specifically, the planes where the first fitting groove 273 and the second fitting groove 274 are located are perpendicular to each other. In space, the first fitting groove 273 and the second fitting groove 274 are either communicated with each other or not communicated with each other.

[0288] In the extending direction of the pipe fitting 1, the length of the shielding cover 27 is greater than or equal to or less than the length of the cylinder barrel 3. Different length relationships actually correspond to the covering ability of the shielding cover 27 for the cylinder block. In addition to the dimensional change, the shielding cover 27 can also expose part of the cylinder barrel 3 in the form of partial hollowing. For example, in other embodiments, the shielding cover 27 can also be set as a semi-open structure. For example, the shielding cover 27 entirely shields the cylinder barrel 3, but has local openings for the cylinder barrel 3 to set joints. The shielding cover 27 is also provided with a dust-proof cap (not shown in the figure) corresponding to the corresponding interface. The dust-proof cap can be a structure integrated with the shielding cover or a separate component.

[0289] Reference Figure 3d In the shown embodiment, the first cylinder barrel 31 also has a communication port 314 and a communication port 315 connecting to the hydraulic drive circuit. A proximal sealing plug 36 is arranged at the proximal end of the second cylinder barrel 32, and the second cylinder barrel 32 also has a communication port 324 and a communication port 325 connecting to the hydraulic drive circuit. Each communication port is used to achieve the driving effect of the cylinder barrel for different pipelines, and the specific connection effect will be specifically explained below. As described in the background art, there are many components in the control handle, the cooperation relationship is complex, and there is a risk of failure.

[0290] Reference Figure 3g and Figure 3hIn the illustrated embodiment, an interventional device delivery system includes a plurality of pipe fittings coaxially arranged from the inside out, and a control handle 2 for driving the relative movement of the plurality of pipe fittings. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings are connected to the control handle 2, and the relative movement of the pipe fittings is driven by a hydraulic method at the control handle 2;

[0291] One or more cylinders are provided inside the control handle. Pistons are respectively slidably installed in each cylinder 3. Two pipe fittings adjacent in the radial direction include an outer pipe fitting and an inner pipe fitting. The outer pipe fitting enters the cylinder and is fixed to the piston in the cylinder, and the inner pipe fitting extends and is connected to the pistons of other cylinders or fixed to the control handle;

[0292] The cylinder is provided with a spare interface communicating with the inside of the cylinder. The spare interface has a standby state for closing the cylinder to maintain the internal pressure of the cylinder and an enabled state for opening the cylinder to connect to an external drive device.

[0293] Similar to the communication ports 314, 315, 324, and 325, multiple spare interfaces can also be provided. As shown in the reference drawings, the first cylinder 31 also has a spare interface 326 and a spare interface 327 for connecting to a hydraulic drive circuit. The second cylinder 32 also has a spare interface 328 and a spare interface 329 for connecting to a hydraulic drive circuit. The spare interface does not function when the cylinder and the hydraulic pipeline are working properly. Referring to the description of the shielding cover above, it can be stored in the operation handle. It can be used to connect to an external drive device in case of an accident. The external drive device is used to provide power for the movement of the cylinder. The external drive device can be a clinically common fluid pump delivery device such as a piston pump, a diaphragm pump, or an electromagnetic pump.

[0294] The number of spare interfaces can also be changed. For example, in the embodiment disclosed in the drawings, four spare interfaces are provided corresponding to the communication ports to ensure the full functions of the hydraulic pipeline under normal circumstances and improve stability.

[0295] For example, in another embodiment, a total of 3 spare interfaces are provided on the cylinder, and the spare interface for pushing the second sheath tube distally is omitted. The main reason for this setting is that the actual function of the omitted spare interface is to retrieve the interventional device. In the actual treatment process, retrieving the interventional device itself is a less frequent situation. Therefore, in some products, there is no need to provide a spare interface for this to avoid excessive redundancy.

[0296] In terms of the setting of the spare interface, in combination with the description of the shielding cover in the above text, the spare interface is arranged facing the shielding cover. This facilitates the shielding or opening of the spare interface by the shielding cover. The spare interfaces are arranged at intervals from each other. The spacing of the intervals can achieve the effective drive of the cylinder barrel. The positions of the spare interfaces and the communication ports correspond to each other. This setting can ensure that the spare interface can realize all the functions of the cylinder barrel under normal circumstances of the communication port.

[0297] To facilitate observing the working condition of the hydraulic system, the shielding cover 27 can be made of a transparent material. Of course, in the housing of the control handle 2, the parts of the first half shell 24 and the second half shell 25 corresponding to the area to be observed can also be made of a transparent material. For example, the parts corresponding to the control valve or the liquid storage tank.

[0298] Correspondingly, controllable valves are independently or linkedly arranged on the spare interfaces and the communication ports. When there is a problem with the pipeline, it can prevent the unreliable pressure relief of the fluid in the cylinder barrel and ensure the stable operation of the operating handle.

[0299] A first cylinder barrel 31 and a second cylinder barrel 32 are installed in the control handle 2. The two cylinder barrels respectively provide a first hydraulic chamber 311 and a second hydraulic chamber 321. A first piston 4 is slidably installed in the first hydraulic chamber 311, and a second piston 9 is slidably installed in the second hydraulic chamber 321. The first cylinder barrel 31 and the second cylinder barrel 32 are coaxially arranged and butt-jointed with each other, and a sealing member 34 is arranged at the butt-jointed part.

[0300] The proximal end of the second pipe fitting 12 penetrates into the first hydraulic chamber 311 and is fixedly connected to the first piston 4. The proximal end of the intermediate pipe fitting 13 extends out of the first piston 4 and then slidably seals through the sealing member 34 and enters the second hydraulic chamber 321, and the proximal end of the intermediate pipe fitting 13 is fixedly connected to the second piston 9 in the second hydraulic chamber 321. The proximal end of the first pipe fitting 11 extends out of the second piston 9 and is then fixedly connected to the control handle 2. The first piston 4 divides the first hydraulic chamber 311 into a first chamber 312 and a second chamber 313, and 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 the corresponding communication port.

[0301] The first chamber 312 and the second chamber 313 are divided according to the first piston 4, and the third chamber 322 and the fourth chamber 323 are divided according to the second piston 9. Since the positions of the two pistons can move, the volumes of each chamber also change accordingly and are not fixed.

[0302] When only the first piston 4 moves towards the distal end, it drives the second pipe fitting 12 to move towards the distal end, while the positions of the first pipe fitting 11 and the intermediate pipe fitting 13 remain unchanged. The same is true when the first piston 4 moves towards the proximal end.

[0303] When only the second piston 9 moves distally, it drives the intermediate pipe fitting 13 to move distally, while the positions of the first pipe fitting 11 and the second pipe fitting 12 remain unchanged. The same applies when the second piston 9 moves proximally.

[0304] The first cylinder barrel 31 and the second cylinder barrel 32 are coaxially arranged and are butt-jointed with each other through a partition seal 34. A distal seal plug 35 is provided at the distal end of the first cylinder barrel 31. The first cylinder barrel 31 also has communication ports 314 and 315 for connecting a hydraulic drive circuit, which are provided on both sides of the first piston 4. A proximal seal plug 36 is provided at the proximal end of the second cylinder barrel 32. The second cylinder barrel 32 also has communication ports 324 and 325 for connecting a hydraulic drive circuit, which are provided on both sides of the second piston 9.

[0305] The second pipe fitting 12 is slidably sealed through the distal seal plug 35 and is connected to the first piston 4. The intermediate pipe fitting 13 and the first pipe fitting 11 extend out of the first piston 4 inside the second pipe fitting 12. The intermediate pipe fitting 13 is further slidably sealed through the partition seal 34 and is connected to the second piston 9. The first pipe fitting 11 extends out of the second piston 9 inside the intermediate pipe fitting 13, and then is fixedly sealed through the proximal seal plug 36 and is connected to the pipeline joint 113 of the control handle 2.

[0306] Pistons are respectively arranged in each hydraulic chamber. Each piston can have the same structure in itself. Only the positions where they are located and the pipe fittings they pass through are different, but it does not affect their structural characteristics and working principles.

[0307] See Figure 4 , in an embodiment, two pipe fittings adjacent in the radial direction include an outer pipe fitting, i.e., the second pipe fitting 12, and an inner pipe fitting, i.e., the intermediate pipe fitting 13. The first piston 4 includes a support frame 41. Flanged edges that turn outwards are provided at both axial ends of the support frame 41. Sealing sleeves 42 are respectively fixedly provided on each flanged edge. According to the fitting relationship with the pipe fittings, the two sealing sleeves 42 respectively serve as: a fixed sealing part, which is sleeved on the second pipe fitting 12 and is fixedly sealed and fitted with the outer wall of the second pipe fitting 12;

[0308] a sliding sealing part, which is sleeved on the intermediate pipe fitting 13 and is slidably sealed and fitted with the outer wall of the intermediate pipe fitting 13;

[0309] The support frame 41 and each sealing sleeve 42 both have axial through holes 43 for the pipe fittings to pass through. The sealing sleeve 42 can be made of an elastic material such as rubber to facilitate sealing and fitting.

[0310] The fixed sealing portion and the sliding sealing portion are fixedly connected to each other relatively through the support frame 41, and the outer peripheries of both are in sliding sealing fit with the inner wall of the first cylinder 31. The first piston 4 is fixedly connected to the second pipe fitting 12 and is in sliding fit with the intermediate pipe fitting 13. Therefore, when the first piston 4 moves, it can drive the second pipe fitting 12, but does not affect the position of the intermediate pipe fitting 13. The same is true for the second piston 9. For example, in an embodiment, two pipe fittings adjacent in the radial direction include an outer layer pipe fitting, i.e., the intermediate pipe fitting 13, and an inner layer pipe fitting, i.e., the first pipe fitting 11. The second piston 9 has a through hole extending along the axis. The proximal end of the intermediate pipe fitting 13 is fixedly connected in the through hole, that is, the second piston 9 is fixedly connected to the intermediate pipe fitting 13 and is in sliding fit with the first pipe fitting 11. Therefore, when the second piston 9 moves, it can drive the intermediate pipe fitting 13, but does not affect the position of the first pipe fitting 11. The proximal end of the first pipe fitting 11 passes through the second hydraulic chamber and is fixedly communicated with the pipeline joint 113.

[0311] The radial gap between two pipe fittings adjacent in the radial direction is the exhaust gap. Each exhaust gap can be filled with normal saline for exhaust alone, or can be communicated to a unified hydraulic drive circuit to implement exhaust. The auxiliary function of hydraulic drive can be fully utilized, and exhaust is carried out by means of liquid perfusion, eliminating the need for additional exhaust equipment.

[0312] In order to establish a stable intervention channel, in an embodiment, a protective tube 14 is further sleeved outside the second pipe fitting 12, and the proximal end of the protective tube 14 is fixed to the control handle 2.

[0313] The protective tube 14 is fixedly installed relative to the control handle and is located outside the second pipe fitting 12. Implementing the intervention through the channel established by the protective tube 14 can avoid scratching the blood vessel when the second pipe fitting 12 reciprocates. The length of the protective tube 14, that is, the position of its distal end, can be determined according to the length of the intervention path. The proximal end of the protective tube 14 is fixed to the distal side of the control handle 2, and the proximal end of the second pipe fitting 12 passes through the protective tube 14 and then enters the first cylinder.

[0314] In order to facilitate the installation of the proximal end of the protective tube 14, in an embodiment, a fixing sleeve 8 is installed on the control handle. The proximal end of the protective tube 14 is hermetically docked with the distal end of the fixing sleeve 8, and the proximal end of the second pipe fitting 12 passes through the fixing sleeve 8 via the protective tube 14 and further extends into the first hydraulic chamber.

[0315] Since the protective tube 14 and the second pipe fitting 12 need to slide relative to each other, a radial gap is sometimes reserved, and it is necessary to exhaust the radial gap during the operation.

[0316] Combined Figure 5 - Figure 6d , Figure 3a - Figure 3e, in one embodiment, an interventional device delivery system is provided, which includes multiple pipe fittings coaxially arranged from inside to outside, and a control handle 2 for driving the relative movement of the multiple pipe fittings. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings are connected to the control handle 2. A cylinder 3 with a piston inside is configured at the control handle 2. The distal end of the cylinder 3 is hermetically docked with a fixed sleeve 8. The multiple pipe fittings pass through the fixed sleeve 8 and enter the cylinder 3 and are connected to the piston or fixed relative to the cylinder 3. The piston is driven hydraulically in the cylinder 3 to make the pipe fittings move relative to each other;

[0317] A protective tube 14 is sleeved on the outermost periphery of the multiple pipe fittings. The proximal end of the protective tube 14 is connected to the fixed sleeve 8. The radial gap between the outermost pipe fitting among the multiple pipe fittings and the protective tube 14 is an exhaust gap. An exhaust hole 82 communicating with the exhaust gap is provided on the side wall of the fixed sleeve 8.

[0318] The above embodiments can be combined. For example, the cylinder 3 includes a first cylinder 31 and a second cylinder 32 docked in sequence from the distal end to the proximal end. A first piston 4 is slidably installed in the first cylinder 31, and a second piston 9 is slidably installed in the second cylinder 32. The multiple pipe fittings include a first pipe fitting 11, an intermediate pipe fitting 13, and a second pipe fitting 12 coaxially arranged from inside to outside;

[0319] All the pipe fittings enter from the distal end of the first cylinder 31. The first pipe fitting 11 is fixed to the first piston 4. After the intermediate pipe fitting 13 extends out of the first piston 4, it enters the second cylinder 32 and is fixed to the second piston 9. After the first pipe fitting 11 extends out of the second piston 9, it is fixed to the proximal end of the second cylinder 32.

