WO2021109616A1

WO2021109616A1 - Valve suture device and valve repair suture device

Info

Publication number: WO2021109616A1
Application number: PCT/CN2020/109627
Authority: WO
Inventors: 李阳; 黄广念; 梁华光; 张庭超
Original assignee: 杭州德晋医疗科技有限公司
Priority date: 2019-12-06
Filing date: 2020-08-17
Publication date: 2021-06-10

Abstract

The present application discloses a valve suture device (50) and a valve repair suture apparatus (100), wherein the valve suture device (50) comprises a clamping assembly (60), a needle assembly (70) and a thread guide (80); the clamping assembly (60) comprises a proximal chuck (61), a chuck push tube (65) and a distal chuck (63), the chuck push tube (65) is movably inserted into the proximal chuck (61) and fixedly connected to the distal chuck (63); the needle assembly (70) is movably inserted into the proximal chuck (61) and connected to the artificial tendon held in the proximal chuck; the thread guide (80) is movably inserted into the chuck push tube (65) and the distal chuck (63), the needle assembly (70) is used to pull the artificial tendon to puncture the valve from the atrium side to the ventricular side and penetrate the thread guide (80), the thread guide is used to tie the artificial tendon to pull the artificial tendon into the chuck push tube and withdraw it toward the proximal end, so that the part of the artificial tendon is confined to the side of the valve close to the atrium, and the artificial tendon passes out from the side of the ventricle and can extend along the side of the ventricle.

Description

Valve suture device and valve repair suture device

Technical field

The present invention relates to the technical field of medical devices, in particular to a valve suture device and a valve repair suture device.

Background technique

Please refer to Figure 1. The left atrium (LA as shown in Figure 1) and the left ventricle (LV as shown in Figure 1) are separated by the mitral valve (MV as shown in Figure 1), and the right atrium (as shown in Figure 1) Show RA) and the right ventricle (RV shown in Figure 1) are separated by the tricuspid valve (TV shown in Figure 1). The tricuspid valve and the mitral valve allow blood to flow from the atrium into the ventricle only, not back flow. Normal and healthy mitral and tricuspid valves have multiple chordae (CT as shown in Figure 1). Take the mitral valve as an example. The valve of the mitral valve is divided into anterior and posterior leaflets. When the left ventricle is in a diastolic state, the two are in an open state, and blood flows from the left atrium to the left ventricle; when the left ventricle is in a contracted state, the tendon The cord is stretched to ensure that the valve will not be rushed to the atrium side by blood flow, and the front and back leaflets are closed well, thereby ensuring that blood flows from the left ventricle to the aorta through the aortic valve. If the chordae tendineae is diseased or ruptured, when the left ventricle is in a contracted state, the