[0320] The fixed sleeve 8 has a through hole 81. The proximal end of the protective tube 14 extends into the through hole 81 and is hermetically and fixedly connected to the hole wall by means such as bonding, welding, and interference fit. The fixed sleeve 8 and the control handle 2 can be fixed by means such as clamping or using fasteners. In one embodiment, a circular positioning groove 83 is provided on the outer periphery of the fixed sleeve 8. The control handle 2 has two half shells that are buckled with each other. The edges of the two half shells are clamped with the positioning groove 83. For example, it can be seen in the figure that the corresponding part of the first half shell 24 is clamped into the positioning groove 83 to limit the axial position of the fixed sleeve 8.

[0321] Since the second pipe fitting 12 needs to slide reciprocally, the proximal end of the fixed sleeve 8 is in sliding seal cooperation with the outer wall of the second pipe fitting 12. The sliding seal cooperation here can be either that the inner wall of the through hole 81 is in direct contact with the outer wall of the second pipe fitting 12, or indirect cooperation through other components.

[0322] The protective tube 14 is fixedly inserted into one axial end of the fixing sleeve 8. The other axial end of the fixing sleeve 8 is a connecting end, which is inserted into the distal end of the first cylinder 31 and fixed to the first cylinder 31 by a buckle 87. A distal end seal plug 35 that mates with the inner wall of the first cylinder 31 is sleeved on the outer periphery of the connecting end.

[0323] An avoidance hole is formed in the distal end seal plug 35, and the outermost pipe fitting among the plurality of pipe fittings, i.e., the second pipe fitting 12, is in sliding and sealing fit with the avoidance hole.

[0324] In order to ensure the connection effect and facilitate assembly, in one embodiment, the connecting end has an outwardly turned edge 84, and the distal end seal plug 35 is sleeved on the outwardly turned edge 84. The distal end seal plug 35 is made of an elastic material such as rubber, which is convenient for installation on the one hand and can also ensure the sealing effect. As a preferred embodiment, at least two axially spaced convex rings 351 are provided on the outer periphery of the distal end seal plug 35, and the distal end seal plug 35 is in sealing fit with the inner wall of the first cylinder 31 through the respective convex rings 351.

[0325] In order to accurately assemble the axial relative position between the protective tube 14 and the fixing sleeve 8, in one embodiment, a blocking step 85 is provided on the inner wall of the fixing sleeve 8, and the proximal end face of the protective tube 14 abuts against the blocking step 85.

[0326] In order to accurately assemble the fixing sleeve 8 and the first cylinder 31, while being fixed to the first cylinder 31 by the buckle 87, in one embodiment, a positioning disc 86 is provided on the outer wall of the fixing sleeve 8, and the distal end face of the first cylinder 31 abuts against the positioning disc 86.

[0327] One side of the positioning disc 86 facing the inside of the first cylinder 31 is provided with a reinforcing rib 861. The reinforcing rib 861 can not only stabilize the positioning disc 86, but also abut against the inner wall of the first cylinder 31 after entering the first cylinder 31 to prevent the fixing sleeve 8 from radially shaking. In the circumferential direction of the fixing sleeve 8, the reinforcing rib 861 and the buckle 87 are alternately arranged at intervals. For example, two reinforcing ribs 861 and two buckles 87 are provided and are evenly alternately arranged in the circumferential direction.

[0328] After the buckle 87 and the first cylinder 31 are axially inserted into each other, accidental loosening can be prevented. Of course, in order to facilitate the assembly of the buckle 87 in place, in one embodiment, a positioning hole is provided on the side wall of the first cylinder 31. The buckle 87 includes an elastic arm 871 extending from the positioning disc 86 into the first cylinder 31, and a hook 872 located at the end of the elastic arm 871 and mating with the positioning hole.

[0329] At least two snap fasteners 87 are circumferentially distributed along the fixed sleeve 8, and are preferably evenly spaced. The axial end of the hook 872 has a slight chamfer. When inserted into the first cylinder 31, it can guide the elastic arm 871 to deform to allow each snap fastener 87 to enter the first cylinder 31 until the hook 872 is positioned in the positioning hole. At this time, the elastic arm 871 resets to lock the fixed sleeve 8 to the first cylinder 31.

[0330] During normal disassembly, tools are needed to radially push each snap fastener inward to disengage the hook 872 from the positioning hole and then pull it out axially. However, the operation is too cumbersome and requires tools. In a preferred embodiment, one side of the hook 872 in the circumferential direction has a chamfer structure 873 for guiding the hook 872 to rotate out of the positioning hole circumferentially.

[0331] When disassembly is required, the fixed sleeve 8 and the first cylinder 31 are rotated relative to each other. The chamfer structure 873 is radially inward under the action of the inner edge of the positioning hole, and then the hook 872 is squeezed out of the positioning hole. Then, the fixed sleeve 8 is pulled out axially, and the operation is more concise and does not require special tools.

[0332] In order to maintain the structural strength around the exhaust hole 82, in one embodiment, the side wall of the fixed sleeve 8 has a thickened area 88, and the exhaust hole 82 is opened in the thickened area 88.

[0333] Axially, the exhaust gap between the protective tube 14 and the first pipe fitting 11 is open at the proximal side of the protective tube 14. Therefore, the exhaust hole 82 is located between the blocking step 85 and the positioning disk 86.

[0334] The exhaust hole 82 can be separately connected to a pipeline for exhaust. In order to make full use of the existing hydraulic drive circuit, the exhaust hole 82 can be connected to the hydraulic drive circuit. For example, one of the working side interfaces of a multi-way switching valve is connected to the exhaust hole 82. The multi-way switching valve has multiple gears, and in one gear, the outlet of the drive pump is connected to the exhaust hole 82, so that exhaust can be carried out by means of liquid perfusion.

[0335] See Figure 7a - Figure 7e , in combination with Figure 3a - Figure 3e , this embodiment provides an interventional device delivery system, including a plurality of pipe fittings 1 coaxially arranged from the inside to the outside, and a control handle 2 for driving the relative movement of the plurality of pipe fittings 1. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings are connected to the control handle 2. A cylinder 3 with a piston inside is configured at the control handle 2. The plurality of pipe fittings 1 pass through the cylinder 3 and are connected to the piston or fixed relative to the cylinder 3, and the relative movement of the pipe fittings is driven hydraulically inside the cylinder 3;

[0336] The cylinder barrel 3 comprises a plurality of axially butted in sequence, and adjacent cylinder barrels are connected by a separation seal 34. One of the plurality of pipe fittings penetrates through the separation seal 34 in a sliding seal manner, and the separation seal 34 is detachably connected to the adjacent cylinder barrels by means of a buckle 345.

[0337] The relative movement of each pipe fitting is driven hydraulically. A cylinder barrel with a piston can be utilized and a hydraulic pipeline can be configured accordingly. Of course, the above embodiments can also be combined. In this embodiment, improvements are made to the connection of multiple cylinder barrels. The two ends of the separation seal 34 are respectively in sealing cooperation with each cylinder barrel, and are positioned axially and circumferentially on the cylinder barrel by means of buckles, so as to facilitate quick disassembly and assembly.

[0338] In one embodiment, the cylinder barrel comprises a first cylinder barrel 31 and a second cylinder barrel 32 axially butted in sequence. A first piston 4 is slidably installed in the first cylinder barrel 31, and a second piston 9 is slidably installed in the second cylinder barrel 32. The pipe fitting comprises a first pipe fitting 11, an intermediate pipe fitting 13 and a second pipe fitting 12 coaxially arranged from inside to outside.

[0339] All pipe fittings enter from the distal end of the first cylinder barrel 31. The first pipe fitting 11 is fixed to the first piston 4. After the intermediate pipe fitting 13 extends out of the first piston 4, it enters the second cylinder barrel 32 through the separation seal 34 and is fixed to the second piston 9. After the first pipe fitting 11 extends out of the second piston 9, it is fixed to the proximal end of the second cylinder barrel 32.

[0340] In one embodiment, the separation seal 34 comprises:

[0341] A cylinder body 341, the cylinder body 341 has an axis, and the two axial ends of the cylinder body 341 are respectively placed into the corresponding cylinder barrels on both sides.

[0342] Two sealing plugs 346, the two sealing plugs 346 are respectively fixed to one axial end of the cylinder body and are respectively in sealing cooperation with the inner wall of the corresponding cylinder barrel. Each sealing plug 346 is respectively provided with an avoidance hole for the pipe fitting to pass through.

[0343] Two groups of buckles 345, the two groups of buckles 345 are respectively fixed to one axial end of the cylinder body 341 and are respectively engaged with the corresponding cylinder barrels on both sides.

[0344] The distal end and the proximal end of the separation seal 34 adopt a symmetric structure, that is, the same structural features are used for connection with each cylinder barrel. Therefore, the following description mainly takes one side as an example, and the other side is the same by analogy.

[0345] The sealing plug 346 is made of an elastic material such as rubber to facilitate sealing. To facilitate the installation of the sealing plug 346, the axial ends of the cylinder body 341 are respectively provided with outward flanges 343, and each sealing plug 346 is fixedly sleeved on the corresponding outward flange 343. At least two axially spaced convex rings 3461 are provided on the outer periphery of the sealing plug 346, and the sealing cooperation with the inner wall of the corresponding cylinder barrel is achieved through each convex ring 3461. Each convex ring 3461 can form an independent seal to further ensure the sealing effect.

[0346] In order to maintain the stability of the relative position, in one embodiment, a positioning disk 342 is provided on the outer periphery of the cylinder body 341, and the end faces of two adjacent cylinder barrels respectively abut against two opposite sides of the positioning disk 342.

[0347] As can be seen in the figure, the first cylinder barrel 31 abuts against the distal side of the positioning disk 342, and the second cylinder barrel 32 abuts against the proximal side of the positioning disk 342. The positioning disk 342 not only positions and supports each cylinder barrel, but also makes the structure between the two cylinder barrels more compact.

[0348] Since the thickness of the positioning disk 342 is limited, in order to ensure the structural strength, in one embodiment, reinforcing ribs 344 are respectively provided between the outer periphery of the cylinder body 341 and two opposite sides of the positioning disk 342. The reinforcing ribs 344 can prevent the deformation of the positioning disk 342 in the axial direction and improve the overall stiffness of the positioning disk 342.

[0349] In a preferred embodiment, in the radial direction of the cylinder body 341, the outer edge of the reinforcing rib 344 abuts against the inner wall of the cylinder barrel where it is located. Through the support of the reinforcing rib 344, the two cylinder barrels can be further stabilized in the radial direction.

[0350] The reinforcing ribs 344 and the buckles 345 are alternately arranged at intervals. For example, on the same side of the positioning disk 342, two reinforcing ribs 344 and two buckles 345 are respectively provided and are evenly arranged alternately in the circumferential direction.

[0351] After the buckles 345 are axially inserted into the corresponding cylinder barrels, accidental loosening can be prevented. Of course, for the convenience of assembly, that is, for the buckles 345 to be easily positioned, in one embodiment, positioning holes are provided on the barrel walls of each cylinder barrel, two groups of buckles are fixed on two opposite sides of the positioning disk 342, and each buckle includes an elastic arm 3451 extending from the positioning disk 342 into the cylinder barrel, and a hook 3452 located at the end of the elastic arm 3451 and cooperating with the positioning hole.

[0352] The end of the hook 3452 is provided with a guiding inclined surface 3453 for guiding itself to enter the positioning hole along the axial direction of the cylinder body. When inserting into the cylinder barrel, the elastic arm 3451 can be guided to deform to allow each buckle 345 to enter the corresponding cylinder barrel until the hook 3452 is positioned in the positioning hole. At this time, the elastic arm 3451 resets, locking the isolation seal 34 to the connected cylinder barrel.

[0353] During normal disassembly, tools are required to radially push each snap fastener inward to disengage the catch 3452 from the positioning hole and then pull it out axially. However, the operation is too cumbersome. In a preferred embodiment, one side of the catch 3452 in the circumferential direction is provided with a chamfer structure 3454 for guiding the catch 3452 to rotate out of the positioning hole circumferentially.

[0354] When disassembly is required, the isolation seal 34 and the cylinder barrel are rotated relative to each other. The chamfer structure 3454 radially squeezes the catch 3452 inward under the action of the inner edge of the positioning hole to disengage the catch 3452 from the positioning hole, and then the isolation seal 34 and the cylinder barrel are axially pulled apart. The operation is more concise and does not require the use of special tools.

[0355] See Figure 8a - Figure 8d , in one embodiment, a pipeline joint 113 is provided. For example, a positioning hole is formed in the proximal barrel wall of the second cylinder barrel 32. The outer periphery of the pipeline joint 113 is provided with a positioning disk 1131. The end face of the second cylinder barrel 32 abuts against the positioning disk 1131. The positioning disk 1131 is also provided with a catch 1132 extending into the second cylinder barrel 32 and mating with the positioning hole. One side of the catch 1132 in the circumferential direction is provided with a chamfer structure for guiding the catch 1132 to enter and exit the positioning hole of the second cylinder barrel 32.

[0356] The distal end of the pipeline joint 113 is provided with a flanged edge. The proximal sealing plug 36 is sleeved on the flanged edge. The outer periphery of the proximal sealing plug 36 is provided with two convex rings 361 and is hermetically mated with the inner wall of the second cylinder barrel 32 through the two convex rings 361.

[0357] The proximal part of the pipeline joint 113 is provided with a quick-connect structure in the form of a thread or other means for facilitating connection to an external pipeline. The distal part of the pipeline joint 113 is relatively fixed to the first pipe fitting 11 and is in communication with each other.

[0358] The proximal sealing plug 36 is provided with an avoidance hole. The proximal end of the first pipe fitting 11 can extend into and be fixed in the avoidance hole, or further extend and be fixed to the inner wall of the pipeline joint 113.

[0359] See Figure 3a - Figure 3e , in one embodiment of the present application, in order to further improve the integration degree, a hydraulic drive circuit for driving the relative movement of each pipe fitting through a piston is further configured at the control handle 2. Installing the hydraulic drive circuit on the control handle 2 can avoid using long external pipelines and reduce component interference during hand-held mobile operation.

[0360] In one embodiment, the hydraulic drive circuit includes:

[0361] A hydraulic pipeline for providing a liquid passage communicating with each hydraulic chamber;

[0362] A drive pump 5 connected to the hydraulic pipeline for driving the liquid to flow;

[0363] Control valve, connected to a hydraulic pipeline to control the flow direction of the liquid.

[0364] The hydraulic pipeline generally refers to the pipeline used to connect the components in the hydraulic drive circuit. Since the hydraulic drive circuit is configured inside the control handle 2, it is preferably that all or most of the hydraulic pipelines are accommodated inside the control handle 2. In the drawings related to the specific structure in this application, the hydraulic pipelines are omitted. Since the connection relationship of each component has been clearly described, the hydraulic pipelines can be arranged as needed during the implementation process. Since the hydraulic pipelines generally use hoses, how to accommodate them inside the control handle 2 can be implemented as needed.

[0365] When in use, the hydraulic pipeline is filled with liquid, and the reciprocating movement of the piston is changed by the flow direction of the liquid. To improve safety, the liquid in the hydraulic drive circuit is physiological saline.

[0366] By arranging corresponding control valves in the hydraulic drive circuit, the flow direction of the liquid can be controlled, the movement direction of the piston can be changed, or other auxiliary functions can be realized. For example, the control valve can include check valves respectively arranged at the outlet and inlet of the drive pump 5, and a multi-way switching valve 6 for switching the movement direction of the piston.

[0367] See Figure 9a - Figure 9c , in order to buffer and temporarily store the liquid, in one embodiment, the hydraulic drive circuit further includes a liquid storage tank 7 connected to the hydraulic pipeline for temporarily storing the liquid. The liquid storage tank 7 can also be integrally installed inside the control handle 2. In order to pre-fill or fill the liquid on-site during use, the liquid storage tank 7 is provided with a liquid filling port 71.

[0368] The liquid storage tank 7 not only has inlets and outlets connected to the hydraulic pipeline, but also can be separately provided with a liquid filling port 71. A valve can be separately provided at the liquid filling port 71 for connecting an external liquid filling device. In addition, in a preferred embodiment, the liquid filling can also be realized by using the drive pump 5.

[0369] Combined with Figure 3a - Figure 3e , in one embodiment, an interventional device delivery system is provided, including a plurality of pipe fittings 1 coaxially arranged from the inside to the outside, and a control handle 2 for driving the relative movement of the plurality of pipe fittings 1. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings are connected to the control handle 2. A hydraulic drive circuit for driving the relative movement of the pipe fittings is also configured at the control handle 2;

[0370] The hydraulic drive circuit at least includes a liquid storage tank 7, and the liquid storage tank 7 includes:

[0371] A tank body 75, with a tank opening and an inlet 73 and an outlet 74 connected to the hydraulic drive circuit;

[0372] A buffer bladder 77, the buffer bladder 77 is placed in the tank body 75 and is sealingly fitted with the tank opening;

[0373] The gland 76 is buckled with the tank body 75 and clamps and fixes the buffer bag 77 with the tank opening.

[0374] In the hydraulic drive circuit, in order to store liquid and serve as a buffer for sudden changes in liquid flow pressure, a liquid storage tank 7 can be configured, where the tank body 75 is connected to the inlet side of the drive pump 5 in the hydraulic drive circuit. When the internal liquid volume of the tank body 75 changes, the pressure can be released through the deformation of the buffer bag 77.

[0375] In order to facilitate the replenishment of body fluid from the outside, in one embodiment, the bottom wall of the tank body 75 is on the side away from the tank opening, a liquid injection port 71 is opened on the bottom wall, and a pipeline joint is installed at the liquid injection port 71.

[0376] The pipeline joint can be provided with a connection structure such as a thread that is convenient for disassembly and assembly. The tank body 75 is installed inside the control handle 2, and only the pipeline joint is exposed outside the control handle 2. In order to avoid interfering with the deformation of the buffer bag 77, both the inlet 73 and the outlet 74 of the tank body 75 are adjacent to the bottom wall.

[0377] The tank body 75 includes a first tank body 75a and a second tank body 75b that are interconnected, and a buffer bag 77 is provided inside the first tank body 75a.

[0378] The volume of the first tank body 75a is larger than that of the second tank body 75b. The top of the first tank body 75a has a tank opening, and the bottom shape of the first tank body 75a converges and transitions to the second tank body 75b.

[0379] The larger volume of the first tank body 75a is convenient for configuring a buffer bag 77 with a corresponding volume, improving the buffer adaptation ability. The bottom shape of the first tank body 75a converges to form a stepped structure. When the buffer bag 77 expands to the maximum volume, the bottom of the buffer bag 77 can abut against the stepped structure, playing an auxiliary phase role and avoiding overly occupying the space of the second tank body 75b.

[0380] The buffer bag 77 is made of an elastic material and changes the internal volume of the tank body 75 through its own deformation. As a preferred embodiment, the wall of the buffer bag 77 is provided with a corrugated structure that can be stretched and deformed. The stretching or compression of the corrugated structure can guide the volume change trend of the buffer bag 77 and further increase the variable volume range.

[0381] In order to avoid the obstruction of the increase in internal pressure when the volume of the buffer bag 77 decreases, in one embodiment, the side of the buffer bag 77 facing the tank opening is an open structure, and the opening part is provided with an outward-turned edge 771, and the outward-turned edge 771 is clamped and fixed by the gland 76 and the tank opening. When the volume of the buffer bag 77 decreases, the internal air can be discharged from the opening part, making the corrugated structure flat and folded.

[0382] In one embodiment, to ensure the sealing effect, the turned-out edge 771 has an annular protrusion 772 that abuts against the gland 76. The annular protrusion 772 can be regarded as a thickened area and has a larger deformation range. When the gland 76 abuts against the annular protrusion 772, the deformation of the annular protrusion 772 can compensate for local shape defects or machining errors to ensure the sealing performance. Of course, a groove can be formed in the corresponding part of the gland 76 to accommodate the annular protrusion 772, which is more convenient for positioning and assembly. The depth of the groove is slightly smaller than that of the annular protrusion 772.

[0383] A closed space for storing liquid has been formed between the buffer bladder 77 and the tank body 75. Therefore, the main function of the gland 76 is to fix the buffer bladder 77. In one embodiment, the gland 76 includes:

[0384] An annular frame that clamps and fixes the buffer bladder 77 to the tank opening;

[0385] An elastic hook 761 that extends from the annular frame toward the tank body 75 and cooperates with the tank body 75.

[0386] To cooperate with the annular frame, the tank opening is turned out to form an interface platform 751. The annular frame clamps and fixes the buffer bladder 77 to the top surface of the interface platform 751, and the elastic hook 761 abuts against the bottom surface of the interface platform.

[0387] The annular frame and the interface platform 751 are generally in a shape that matches. The elastic hooks 761 are generally arranged in pairs to maintain balanced force application. The elastic hooks 761 have a guiding inclined surface that acts on the interface platform 751 to facilitate positioning during installation. To ensure the sealing effect, a flange 752 that abuts against the buffer bladder 77 is annularly arranged on the top surface of the interface platform 751.

[0388] See Figure 10 , in one embodiment, the driving pump 5 includes:

[0389] A pump housing 51 fixed to the control handle and connected to the hydraulic drive circuit;

[0390] A working member 52 that is movably installed in the pump housing 51 and used to drive the liquid to flow;

[0391] A driving member 53 that is movably installed on the control handle and linked with the working member 52;

[0392] A return spring 56 acting between the control handle and the driving member 53.

[0393] The interior of the pump housing 51 is used to form a pump chamber 57. The pump housing 51 is provided with an inlet 54 and an outlet 55 that communicate with the pump chamber 57, and the inlet 54 and the outlet 55 are connected to the hydraulic drive circuit.

[0394] The control handle can also be installed with a spare joint 72 for temporarily transferring liquid or replacing other components.

[0395] The working part 52 makes a linear reciprocating motion or a circular motion within the pump housing 51 to drive the liquid to flow. Common forms can adopt the form of an impeller or a plunger. In one embodiment, the working part 52 is a plunger, and the driving part 53 directly presses against the plunger or is linked with the plunger through a transmission mechanism.

[0396] The driving part 53 is an electric part, a pneumatic part or a manual part. The function of the driving part 53 is to drive the working part 52 to move. The driving part 53 and the working part 52 can be integrally structured or separately linked. According to the form of the power source and for the purpose of simplifying the structure, a manual part is preferably adopted, that is, the working part 52 is driven through manual operation. Of course, the basic functions can also be achieved by using electricity or pneumatic power.

[0397] In one embodiment, the manual part is an operating button slidably or rotatably mounted on the control handle.

[0398] In one embodiment, the driving part 53 has a shaft hole 531 and is mounted on the control handle through a rotating shaft. The control handle includes a working part for providing a hydraulic cavity and a holding part 22 connected to the working part. The operating button is mounted on the holding part 22. This is to facilitate single-handed operation of the driving pump 5 while holding it.

[0399] In one embodiment, the driving pump 5 further includes a reset part acting between the operating button and the control handle. The driving part 53 and the working part 52 can be in abutting cooperation, or can be connected through a limiting structure or a traction part, so that the working part 52 reciprocates simultaneously when the driving part 53 is reset. A reset part can be provided between the driving part 53 and the control handle, such as a compression spring or a tension spring acting on the driving part 53, or a torsion spring mounted at the rotating shaft part, such as the reset spring 56. In order to make the working part 52 reciprocate, the reset part can also directly act on the working part 52, such as a compression spring directly abutting against the working part 52 within the pump chamber 57. During use, the driving part 53 is repeatedly pressed, and then the working part 52 is driven to make the liquid flow in the hydraulic drive circuit.

[0400] See Figure 11a - Figure 1 1f, Figure 12a - 12d , in one embodiment, the control valve adopts a multi-way switching valve 6. The multi-way switching valve 6 has a driving-side interface 67 connected to the outlet and inlet of the driving pump 5, and a plurality of working-side interfaces 68. Every two working-side interfaces are connected to one hydraulic cavity. The multi-way switching valve 6 has a plurality of gears and is used to switch the connection relationship between the driving-side interface and different working-side interfaces to control the liquid flow direction.

[0401] The multi-way switching valve 6 can switch the connection relationship between each hydraulic cavity and the outlet and inlet of the driving pump 5 through different gears, that is, the change of the piston movement direction can be realized. One-way valves can be configured as needed to avoid unnecessary backflow of the liquid at the driving pump 5 and ensure the liquid delivery efficiency.

[0402] The drive-side interface and the working-side interface are only distinguished according to different connecting components. For the multi-way switching valve 6 itself, they are just multiple different interfaces.

[0403] In one embodiment, the multi-way switching valve 6 includes a valve seat 61 and a valve core 62 that cooperate with each other. The valve seat 61 has a valve cavity inside, and a plurality of interfaces 65 are provided on the side wall of the valve cavity for connecting the drive pump and each hydraulic cavity. The valve core 62 is placed in the valve cavity and is rotationally fitted. A plurality of flow channels 66 are provided on the outer peripheral wall of the valve core 62. When the valve core 62 rotates to different positions, there are corresponding connection relationships between the plurality of flow channels 66 and the plurality of interfaces 65. For the sake of easy identification, in one embodiment, the multi-way switching valve 6 is embedded in the control handle 2, and a mark 64 indicating the gear position of the multi-way switching valve 6 is provided on the control handle 2.

[0404] The valve core 62 is connected with a wrench 63. When the wrench rotates to different angles, it points to the marks 64 of different gears. In this embodiment, for the sake of matching the functions of different gears, seven flow channels 66 (indicated by the arrows in the figure) are provided. Of course, the number of flow channels 66 can also be increased or decreased accordingly according to the functions to be achieved.

[0405] In one embodiment, the control valve further includes:

[0406] Two one-way valves. The outlet of the drive pump 5 is connected to the liquid storage tank 7 through the first one-way valve; the drive-side interface of the multi-way switching valve is connected to the inlet of the drive pump 5 through the second one-way valve.

[0407] To further indicate the operation, the multi-way switching valve 6 is embedded in the control handle 2, and a mark indicating the gear position of the multi-way switching valve 6 is provided on the control handle 2.

[0408] See Figure 3a , Figure 3b , although the shape of the control handle 2 is not strictly limited, for the sake of easy operation, in some embodiments, the control handle 2 includes a working part 21 and a holding part 22 connected to the working part 21. The cylinder barrel 3 is located inside the working part 21, that is, the working part 21 as a whole is used to provide the hydraulic cavity. The working part 21 also has a relative distal end 211 and a proximal end 212, and their relative orientation expressions are similar to those of other components.

[0409] The shape of the holding part 22 is convenient for holding and operating. For example, it has a length direction as a whole. Since the cylinder barrel is installed in the working part 21, taking the movement direction of the piston in the cylinder barrel as the axial direction of the cylinder barrel, the length direction of the holding part 22 is substantially perpendicular to the axial direction of the cylinder barrel, or slightly obliquely intersects. In terms of the two parts of the working part 21 and the holding part 22, the overall shape is L-shaped or T-shaped. To further improve the holding feel and conform to the shape characteristics of the hand, the overall shape of the control handle 2 is similar to the shape of a pistol. In the hydraulic drive circuit, some control components that need to be operated in real time, such as switches, etc., can be arranged on the holding part 22 for easy single-handed operation.

[0410] To facilitate single - hand operation, in one embodiment of the present application, an interventional device delivery system is provided, which includes multiple pipe fittings coaxially arranged from the inside to the outside, and a control handle 2 for driving the relative movement of the multiple pipe fittings. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings are connected to the control handle 2. A hydraulic drive circuit for driving the relative movement of the pipe fittings is configured at the control handle 2. The hydraulic drive circuit includes at least one drive pump 5 for driving the flow of liquid and a control valve for controlling the liquid flow direction.

[0411] The control handle 2 has a holding portion 22. The operating component of the drive pump 5 is arranged at the holding portion 22, and the operating component of the control valve is adjacent to the holding portion 22.

[0412] To make the hydraulic drive circuit work, a relatively simple and direct way is to use manual operation. During the operation process, the components that generally need to be frequently operated are the drive pump 5 and the control valve. The operating components of both are arranged at the holding portion 22 or adjacent to the holding portion 22, which is convenient for single - hand holding and corresponding operations, and also convenient for the other hand to operate or support other devices.

[0413] See Figure 3a , Figure 3b , Figure 12a - Figure 12e , in one embodiment, the control valve uses a multi - way switching valve 6. The interventional device delivery system in this embodiment includes multiple pipe fittings coaxially arranged from the inside to the outside, and a control handle 2 for driving the relative movement of the multiple pipe fittings. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings are connected to the control handle 2. A hydraulic drive circuit for driving the relative movement of the pipe fittings is further configured at the control handle 2. The hydraulic drive circuit includes a multi - way switching valve 6 for switching the liquid flow direction. The multi - way switching valve 6 includes:

[0414] Two relatively arranged valve seats. One valve seat is provided with an interface 67 for accessing the driving side of the hydraulic drive circuit, and the other valve seat is provided with an interface 68 for accessing the working side of the hydraulic drive circuit.

[0415] A valve core 62 that is sealed and clamped by the two valve seats and rotatably installed. The valve core 62 has a communication hole 624. When the valve core 62 rotates to different angles, the communication hole 624 connects the corresponding driving - side interface 67 and working - side interface 68.

[0416] A wrench 63 linked to the valve core 62 for changing the rotation angle of the valve core 62.

[0417] See Figure 3a , Figure 3b , Figure 12a - Figure 12e, in order to make it more convenient for single - hand operation and mode switching (i.e., gear shifting), in one embodiment, an interventional device delivery system is provided, which includes multiple pipe fittings coaxially arranged from inside to outside, and a control handle 2 for driving the relative movement of the multiple pipe fittings. The distal ends of the pipe fittings are used to cooperate with each other to operate the interventional device, and the proximal ends of the pipe fittings are connected to the control handle 2. A hydraulic drive circuit for driving the relative movement of the pipe fittings is also configured at the control handle 2; the hydraulic drive circuit includes a multi - way switching valve 6 for switching the liquid flow direction. The multi - way switching valve 6 includes:

[0418] Two relatively arranged valve seats. One of the valve seats is provided with a drive - side interface 67 for accessing the hydraulic drive circuit, and the other valve seat is provided with a working - side interface 68 for accessing the hydraulic drive circuit;

[0419] A valve core 62 that is rotationally installed and sealed and fastened by the two valve seats. The valve core 62 is provided with a communication hole 624. When the valve core 62 rotates to different angles, the communication hole 624 connects the corresponding drive - side interface 67 and working - side interface 68;

[0420] A wrench 63 that is linked to the valve core 62 through a one - way clutch mechanism to change the rotation angle of the valve core 62;

[0421] A wrench return spring 69 acting between the wrench 63 and at least one valve seat.

[0422] In this embodiment, the wrench 63 and the valve core 62 are driven by a one - way clutch mechanism, that is, the switching of each gear is achieved by the one - way rotation of the valve core 62, rather than reciprocating bidirectional rotation. It is more conducive to a single finger pressing the wrench, which conforms to the physiological structure characteristics of the operator's finger. In the hydraulic drive circuit, the power for liquid flow can adopt existing technologies or be combined with the drive pump 5 in other embodiments.

[0423] Combined Figure 3a - Figure 3e , in one embodiment, the control handle 2 includes a working part 21 and a holding part 22 connected to the working part 21. A cylinder 3 with a piston inside is configured in the working part 21. Multiple pipe fittings pass through the cylinder 3 and are connected to the piston or fixed relative to the cylinder 3, and the relative movement of the pipe fittings is driven hydraulically inside the cylinder 3;

[0424] The cylinder 3 is respectively communicated with the corresponding working - side interfaces 68 on both sides of the piston. The hydraulic drive circuit also includes a drive pump 5 connected to each drive - side interface 67 for driving the liquid to flow.

[0425] In one embodiment, the cylinder 3 includes a first cylinder 31 and a second cylinder 32 axially butted in sequence. A first piston 4 is slidably installed in the first cylinder 31, and a second piston 9 is slidably installed in the second cylinder 32. The pipe fittings include a first pipe fitting 11, an intermediate pipe fitting 13, and a second pipe fitting 12 coaxially arranged from inside to outside;

[0426] All pipe fittings enter from the distal end of the first cylinder barrel 31. Among them, the first pipe fitting 11 is fixed to the first piston 4. After the intermediate pipe fitting 13 extends out of the first piston 4, it enters the second cylinder barrel 32 via the isolation seal 34 and is fixed to the second piston 9. After the first pipe fitting 11 extends out of the second piston 9, it is fixed to the proximal end of the second cylinder barrel 32.

[0427] Combined with Figure 10 , in an embodiment, the driving pump 5 includes:

[0428] A pump housing 51 fixed within the control handle 2 and connected to the hydraulic driving circuit;

[0429] A working member 52 movably installed within the pump housing 51 for driving the flow of liquid;

[0430] A driving member 53 movably installed on the holding portion 22 and linked with the working member 52;

[0431] A return spring 56 acting between the control handle 2 and the driving member 53.

[0432] The outlet 55 and the inlet 54 of the driving pump 5 are both opened on the pump housing 51. The driving side interfaces 67 of the multi-way switching valve 6 have two, which are respectively connected to the outlet 55 and the inlet 54 of the driving pump 5. It is also possible to configure necessary one-way valves and a liquid storage tank 7 connected between the inlet 54 and the corresponding driving side interface 67 in combination with the foregoing related embodiments.

[0433] The positional relationship among the wrench 63, the holding portion 22, and the working portion 21 also has a certain influence on the convenience of operation. In an embodiment, the wrench 63 and the holding portion 22 are on the same side in the radial direction of the working portion 21. During operation, generally the wrench 63 and the holding portion 22 are closer to the operator, while the working portion is relatively farther from the operator.

[0434] In a preferred embodiment, the wrench 63 is located on the proximal side of the holding portion 22, and the driving member 53 faces the wrench 63. During operation, it can be in a manner similar to that of a pistol. The index finger pulls the wrench 63, and the other four fingers grip the holding portion 22 and can simultaneously press the driving member 53 to drive the driving pump 5. When shifting gears, just pull the wrench 63. The holding of the control handle 2 and the control of the hydraulic driving circuit can be completed with one hand, greatly liberating human power and eliminating the inconvenience of multi-person cooperation operation.

[0435] To prevent slipping during holding, an anti-slip blocking member 28 is also provided at the end of the holding portion 22 (i.e., the end far from the working portion 21). The anti-slip blocking member 28 can extend distally and straddle other parts of the housing of the control handle 2. The anti-slip blocking member 28 is strip-shaped and extends along a smooth curve, which can further improve the hand feeling.

[0436] In order to cooperate with the operation of the wrench 63 and improve the stability of holding, in one embodiment, the anti-drop blocking member 28 surrounds the wrench 63. That is, the wrench 63 is in a closed area.

[0437] The valve core 62 and the wrench 63 can be separated and linked, or can be an integrated structure. The end of the wrench 63 is hook-shaped, which is convenient for hooking operation.

[0438] Figure 12a - Figure 12e In the relevant embodiment, the multi-way switching valve 6 has multiple gears for switching the connection relationship between the driving side interface 67 and different working side interfaces 68 to control the flow direction of the liquid. The valve seat 61 is fastened in two parts, and the valve core 62 rotates between the two parts. When it rotates to different angles, it corresponds to different gears. Other details or improvements of the multi-way switching valve 6 will be further described below.

[0439] Since the valve core 62 and the valve seat 61 are rotatably matched, it is necessary to ensure that they are sealed with each other. When there is sufficient processing accuracy, they can be tightly attached to each other. However, this undoubtedly puts forward more stringent requirements on materials and processes. In order to reduce the process requirements and facilitate processing, in one embodiment, each valve seat is provided with a mounting groove on the side facing the valve core 62, and a sealing gasket is fixedly embedded in the mounting groove, and is sealed against the valve core 62 through the sealing gasket.

[0440] In one embodiment, the sealing gasket is positioned in such a way that mutually engaging positioning teeth are provided between the inner periphery of the installation groove and the outer periphery of the sealing gasket. Of course, other fixing methods can also be used for positioning. In this embodiment, the positioning teeth are used to eliminate other positioning components and glue bonding is not required. When assembling, the sealing gasket can be pressed into the installation groove in an aligned manner, which is convenient to operate.

[0441] The mutually engaged positioning teeth can prevent the sealing gasket from rotating with the valve core 62. For example, the inner periphery of the installation groove of the first valve seat 61a in the figure is provided with a second positioning tooth 614, and the outer periphery of the first sealing gasket 611 in the installation groove is provided with a first positioning tooth 6111 that meshes with the second positioning tooth 614. Similarly, the inner periphery of the installation groove of the second valve seat 61b in the figure is provided with a third positioning tooth 615, and the outer periphery of the second sealing gasket 617 in the installation groove is provided with a fourth positioning tooth 6171 that meshes with the third positioning tooth 615.

[0442] The sealing gasket can be made of elastic materials such as rubber to maintain the necessary seal. In addition, the valve seat or other parts can also be made of transparent materials to facilitate observation and verification of the position during assembly, as well as visual operation during use.

[0443] Of the two valve seats, one valve seat is a first valve seat 61a provided with a driving side interface 67, and the other valve seat is a second valve seat 61b provided with a working side interface 68;

[0444] On the side facing the valve core, the first valve seat 61a is provided with a liquid inlet hole 613 communicating with the driving side interface 67. On the first sealing gasket 611 embedded in the first valve seat 61a, there is a first liquid passing hole 6112 corresponding to the position of the liquid inlet hole 613 and communicating with each other.

[0445] On the side facing the valve core, the second valve seat 61b is provided with a liquid outlet hole 616 communicating with the working side interface 68. On the second sealing gasket 617 embedded in the second valve seat 61b, there is a second liquid passing hole 6172 corresponding to the position of the liquid outlet hole 616 and communicating with each other.

[0446] When the valve core rotates to different angles, the communication holes 624 on the valve core will communicate the corresponding first liquid passing holes 6112 and second liquid passing holes 6172.

[0447] There are two driving side interfaces 67 on the first valve seat 61a, which are respectively connected to the outlet and inlet of the driving pump 5. Correspondingly, there are also two liquid inlet holes 613 and communication holes 624 configured in one-to-one correspondence. A cap 618 can also be provided on the side of the first valve seat 61a facing away from the other valve seat.

[0448] The working side interfaces 68 on the second valve seat 61b are configured according to the number of gears. For example, in the related drawings of this embodiment, there are four working side interfaces 68, and there are also four liquid outlet holes 616 configured in one-to-one correspondence. In order to facilitate gear shifting, there are multiple second liquid passing holes 6172 on the second sealing gasket 617. For example, there are eight in this embodiment. Every two second liquid passing holes 6172 communicate with one liquid outlet hole 616. When the valve core 62 rotates to different angles, two communication holes 624 correspond to two second liquid passing holes 6172 at the corresponding positions, and the two second liquid passing holes 6172 at this position are exactly communicated with the corresponding two liquid outlet holes 616. In order to adapt to the distribution of the second liquid passing holes 6172, each liquid outlet hole 616 extends into a strip shape, that is, the same liquid outlet hole 616 can communicate with multiple second liquid passing holes 6172 to ensure the position change of the two communication holes 624 on the premise that the position of the second sealing gasket 617 remains unchanged.

[0449] There are two liquid inlet holes 613. Relative to the rotation axis of the valve core, each liquid inlet hole 613 is at a different radial position; the first liquid passing hole 6112 is matched with the position of the corresponding liquid inlet hole 613;

[0450] On the side of the valve core 62 facing the first valve seat 61a, there are two inner and outer annular grooves 623. Each annular groove 623 communicates with one of the liquid inlet holes 613, and there are two communication holes 624 respectively communicating with one of the annular grooves 623.

[0451] No matter what angle the valve core 62 rotates to, the two inner and outer annular grooves 623 can ensure communication with the liquid inlet holes 613 corresponding to the radial positions.

[0452] The valve core 62 is rotatably installed between two valve seats through a rotating shaft 621. The valve core 62 and the wrench 63 are linked through a one-way clutch mechanism, that is, the wrench 63 can only drive the valve core 62 to rotate in one direction (circumferentially). After the wrench 63 moves in place, the wrench return member 69 drives the wrench 63 to return, while the valve core 62 remains stationary. Repeating this cycle can drive the valve core 62 to switch to each gear.

[0453] In one embodiment, the wrench 63 includes an annular sleeve 631 located on the outer periphery of the valve core 62, and a hook portion 633 fixed to the annular sleeve 631 and extending to the outside of the control handle 2; the inner edge of the annular sleeve 631 and the outer periphery of the valve core 62 are linked through a mutually cooperating one-way clutch mechanism.

[0454] The hook portion 633 is used for finger-pulling operation, preferably in a hook shape and located on the proximal side of the holding portion 22. There are positioning columns that are inserted into each other between the two valve seats and are fixed by fasteners. In order to limit the limit angle of each rotation of the wrench 63, a corresponding blocking member can be provided on the valve seat 61, or a limiting strip hole is enclosed between the two valve seats, and the hook portion 633 moves in the limiting strip hole, and the length of the limiting strip hole limits the movement stroke of the hook portion 633.

[0455] The one-way clutch mechanism includes:

[0456] Ratchet teeth 622 distributed around the outer periphery of the valve core 62;

[0457] Elastic claws 632 fixed to the inner periphery of the annular sleeve 631;

[0458] The wrench 63 has relative forward and reverse directions with respect to the rotation direction of the valve core 62. When rotating forward, the elastic claws 632 engage with the ratchet teeth 622 to drive the valve core 62. When rotating in reverse, the elastic claws 632 deform and slip off from the ratchet teeth 622, and the wrench return member 69 drives the wrench 63 to rotate in reverse.

[0459] The tooth surface of the ratchet teeth 622 has a specific orientation. One side can engage and link with the elastic claws 632, and the other side can cause the elastic claws 632 to slip off. The elastic claws 632 extend substantially circumferentially, allowing the elastic claws 632 to radially inwardly retract under the pressure of the ratchet teeth 622 and then slip off when the valve core 62 rotates in reverse. After that, they radially expand and reset under their own elasticity. At this time, if the valve core 62 rotates forward, it will engage with the previously slipped ratchet teeth 622 again and link.

[0460] In order to better cooperate with the ratchet teeth 622, in one embodiment, the elastic claws 632 extend along the circumferential direction of the annular sleeve 631 and bend inward. 2 to 4 elastic claws 632 are evenly distributed at intervals along the circumferential direction of the annular sleeve 631.

[0461] The wrench reset member 69 is a coil spring extending around the valve core axis, one end of the coil spring is connected to the valve seat 61 , and the other end is connected to the annular sleeve 631 .

[0462] When the wrench 63 drives the valve core 62 to rotate forward, the elastic force of the coil spring is overcome, causing the coil spring to store energy. When the wrench 63 is released, the coil spring drives the wrench to rotate in the opposite direction and reset. In order to balance the force, in one embodiment, the coil spring is two circles arranged side by side. In the axial direction of the valve core 62, each circle of the coil spring is respectively located on both sides of the annular sleeve 631, and one end of each circle of the coil spring has a positioning bend 692 inserted into the corresponding side valve seat, and the other ends of each circle of the coil spring are connected to each other to form a positioning cross bar 691. The outer periphery of the annular sleeve 631 is provided with a slot 634 for accommodating the positioning cross bar 691.

[0463] Correspondingly, each valve seat is provided with an insertion hole 619 for the positioning bend 692 to be inserted into.

[0464] In order to further stabilize the position of the coil spring before and after deformation, in one embodiment, in the axial direction of the valve core, the outer periphery of the valve core 62 includes three sections, the ratchet 622 is fixedly distributed in the middle section, and the smooth sections 625 are on both sides, and the two coil springs are respectively mounted on the smooth sections 625 on the corresponding sides.

[0465] See also Figure 13a - Figure 13b In one embodiment of the interventional instrument delivery system of the present application, two cylinders are used, namely a first cylinder 31 and a second cylinder 32. A first piston 4 is installed in the first cylinder 31, and the first cylinder 31 has a connecting port 314 and a connecting port 315; a second piston 9 is installed in the second cylinder 32, and the second cylinder 32 has a connecting port 324 and a connecting port 325.

[0466] The pipe fitting that moves axially relative to each other includes a second pipe fitting fixedly connected to the first piston 4, an intermediate pipe fitting fixedly connected to the second piston 9, and a first pipe fitting fixedly connected to the control handle. In addition, the control handle is connected to a protective tube located on the outer periphery of the second pipe fitting through a fixed sleeve 8, and the fixed sleeve 8 connected to the protective tube has an exhaust hole 82.

[0467] The hydraulic drive circuit is also provided with a multi-way switching valve 6, a drive pump 5 with an inlet 54 and an outlet 55, and a liquid storage tank 7 with an inlet 73 and an outlet 74. A first non-return valve 331 is connected to the inlet 54 of the drive pump 5; a second non-return valve 332 is connected to the outlet 55 of the drive pump 5. Each component is connected through a corresponding hydraulic pipeline 33.

[0468] In this embodiment, the multi-way switching valve 6 has a total of seven interfaces, two of which are drive-side interfaces 67, which are respectively connected to the outlet and inlet of the drive pump 5 (indirectly connected through a check valve and a liquid storage tank). The other five of the multi-way switching valve 6 are working-side interfaces 68, two of which are connected to the two communication ports of the first cylinder 31, two are connected to the two communication ports of the second cylinder 32, and one is connected to the exhaust hole 82.

[0469] If a separate exhaust pipe is configured, a multi-way switching valve with six interfaces can also be used, that is, two are drive-side interfaces 67, which are respectively connected to the outlet and inlet of the drive pump 5 (indirectly connected through a check valve and a liquid storage tank). The other four of the multi-way switching valve are working-side interfaces 68, two of which are connected to the two communication ports of the first cylinder 31, and two are connected to the two communication ports of the second cylinder 32.

[0470] Inside the multi-way switching valve 6, the corresponding drive-side interface 67 and working-side interface 68 can be connected through multiple flow channels 66 on the valve core. Taking the multi-way switching valve 6 with a total of seven interfaces as an example, it can be divided into five gears D1 to D5 based on different connection relationships, and each gear realizes different functions.

[0471] Specifically, the functions of each gear are as follows:

[0472]

[0473]

[0474] Taking the multi-way switching valve 6 with six interfaces as an example, two of which are drive-side interfaces 67, which are respectively connected to the outlet and inlet of the drive pump 5 (indirectly connected through a check valve and a liquid storage tank). The other four of the multi-way switching valve 6 are working-side interfaces 68, two of which are connected to the two communication ports of the first cylinder 31, and two are connected to the two communication ports of the second cylinder 32. Based on different connection relationships, it can be divided into four gears D1 to D4 in the above table, and each gear realizes different functions. Regarding exhaust, a separate exhaust pipe is configured, and the exhaust hole 82 is connected to a joint through a pipe. This joint can be embedded in the housing of the control handle to facilitate cooperation with external pipes, and exhaust is achieved by injecting physiological saline.

[0475] See Figure 14a - Figure 17 , in the following some embodiments, an intervention device release control mechanism is provided, that is, the mutually sliding and nested pipe fittings cooperate with each other to release or recover the intervention device at the distal end. Regarding the control method of the proximal ends of the pipe fittings, it can either combine the control handle of the foregoing embodiments or use the control handle structure of conventional mechanical transmission or electric transmission. Of course, when using the hydraulic drive control handle mentioned above, the liquid pressure can be detected by an induction device, and then corresponding to the force application situation or the relative stroke of the pipe fittings at the distal end, which is more convenient for fine operation and also provides the necessary hardware foundation for the fully automatic mode or combined closed-loop control.

[0476] In one embodiment, an intervention device release control mechanism is provided, which includes a first pipe fitting 11, an intermediate pipe fitting 13, and a second pipe fitting 12 that are slidably nested and fitted with each other from the inside out. The distal end of the first pipe fitting 11 extends out of the intermediate pipe fitting 13, and a mounting head 112 for connecting the intervention device is provided at the extended part. A flexible control member is connected to the intermediate pipe fitting 13, and the control member has:

[0477] A holding state, in which the control member passes through the mounting head 112 and binds the intervention device to the mounting head 112;

[0478] An open state, allowing the intervention device to completely disengage from the mounting head 112;

[0479] A locking member 162 that is matched with the control member is installed on the intermediate pipe fitting 13. The locking member 162 is slidably matched with the intermediate pipe fitting 13 and switches different states of the control member when sliding.

[0480] The holding state is understood that the locking member is still in the locked state, for example, inserted into the locking hole. The control member binds the intervention device to the mounting head. It is not strictly required that the intervention device is in contact with the mounting head. Instead, it should be understood that under the pulling of the control member, the intervention device cannot completely disengage from the mounting head. Of course, if the intervention device abuts against the mounting head or there is interference in space, it is more conducive to the positioning of the intervention device. The release of the intervention device is a gradual process. However, as long as the locking member is still in the locked state, even if there is some loosening or even mutual separation between the intervention device and the mounting head, for the control member, it is still in the holding state, that is, the intervention device cannot completely disengage from the mounting head and be released.

[0481] Correspondingly, the open state of the control member is understood that the locking member is unlocked, for example, disengaged from the locking hole. At this time, the control member can disengage from the locking member, which also means that the intervention device and the control member can be separated from each other. In actual operation, the control member needs to be retracted proximally after the intervention device is released and in place. Therefore, before or at the initial stage of the retraction, there is still contact or entanglement between the control member and the intervention device. However, since the locking member has been unlocked, the state emphasized here is one that allows the intervention device and the control member to be separated from each other, rather than emphasizing that they are far away from each other in space and have no contact. Since the restraint of the control member is lost, of course, it also allows the intervention device to completely disengage from the mounting head.

[0482] In the figure, the first pipe fitting 11 is fixed by inserting the two ends into each other, that is, it includes a distal section 11a and a proximal section 11b. One end of the distal section 11a is provided with a guiding head 111, and the other end is inserted into the proximal section 11b. The mounting head 112 is located at the end of the proximal section 11b. Each section of the first pipe fitting 11 and the mounting head 112 can be fixed to each other by welding or other means.

[0483] Taking the stent 10 as an example of the interventional device, the proximal side generally has connection ears 101. The connection ears are provided with connection holes or hooks for connecting to the control member. The control member is made of a flexible material, facilitating operations such as bending, winding, and knotting.

[0484] In one embodiment, the control member is a ligation wire 18. The proximal end of the interventional device has a plurality of connection ears 101. In the holding state, the ligation wire 18 directly passes through and pulls each connection ear 101;

[0485] Or an annular wire sleeve 19 is disposed through the connection ears 101. In the holding state, the ligation wire 18 bypasses the annular wire sleeve 19 and indirectly pulls the connection ears 101 through the annular wire sleeve 19.

[0486] After the interventional device is released, the annular wire sleeve 19 can be retained on the interventional device and does not withdraw with the ligation wire 18. Compared with the ligation wire 18 directly pulling the connection ears by itself, the annular wire sleeve 19 can be pre-assembled on the interventional device. When used, it is more convenient to wind with the ligation wire 18 on-site, optimizing the stroke of the relatively moving pipe fittings.

[0487] The ligation wire 18 is used to bind and pull the connection ears, thereby controlling the release process to prevent the stent 10 from suddenly expanding radially and injuring the internal tissues. The ligation wire 18 can be selected from the commonly used materials and strengths in the interventional field and can be directly or indirectly connected to the connection ears 101.

[0488] Tightening the ligation wire 18 proximally can cause the connection ears 101 to converge toward the distal side of the mounting head 112. As long as the ligation wire 18 is maintained in the holding state, the release of the stent 10 can be restricted. Of course, the release and recovery of the stent 10 are opposite processes, and the dynamic cooperation between the components is the same.

[0489] In order to reasonably distribute the force application positions when pulling the stent 10, multiple ligation wires 18 can be used. The pulling positions of each ligation wire 18 and the annular wire sleeve 19 are evenly distributed along the circumference of the interventional device.

[0490] When the ligation wire 18 directly pulls the connection ears 101, the number of ligation wires 18 should not be too many, otherwise it may affect the compressed size and loading. For example, it is slightly less than the number of connection ears 101, so that the connection ears 101 can be divided into multiple groups, and each group corresponds to one ligation wire 18.

[0491] The locking member 162 is installed on the intermediate pipe fitting 13. The function of the locking member 162 is to limit at least one end of the ligation wire 18. For example, one end of the ligation wire 18 never detaches from the intermediate pipe fitting, and the other end is connected to the locking member 162 after passing around the connection ears 101. In this way, the stent 10 is bound. Once the locking member releases the ligation wire 18, this end no longer pulls the stent 10, allowing the stent 10 to expand and release until this end is finally withdrawn from the connection ears 101.

[0492] The lashing wire 18 knots or winds itself to form a wire loop, and the locking member 162 is inserted into the wire loop to form a restraint on the lashing wire 18. When the locking member moves, the wire loop can be withdrawn, that is, the corresponding intervention instrument can be completely separated from the mounting head 112.

[0493] When the locking member 162 slides relative to the intermediate pipe fitting 13, corresponding driving means can be adopted. For example, a transmission member is arranged at the proximal end, or when the intermediate pipe fitting 13 moves actively, the locking member 162 moves relatively, or after the intermediate pipe fitting 13 carries the locking member 162 and moves to a preset position, only the locking member 162 is blocked, forming a relative movement with the intermediate pipe fitting 13. Of course, improved solutions are also provided in some of the following embodiments.

[0494] Configuring a transmission member alone may further complicate the structure of the control handle. In order to simplify the corresponding structure, in some embodiments, a solution is provided in which the locking member and the intermediate pipe fitting follow each other and the lashing wire 18 is released in a passive manner.

[0495] In an embodiment, an intervention instrument release control mechanism is provided, which includes a first pipe fitting 11, an intermediate pipe fitting 13, and a second pipe fitting 12 that are slidably nested and matched with each other from inside to outside. The distal end of the first pipe fitting 11 extends out of the intermediate pipe fitting 13, and a mounting head 112 for connecting an intervention instrument is provided at the extended part. A flexible control member is connected to the intermediate pipe fitting 13. The control member has a holding state in which the intervention instrument is restrained on the mounting head 112 and an open state in which the intervention instrument is allowed to completely separate from the mounting head 112.

[0496] A locking member 162 is movably mounted on the intermediate pipe fitting 13. The locking member 162 is configured to limit the control member in the holding state. When the intermediate pipe fitting 13 moves relative to the first pipe fitting 11, the locking member 162 is triggered by the mounting head 112 and releases the control member into the open state.

[0497] In this embodiment, when the intermediate pipe fitting 13 moves relative to the first pipe fitting 11, the locking member 162 follows. Although it is movably mounted on the intermediate pipe fitting 13, a certain friction or other separation resistance can be maintained between them. Therefore, it can follow the intermediate pipe fitting 13. For example, in an embodiment, a fixed base 15 and a slidable movable seat 16 are mounted on the intermediate pipe fitting 13. The locking member 162 is fixed to the movable seat 16. In the holding state, there is a tight fit between the base 15 and the movable seat 16. When the intermediate pipe fitting 13 moves distally relative to the first pipe fitting 11, the movable seat 16 follows the base 15 in movement, and the locking member 162 is blocked, causing the base 15 and the movable seat 16 to move away from each other, that is, releasing the control member into the open state.

[0498] The way the locking member 162 is blocked can be direct abutment, or indirectly applying force through a transmission member to abut against the mounting head. Taking the indirect method as an example, an unlocking rod 163 is fixed on the movable seat 16. The proximal ends of the unlocking rod 163 and the locking member 162 can be connected by an annular portion 161. The three form the movable seat 16. The annular portion 161 can be slidably sleeved on the outer periphery of the intermediate pipe fitting 13. When the intermediate pipe fitting 13 moves distally relative to the first pipe fitting 11 until the unlocking rod 163 abuts against the mounting head 112. At this time, if the intermediate pipe fitting 13 is further pushed, the movable seat 16 overcomes the tight-fitting resistance between it and the base 15 and moves away from the base 15, so that the locking member 162 releases the binding wire 18.

[0499] The tight-fitting manner between the base 15 and the movable seat 16 can be that the unlocking rod 163 penetrates the base 15 and has a tight fit at the penetrating part, or at least one of the unlocking rod 163 and the locking member 162 abuts against the base under the traction of the binding wire 18 and there is at least a frictional resistance that can follow each other.

[0500] When the intermediate pipe fitting 13 moves relative to the first pipe fitting 11, the moving direction of the intermediate pipe fitting 13 is from the proximal end to the distal end; when the locking member 162 is triggered and unlocked by the mounting head 112, the moving direction of the locking member 162 is from the distal end to the proximal end.

[0501] In this application, when the locking member 162 is unlocked, for the operator, it is to push the intermediate pipe fitting distally instead of directly pulling the locking member 162 proximally. During the process of pushing the intermediate pipe fitting distally, it is not immediately unlocked. When pushing the intermediate pipe fitting distally, the control member also moves along and maintains the restraint on the interventional instrument. Therefore, during the release process of the interventional instrument, the controllable stage is longer, which is convenient for emergency recovery at any time during the release process. On the contrary, if the locking member 162 is directly pulled proximally when unlocking, the control of the interventional instrument will be lost prematurely.

[0502] The base 15 can be provided with a lock hole 1522 that cooperates with the locking member 162. When the distal end of the locking member 162 is inserted into the lock hole 1522, since the binding wire 18 is sleeved on the locking member 162, it is in a holding state. If it is taken out of the lock hole 1522, the binding wire 18 is allowed to disengage from the locking member 162 and switch to an open state.

[0503] The control member binds the interventional instrument to the mounting head 112, mainly restricting the complete radial expansion of the interventional instrument and completely disengaging from the mounting head 112. Especially in the compressed state of the interventional instrument after loading, that is, being enclosed in the second pipe fitting 12, all the connecting ears 101 abut against the distal side of the mounting head 112 under the traction of the control member. In order to guide each connecting ear into place and prevent them from being staggered with each other, further improvements are made to the mounting head 112 in the following embodiments.

[0504] In one embodiment, an interventional instrument release control mechanism is provided, comprising a first tube member 11, an intermediate tube member 13, and a second tube member 12 which are slidably nested and matched from the inside to the outside in sequence, the intermediate tube member 13 extending from the distal end of the first tube member 11, and a mounting head 112 for connecting the interventional instrument is provided on the extended portion, and a flexible control member is connected to the intermediate tube member 13, and the control member has a holding state for binding the interventional instrument to the mounting head 112, and an opening state for allowing the interventional instrument to be completely separated from the mounting head 112;

[0505] The intermediate tube 13 is located at the proximal side of the mounting head 112, and the interventional instrument is located at the distal side of the mounting head 112. A convergence guide hole 1121 is provided on the mounting head 112. The convergence guide hole 1121 is used for the control component to pass through and connect the interventional instrument, and the proximal side of the interventional instrument is restricted to the convergence guide hole 1121 in a maintained state.

[0506] On the one hand, the convergence guide hole 1121 can guide and limit the extension path of the control member. On the other hand, under the traction of the control member, the connecting ears can have a tendency to gather together and converge into the convergence guide hole 1121, which is convenient for loading the interventional instrument and maintaining it in a compressed state. Especially during recovery, its guiding role is more prominent.

[0507] When the interventional instrument is released, the control member gradually moves toward the distal end, and the divergent and outward expansion of each connecting ear 101 is also gradual. By controlling the release speed of the control member, the sudden outward expansion of the connecting ear 101 can be prevented from causing damage to surrounding tissues in the body.

[0508] The control member extends from the intermediate tube 13 to the distal end to connect with the interventional instrument and then returns to the intermediate tube 13 to the proximal end. In the maintained state, the control member is guided back and forth relative to the mounting head 112, and at least one of the forward and return paths passes through the convergence guide hole 1121.

[0509] In a preferred embodiment, both the outgoing and return paths of the control member pass through the convergence guide hole 1121. To avoid extending outside the periphery of the mounting head 112 as much as possible and reduce interference with other components, in order to improve the convergence and guidance effect, in a further preferred embodiment, there are one or more control members, and for the same control member, the outgoing and return paths pass through the same convergence guide hole 1121.

[0510] In order to facilitate assembly and have a regular outer peripheral shape, in one embodiment, the mounting head 112 is columnar and has an axial through hole, and the first pipe 11 passes through the axial through hole. The mounting head 112 and the first pipe 11 are fixed to each other by at least one of welding, bonding, interference fit, and auxiliary connecting parts.

[0511] In other embodiments, the mounting head 112 may also be an annular member with a through hole in the middle, such as an annular sheet.

[0512] In order to reasonably distribute the traction force in the circumferential direction and enable the connecting ear to have an appropriate converging tendency, in one embodiment, there are multiple converging guide holes 1121. The proximal side of the interventional device is provided with a connecting ear 101 for threading the control member. The connecting ears 101 are divided into multiple groups. Before the interventional device is released, the connecting ears in the same group converge to a corresponding converging guide hole 1121.

[0513] In order to cooperate with the grouping mode of the connecting ears 101, multiple converging guide holes 1121 are evenly distributed along the circumferential direction of the mounting head 112.

[0514] Combined with the number of groups of the connecting ears 101, the number of converging guide holes 1121 is 2 to 4. Too many groups or no grouping can make the distribution of the stress points more uniform, but will lead to the arrangement of the locking member and the control member being too complex and not conducive to compression loading. The converging guide holes 1121 extend along the axial direction of the first pipe fitting 11 and penetrate through the mounting head 112. In order to avoid the control member reducing interference and friction with other components (such as reducing friction with the inner wall of the second pipe fitting 12), the converging guide holes 1121 extend inside the mounting head 112 and are only open at the axial two end faces of the mounting head 112, that is, not exposed to the outer periphery of the mounting head 112.

[0515] In a preferred embodiment, the opening part of the converging guide hole 1121 on the distal side is provided with a guiding flaring 1122. It is more convenient for the connecting ears 101 in the same group to be positioned at the converging guide hole 1121 after converging.

[0516] In order to further optimize the unlocking mode of the locking member and rationally utilize a limited number of pipe fittings, in some embodiments, a release control mechanism for an interventional device is provided, including a first pipe fitting 11, an intermediate pipe fitting 13, and a second pipe fitting 12 that are slidably nested and fitted with each other from the inside to the outside. The distal end of the first pipe fitting 11 extends out of the intermediate pipe fitting 13, and a mounting head 112 for connecting the interventional device is provided at the extending part. A flexible control member is connected to the intermediate pipe fitting 13. The control member has a holding state that binds the interventional device to the mounting head 112 and an open state that allows the interventional device to completely disengage from the mounting head 112;

[0517] A fixed base 15 and a slidable movable seat 16 are mounted on the intermediate pipe fitting 13. A locking member 162 and an unlocking rod 163 are fixed on the movable seat 16. The unlocking rod 163 penetrates through the base 15, and one end extending out of the base 15 serves as a trigger end 1631. A lock hole 1522 for receiving the locking member 162 is provided on the base 15;

[0518] The control member is sleeved on the locking member 162 in the holding state, and the end of the locking member 162 is inserted into the locking hole 1522. When the intermediate pipe fitting 13 moves distally relative to the first pipe fitting 11, the triggering end 1631 of the unlocking lever 163 abuts against the mounting head 112 and drives the locking member 162 to move proximally out of the locking hole 1522, enabling the control member to enter the open state.

[0519] In the following embodiments, further improvements are also made to the specific structures or mating relationships of the components in the release control mechanism. For example, the movable seat 16 includes:

[0520] An annular portion 161, which is slidably sleeved on the intermediate pipe fitting 13 and is located on the proximal side of the base 15;

[0521] A locking member 162, which is rod-shaped and extends distally from the annular portion 161;

[0522] An unlocking lever 163, which extends distally from the annular portion 161 and has an extension length greater than that of the locking member 162.

[0523] The locking member 162 and the unlocking lever 163 need to move axially and slide fit with corresponding through-hole structures (such as the relief hole 1511, the locking hole 1522, and the guiding hole 1523). Therefore, they are generally rod-shaped and adapted to the through-hole diameter. Since the movable seat 16 needs to move with the base 15 during unlocking, at least one of the locking member 162 and the unlocking lever 163 can be in interference fit with the corresponding through-hole structure. However, the interference degree should not be too tight to avoid hindering unlocking.

[0524] Since the unlocking lever 163 is longer than the locking member 162, when moving, the unlocking lever 163 first abuts against the mounting head 112. When the intermediate pipe fitting 13 (together with the base) further moves distally, the unlocking lever 163 is blocked, and together with the locking member 162, it will move relative to the intermediate pipe fitting 13 to achieve unlocking.

[0525] In one embodiment, along the circumferential direction of the annular portion 161, the locking member 162 and the unlocking lever 163 are alternately arranged at intervals, which can reasonably distribute the force. For example, the locking member 162 and the unlocking lever 163 are respectively two, and are alternately arranged at uniform intervals.

[0526] The control member in each embodiment is a lashing wire 18;

[0527] In the holding state, the lashing wire 18 directly or indirectly winds around the interventional instrument, and both ends of the lashing wire 18 are relatively fixed to the locking member 162;

[0528] In the open state, at least one end of the lashing wire 18 is separated from the locking member 162 to release the restraint on the interventional instrument.

[0529] In order to relatively fix both ends of the tying wire 18 to the locking member 162, in one embodiment, one end of the tying wire 18 is provided with a fixed wire loop 181, and the other end is provided with a movable wire loop 182;

[0530] In the holding state, the fixed wire loop 181 is sleeved on the unlocking rod 163, and the movable wire loop 182 is sleeved on the locking member 162;

[0531] In the open state, the fixed wire loop 181 is sleeved on the unlocking rod 163, and the movable wire loop 182 is disengaged from the locking member 162.

[0532] The fixed wire loop 181 and the movable wire loop 182 are in relation to the base 15 or the movable seat 16. The movable wire loop 182 needs to switch the state of the control member, so the cooperation relationship with the locking member 162 can be changed, which is equivalent to changing the cooperation relationship with the base 15 or the movable seat 16. The fixed wire loop 181 does not need to change the cooperation relationship, that is, it always remains relatively fixed to facilitate the withdrawal of the tying wire out of the body after the operation.

[0533] In this embodiment, the fixed wire loop 181 is always sleeved or tied to the unlocking rod 163 of the movable seat 16, and the movable wire loop 182 can change the relationship with the locking member 162, and also makes the control member switch between the holding state and the open state.

[0534] In the holding state, both the fixed wire loop 181 and the movable wire loop 182 are connected to the movable seat 16, and the middle part of the tying wire 18 is directly or indirectly wound around the interventional instrument, which can more effectively distribute the stroke of each component and improve the manipulation efficiency.

[0535] In other embodiments, the fixed wire loop 181 may not be adopted, and other methods may be used to relatively fix to the base 15 or the movable seat 16. For example, the base 15 or the movable seat 16 is drilled, and one end of the tying wire 18 is fixed in the hole, or although the fixed wire loop 181 is adopted but it is not sleeved on the unlocking rod 163, but is connected to other parts of the base 15 or the movable seat 16, as long as mutual separation is avoided.

[0536] In other embodiments, one end of the tying wire 18 is fixed to the mounting head 112, and the other end is provided with a movable wire loop 182;

[0537] In the holding state, the movable wire loop 182 is sleeved on the locking member 162;

[0538] In the open state, the movable wire loop 182 is disengaged from the locking member 162.

[0539] The end fixed to the mounting head 112 can pull the whole tying wire out of the body after the operation.

[0540] When the ligation thread is made of a suitable material, it can even remain in the body after surgery. In other embodiments, one end of the ligation thread 18 is fixed to the interventional device, and the other end is provided with a movable wire loop 182;

[0541] In the holding state, the movable wire loop 182 is sleeved on the locking member 162;

[0542] In the open state, the movable wire loop 182 is disengaged from the locking member 162.

[0543] After surgery, after each pipe fitting of the delivery system is withdrawn from the body, the ligation thread will remain in the body due to the fixation of one end to the interventional device.

[0544] The formation of each wire loop can be in the form of a loop near the wire end, or it can be wound in a back-and-forth manner, that is, not locally forming a loop. For example, the ligation thread is in the form of a ring and is sleeved on the unlocking rod 163 and the locking member 162 at the same time. It is roughly the same when connected to the mounting head 112 or the interventional device.

[0545] The base 15 is fixedly arranged on the intermediate pipe fitting 13. The base 15 provides a locking hole 1522 that cooperates with the locking member 162. When the movable seat 16 moves relative to the base 15, the locking member 162 and the locking hole 1522 switch the cooperation relationship. When the locking member 162 is inserted into the locking hole 1522, the fixed wire loop 181 cannot be disengaged. When the locking member 162 is withdrawn from the locking hole 1522, the fixed wire loop 181 is allowed to disengage from the locking member 162.

[0546] In one embodiment, in order to guide the relative movement between the movable seat 16 and the base 15, a guiding hole 1523 for the unlocking rod 163 to penetrate is provided on the base 15. In the open state, at least a part of the unlocking rod 163 remains in the guiding hole 1523.

[0547] Regarding the specific structure of the base, in one embodiment, the base 15 has an axial channel, and the distal part of the intermediate pipe fitting 13 is inserted and fixed in the axial channel. Specifically, the base 15 includes:

[0548] A proximal disk 151, which is provided with a relief hole 1511 for the locking member 162 and the unlocking rod 163 to pass through respectively;

[0549] A distal disk 152, which is provided with a locking hole 1522 that cooperates with the locking member 162 and a guiding hole 1523 for the unlocking rod 163 to penetrate;

[0550] A transition section 153, which is fixedly connected between the proximal disk and the distal disk.

[0551] The periphery of the transition section 153 is a mating area that is radially retracted relative to the proximal disk 151 and the distal disk 152. In the holding state, the connection parts of the lashing wire 18 with the locking member 162 and the unlocking lever 163 are all located in the mating area. The radially retracted mating area can accommodate the wire loop or knot of the lashing wire 18, and as much as possible avoid occupying the space outside the proximal disk 151 and the distal disk 152 in the radial direction, which is more convenient for loading.

[0552] In the open state, the locking member 162 withdraws from the locking hole 1522 until the distal part of the locking member 162 is adjacent to the proximal disk 151. That is, the locking member 162 is basically retracted into the corresponding avoidance hole 1511 to ensure the unlocking of the movable wire loop 182.

[0553] The proximal disk 151 is provided with a receiving groove 1512 on the side facing the annular part 161. The proximal ends of the locking member 162 and the unlocking lever 163 are connected through the annular part 161. In the holding state, the annular part 161 is located in the receiving groove 1512, and the avoidance hole 1511 is opened at the bottom of the receiving groove 1512.

[0554] In order to prevent the lashing wire 18 from being scattered and further regularize the extending path, in one embodiment, a wire passing groove 1521 for the lashing wire 18 to pass through is opened on the outer periphery of the distal disk 152. In a further preferred embodiment, the wire passing groove 1521 is open to the outer periphery of the distal disk 152. It is more convenient for the lashing wire 18 to extend and be in place, and reduces the difficulty of threading. In some embodiments, a support sleeve 17 is fixed on the intermediate pipe fitting 13, and the outer wall of the support sleeve 17 is close to the inner wall of the second pipe fitting 12.

[0555] The support sleeve 17 can prevent the second pipe fitting 12 from being too tightly tightened on the movable seat 16 in the vicinity of the movable seat 16, so as to avoid unnecessary movement of the movable seat 16 when the second pipe fitting 12 moves. In addition, the support sleeve 17 also cooperates with the base 15 to limit the movable seat 16. For example, the support sleeve 17 is located at the proximal end of the base 15 and is arranged at intervals, and the sliding stroke of the movable seat 16 is limited between the support sleeve 17 and the base 15. When loading the interventional device, it is necessary to push the second pipe fitting 12 distally. In order to make the distal side of the second pipe fitting 12 smoothly sleeved and received the movable seat 16 and the support sleeve 17, in a preferred embodiment, the support sleeve 17 has a first guiding surface 171 that gradually reduces in diameter from the distal end to the proximal end on the side facing the proximal end.

[0556] The distal side of the second pipe fitting 12 first contacts the first guiding surface 171, and under the action of the first guiding surface 171, it gradually self-aligns and receives the support sleeve 17, and it is also relatively easy to further receive the movable seat 16 and the base 15 after passing over the support sleeve 17.

[0557] In order to save axial space, in one embodiment, the support sleeve 17 has a second guiding surface 172 on the side facing the distal end, which gradually reduces in diameter from the proximal end to the distal end. When the movable seat 16 moves proximally to the extreme position, it abuts against the second guiding surface 172.

[0558] Relative to the base 15, when the movable seat 16 moves proximally, the annular portion 161 is gradually sleeved on the second guiding surface 172. Similar to the function of the previous first guiding surface 171, under the action of the second guiding surface 172, on the one hand, the annular portion 161 adapts to be centered, and on the other hand, when the annular portion 161 can move along the second guiding surface 172, the stroke is further increased to ensure the unlocking effect.

[0559] Of course, when combined with the aforementioned hydraulic-driven control handles, in one embodiment, an interventional device delivery system is also provided, including a release control mechanism having the aforementioned structure, and a control handle for driving the release control mechanism. The proximal ends of the various pipe fittings in the release control mechanism are connected to the control handle, and the relative movement of the various pipe fittings is driven in a hydraulic manner at the control handle.

[0560] It can also be combined with all the aforementioned embodiments. In one embodiment, an interventional device delivery system is provided, including a release control mechanism and a control handle for driving the release control mechanism. The proximal ends of the various pipe fittings in the release control mechanism are connected to the control handle, and the relative movement of the various pipe fittings is driven in a hydraulic manner at the control handle;

[0561] Wherein the interventional device is loaded into the release control mechanism. The release control mechanism includes a first pipe fitting 11, an intermediate pipe fitting 13, and a second pipe fitting 12 that are slidably nested and fitted with each other from the inside out. The distal end of the first pipe fitting 11 extends out of the intermediate pipe fitting 13, and a mounting head 112 for connecting the interventional device is provided at the extended portion.

[0562] A flexible control member and a locking member 162 cooperating with the control member are connected to the intermediate pipe fitting 13. The proximal end of the interventional device is bound to the mounting head 112 by the control member in a compressed state, and the interventional device is wrapped by the second pipe fitting 12;

[0563] When the interventional device is released:

[0564] Relative to the first pipe fitting 11, slide the second pipe fitting 12 proximally until the interventional device is completely exposed;

[0565] Relative to the first pipe fitting 11, slide the intermediate pipe fitting 13 distally, so that the control member follows distally and allows the proximal end of the interventional device to gradually move away from the mounting head 112;

[0566] Drive the locking member 162 to move to release the control member, so that the interventional device is disengaged from the mounting head 112 and completely released.

[0567] Combine Figure 15a - Figure 17, using the above release control mechanism and the interventional device delivery system, in one embodiment, a method for releasing an interventional device is further provided. The interventional device is loaded into the release control mechanism. The release control mechanism includes a first pipe fitting 11, an intermediate pipe fitting 13, and a second pipe fitting 12 that are slidably nested and cooperated with each other from the inside out. The distal end of the first pipe fitting 11 extends out of the intermediate pipe fitting 13, and an installation head 112 for connecting the interventional device is provided at the extended part. A locking member 162 that cooperates with the control member is installed on the intermediate pipe fitting 13. The proximal end of the interventional device is constrained by the control member to the installation head 112 in a compressed state, and the interventional device is wrapped by the second pipe fitting 12;

[0568] The release method includes:

[0569] Step S100, slide the second pipe fitting 12 proximally relative to the first pipe fitting 11 until the interventional device is completely exposed;

[0570] Step S200, slide the intermediate pipe fitting 13 distally relative to the first pipe fitting 11, so that the control member follows distally and allows the proximal end of the interventional device to gradually move away from the installation head 112;

[0571] Step S300, drive the locking member 162 to move to release the control member, so that the interventional device is completely released.

[0572] The proximal end of the stent 10, that is, the connecting ear 101, is divided into two groups in a compressed state. Each group is gathered and pulled to be positioned in the converging guiding hole 1121 of the installation head 112, and an annular wire sleeve 19 is wound around each connecting ear 101;

[0573] There are two tying wires 18. One end of each tying wire 18 has a fixed wire loop 181, and the other end has a movable wire loop 182. The threading method is as follows:

[0574] The fixed wire loop 181 at one end is sleeved on the unlocking rod 163. The other end extends toward the converging guiding hole 1121 through the wire groove 1521, and is wound with the annular wire sleeve 19 and then returns proximally. When returning proximally, it still passes through the same wire groove 1521. After returning, it is sleeved on the locking member 162 through the movable wire loop 182. The middle part of the tying wire 18 is hung on the annular wire sleeve 19 to achieve mutual traction. According to the length of the annular wire sleeve 19, the position where the tying wire 18 is wound with the annular wire sleeve 19 can be inside the converging guiding hole 1121 or on the proximal side outside the converging guiding hole 1121;

[0575] After the annular wire sleeve 19 is pulled, it extends proximally through the converging guiding hole 1121, and at the same time drives the two groups of connecting ears to converge and gather respectively. At this time, the locking member 162 is inserted into the locking hole 1522, and the unlocking rod 163 is inserted into the guiding hole 1523. Therefore, both ends of the tying wire 18 are locked, that is, in a holding state, and the annular portion 161 is exactly received in the accommodating groove 1512.

[0576] In other embodiments, when the annular wire sleeve 19 is not provided, the threading method of the binding wire 18 is as follows:

[0577] The fixed wire loop 181 at one end is sleeved on the unlocking rod 163, and the other end extends through the wire groove 1521 to the converging guiding hole 1121, and further extends distally after entering the converging guiding hole 1121 and threads through the connecting lugs of the same group. After threading through the connecting lugs, it returns proximally through the same converging guiding hole 1121, and still passes through the same wire groove 1521 when returning proximally. After returning, it is sleeved on the locking member 162 through the movable wire loop 182. The relative movement between the first pipe fitting 11, the intermediate pipe fitting 13, and the second pipe fitting 12 can utilize the prior art or the control handles in combination with the foregoing embodiments. For example, at the proximal end, a control handle is used and the relative movement of the pipe fittings is driven hydraulically. When the pipe fittings move relative to each other, the pressure of the hydraulic drive circuit can also be detected in real time as an operation reference or warning.

[0578] For example, in step S100, the multi-way switching valve is adjusted to the corresponding gear, and the driving pump is operated to drive the piston to move the second pipe fitting 12 proximally. During the movement, the stent 10 will be gradually exposed and expand radially outward. When the stent 10 is completely exposed from the second pipe fitting 12, since the connecting lug 101 is still pulled and restricted by the annular wire sleeve 19 at this time, only the distal part of the stent 10 expands and is released, and the proximal end remains in the compressed state.

[0579] In step S200, when the intermediate pipe fitting 13 slides distally relative to the first pipe fitting 11, the binding wire 18 gradually moves distally, relaxing the pull on the connecting lug 101. The connecting lug 101 gradually expands outward under the action of the elasticity of the stent 10, disengages from the converging guiding hole 1121, and gradually moves away from the mounting head 112; since the binding wire 18 always maintains the pull, the speed and amplitude of the proximal expansion of the stent are controllable. When adjustment or recovery is required due to improper position or posture, the intermediate pipe fitting 13 can be slid proximally relative to the first pipe fitting 11, that is, the connecting lug is pulled back to converge to the converging guiding hole 1121 through the binding wire 18, and the second pipe fitting 12 can be slid distally to re-accommodate the stent 10.

[0580] When the intermediate pipe fitting 13 slides distally, since the base 15 and the movable seat 16 are inserted into each other and are pulled by the binding wire 18, sufficient frictional resistance is obtained between the base 15 and the movable seat 16, so that the movable seat 16 follows distally, that is, the locking member 162 always remains in the locking hole 1522, and the unlocking rod 163 also always remains in the guiding hole 1523, preventing the movable wire loop 182 of the binding wire 18 from loosening.

[0581] In step S300, the method of driving the locking member to move and release the control member is to slide the intermediate pipe fitting 13 distally relative to the first pipe fitting 11 until the triggering end 1631 of the unlocking rod 163 abuts against the proximal side of the mounting head 112;

[0582] When the intermediate pipe fitting 13 is further slid distally, the unlocking lever 163 is blocked, the movable seat 16 cannot follow, and it overcomes the frictional resistance and separates from the base 15. The locking member 162 gradually withdraws from the locking hole 1522. When the locking member 162 gradually retracts into the avoidance hole 1511, it also separates from the movable wire loop 182, so that the binding wire 18 is released until the movable seat 16 abuts against the support sleeve 17, that is, it reaches the limit position, or the base 15 abuts against the mounting head 112, which can also be used as a way to limit the limit stroke.

[0583] Since the movable wire loop 182 disengages from the locking member 162 and no longer restrains the connecting ear 101, the bracket 10 can be completely released.

[0584] After the bracket 10 is completely released, first slide the intermediate pipe fitting 13 proximally relative to the first pipe fitting 11 to separate the base 15 from the mounting head 112, avoiding clamping the binding wire 18 between the two, ensuring the complete release of the bracket, and then retract the first pipe fitting 11 and the intermediate pipe fitting 13 into the second pipe fitting 12, and synchronously retract all pipe fittings proximally.

[0585] Figure 18a - Figure 18c In [the figure], the structure and application scenario of the vena cava valve are further illustrated. The vena cava is divided into the superior vena cava 1300 and the inferior vena cava 1200, both of which are connected to the right atrium 1000, and the right atrium 1000 is connected to the right ventricle 1100 through the tricuspid valve. That is, this embodiment also discloses a vena cava valve replacement system for implanting a vena cava valve at the superior or inferior vena cava via the femoral vein, including the vena cava valve and each of the above-mentioned interventional device delivery systems.

[0586] The vena cava valve can be placed either in the superior vena cava 1300 (adjacent to the right atrium 1000) or in the inferior vena cava 1200 according to requirements. In terms of its own structure, the vena cava valve includes:

[0587] A bracket 10, the bracket 10 is a mesh cylinder structure and the inside is a blood flow channel. The bracket 10 has opposite inflow and outflow ends in the axial direction.

[0588] For the convenience of positioning, it may further include:

[0589] Valve leaflets 102, the valve leaflets are connected in the blood flow channel of the bracket and can open or close the blood flow channel under the action of blood flow;

[0590] An expansion mask 103, the expansion mask 103 is connected to the bracket 10 and surrounds the outer periphery of the outflow end. The expansion mask 103 is an expansion structure facing away from the inflow end.

[0591] A plurality of connection lugs 101 are provided at the inflow end of the stent 10. An annular wire sleeve 19 can be threaded through the connection lugs 101. In addition, the end of the flared mask 103 and the outflow end of the stent 10 are respectively provided with V-shaped portions, and the annular wire sleeve 19 or the lashing wire 18 can also be threaded through each V-shaped portion for release control according to the release or traction direction.

[0592] The stent 10 sequentially includes, along the blood flow direction:

[0593] An inflow section 106, on one side of the inflow end;

[0594] A waist portion 105, at the middle of the axial direction of the stent 10;

[0595] An outflow section 104, extending from the portion where the flared mask 103 is connected to the stent 10 towards the outflow end side;

[0596] Of course, each part of the stent 10 has an opposite inflow side and outflow side.

[0597] In some embodiments, not only for vena cava valves, when setting the annular wire sleeve 19 in an interventional device with connection lugs or similar structures, different threading methods and connections with the lashing wire 18 can be adopted.

[0598] Figure 19a Among them, there are two lashing wires 18. One end of each lashing wire is provided with a fixed wire loop 181, and the other end is provided with a movable wire loop 182. One lashing wire bypasses the connection point M1 to realize the traction with the annular wire sleeve 19, and the other lashing wire bypasses the connection point M2 to realize the traction with the annular wire sleeve 19. And the two connection points do not bisect the annular wire sleeve 19, that is, the corresponding central angle is less than 180 degrees. Taking six connection lugs as an example, there are four on one side of the line connecting the two connection points and two on the other side. Figure 19b Among them, there are four lashing wires 18. One end of each lashing wire is provided with a fixed wire loop 181, and the other end is provided with a movable wire loop 182. Each lashing wire bypasses the corresponding connection point to realize the traction with the annular wire sleeve 19, that is, there are four connection points.

[0599] Figure 19c Among them, there are two lashing wires 18. One end of each lashing wire is provided with a fixed wire loop 181, and the other end is provided with a movable wire loop 182. One lashing wire bypasses the connection point M1 to realize the traction with the annular wire sleeve 19, and the other lashing wire bypasses the connection point M2 to realize the traction with the annular wire sleeve 19. And the two connection points bisect the annular wire sleeve 19, that is, the corresponding central angle is approximately equal to 180 degrees. Taking six connection lugs as an example, there are three on one side of the line connecting the two connection points and three on the other side.

[0600] Figure 19dAmong them, there are three lashing wires 18. One end of each lashing wire is provided with a fixed wire loop 181, and the other end is provided with a movable wire loop 182. Each lashing wire bypasses the corresponding connection point to realize the pulling with the annular wire sleeve 19, that is, there are three connection points.

[0601] Figure 19c Among them, the annular wire sleeve 19 is also connected with two cross-over segments 191. There are two lashing wires 18. One end of each lashing wire is provided with a fixed wire loop 181, and the other end is provided with a movable wire loop 182. One of the lashing wires bypasses the connection point M1 to realize the pulling with the cross-over segment 191, and the other lashing wire bypasses the connection point M2 to realize the pulling with the cross-over segment 191. The lashing wires 18 indirectly pull the annular wire sleeve 19 through the cross-over segments 191. The application force points can be configured more flexibly through the cross-over segments 191, which is convenient for the grouped binding of the connecting ears and the adjustment of the turning points when the lashing wires extend to the distal end, that is, the lengths of the lashing wires 18 can also be adjusted flexibly.

[0602] Figure 19a - Figure 19e It mainly shows the combination mode of the lashing wire 18 and the annular wire sleeve 19, and does not limit the pulling direction of the lashing wire 18. The direction of the lashing wire 18 in the figure is only for the convenience of marking and reading.

[0603] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification. When the technical features in different embodiments are embodied in the same drawing, it can be regarded that the drawing also discloses the combination examples of the various embodiments involved at the same time.

[0604] The above-mentioned embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. An interventional device delivery system facilitating single-handed operation, comprising a plurality of pipe fittings coaxially arranged from inside to outside, and a control handle for driving the relative movement of the plurality of pipe fittings. The distal ends of the pipe fittings are used to cooperate with each other to operate an interventional device, and the proximal ends of the pipe fittings are connected to the control handle, characterized in that, A hydraulic drive circuit for driving the relative movement of each pipe fitting is arranged at the control handle, and the hydraulic drive circuit comprises at least one drive pump for driving the flow of liquid and a control valve for controlling the flow direction of the liquid; The control handle has a gripping portion, the operating component of the driving pump is arranged on the gripping portion, and the operating component of the control valve is adjacent to the gripping portion; The control handle comprises a working part and a holding part connected to the working part, a cylinder with a piston inside is arranged in the working part, the multiple pipes are inserted into the cylinder and connected to the piston or fixed relative to the cylinder, and the pipes are driven to move relative to each other in the cylinder by hydraulic means; The control valve adopts a multi-way switching valve, and the multi-way switching valve comprises: Two valve seats arranged opposite to each other, one of which is provided with a driving side interface connected to the hydraulic driving circuit, and the other valve seat is provided with a working side interface of the hydraulic driving circuit; A valve core which is sealed and fastened by two valve seats and is rotatably installed, wherein the valve core has a communication hole. When the valve core is rotated to different angles, the communication hole connects the corresponding drive side interface with the working side interface; The wrench linked with the valve core is used to change the rotation angle of the valve core, and the wrench serves as an operating component of the control valve.

2. The intervention device delivery system facilitating single-handed operation according to claim 1, wherein The driving pump comprises: A pump housing fixed in the control handle and connected to the hydraulic drive circuit; A working part movably mounted in the pump housing for driving the flow of liquid; A driving member movably mounted on the holding portion and linked to the working member, and the driving member serves as an operating member of the driving pump; A return spring acts between the control handle and the drive member.

3. The intervention device delivery system facilitating single-handed operation according to claim 2, wherein The wrench and the holding portion are located on the same side of the working portion in a radial direction.

4. The intervention device delivery system facilitating single-handed operation according to claim 3, characterized in that The wrench is located at the proximal side of the holding portion, and the driving member faces the wrench.

5. The intervention device delivery system facilitating single-handed operation according to claim 1, wherein, An anti-drop blocking member is provided at one end of the holding portion away from the working portion.

6. The intervention device delivery system facilitating single-handed operation according to claim 5, characterized in that, The anti-dropping stopper surrounds the wrench.

7. The intervention device delivery system facilitating single-handed operation according to claim 1, characterized in that, The wrench comprises an annular sleeve located at the periphery of the valve core, and a hooking portion fixed to the annular sleeve and extending to the outside of the control handle; the inner edge of the annular sleeve and the periphery of the valve core are linked via a mutually cooperating one-way clutch mechanism.

8. The intervention device delivery system facilitating single-handed operation according to claim 7, wherein, The one-way clutch mechanism comprises: Ratchet teeth distributed around the outer periphery of the valve core; An elastic claw fixed to the inner circumference of the annular sleeve; The wrench has a relative positive and reverse rotation direction relative to the valve core. During positive rotation, the elastic claw engages with the ratchet to drive the valve core. During reverse rotation, the elastic claw deforms and slips off the ratchet, and the wrench reset member drives the wrench to rotate in reverse.

9. The intervention device delivery system facilitating single-handed operation according to claim 8, wherein, The multi-way switching valve includes a wrench reset member acting between the wrench and at least one valve seat.

10. The intervention device delivery system facilitating single-handed operation according to claim 9, wherein The wrench reset member is a coil spring extending around the valve core axis, one end of the coil spring is connected to the valve seat, and the other end is connected to the annular sleeve.

11. The intervention device delivery system facilitating single-handed operation according to claim 10, wherein, The coil spring is composed of two coils arranged side by side. In the axial direction of the valve core, each coil spring is located on both sides of the annular sleeve. One end of each coil spring has a positioning bend inserted into the corresponding side valve seat, and the other ends of each coil spring are connected to each other to form a positioning cross bar. The outer periphery of the annular sleeve is provided with a groove for accommodating the positioning cross bar.

12. The intervention device delivery system facilitating single-handed operation according to claim 11, wherein, Each valve seat is provided with an insertion hole for the positioning bend to be inserted therein.

13. The intervention device delivery system facilitating single-handed operation as claimed in claim 1, wherein The cylinder barrel includes a first cylinder barrel and a second cylinder barrel axially butted in sequence, wherein a first piston is slidably installed in the first cylinder barrel, a second piston is slidably installed in the second cylinder barrel, and the multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting coaxially arranged from the inside out; All the pipe fittings enter from the distal end of the first cylinder barrel, wherein the first pipe fitting is fixed to the first piston, after the intermediate pipe fitting extends out of the first piston, it enters the second cylinder barrel via a partition seal and is fixed to the second piston, and after the first pipe fitting extends out of the second piston, it is fixed to the proximal end of the second cylinder barrel.

14. The intervention device delivery system facilitating single-handed operation according to claim 13, characterized in that, The partition seal includes: a cylinder body having an axis, and both axial ends of the cylinder body are respectively placed in the corresponding cylinder barrels on each side; two sealing plugs respectively fixed to one axial end of the cylinder body and respectively in sealing fit with the inner wall of the corresponding cylinder barrel, and each sealing plug is provided with an avoidance hole for the pipe fitting to pass through; two groups of buckles respectively fixed to one axial end of the cylinder body and respectively engaged with the corresponding cylinder barrels.

15. The intervention device delivery system facilitating single-handed operation according to claim 14, wherein A positioning disc is provided on the outer periphery of the cylinder body, and the end faces of the adjacent two cylinder barrels respectively abut against the two opposite sides of the positioning disc; Positioning holes are formed in the barrel walls of each cylinder barrel, the two groups of buckles are fixed to the two opposite sides of the positioning disc, each buckle includes an elastic arm extending from the positioning disc into the cylinder barrel, and a catch at the end of the elastic arm and cooperating with the positioning hole.

16. The intervention device delivery system facilitating single-handed operation according to claim 15, wherein, The end of the catch is provided with a guiding inclined surface for guiding itself to axially enter the positioning hole along the cylinder body.

17. The intervention device delivery system facilitating single-handed operation according to claim 9, wherein, The multiple pipe fittings include a first pipe fitting, an intermediate pipe fitting, and a second pipe fitting coaxially arranged from the inside out; The distal end of the first pipe fitting extends out of the intermediate pipe fitting, and a mounting head for connecting an interventional instrument is provided at the extended part, and a flexible control member is connected to the intermediate pipe fitting, and the control member has: a holding state, in which the control member penetrates through the mounting head and binds the interventional instrument to the mounting head; an open state, allowing the interventional instrument to completely disengage from the mounting head; A locking member cooperating with the control member is installed on the intermediate pipe fitting, and the locking member is slidably fitted relative to the intermediate pipe fitting and switches different states of the control member when sliding.

18. The intervention device delivery system facilitating single-handed operation according to claim 17, wherein, A fixed base and a slidable movable seat are installed on the intermediate pipe fitting, a locking member and an unlocking rod are fixed to the movable seat, the unlocking rod penetrates through the base and the end extending out of the base is used as a trigger end, and a lock hole for receiving the locking member is formed in the base; The control member is sleeved on the locking member in the holding state, and the end of the locking member is inserted into the lock hole. When the intermediate pipe fitting moves distally relative to the first pipe fitting, the trigger end of the unlocking rod abuts against the mounting head and drives the locking member to move proximally out of the lock hole, so that the control member enters the open state.

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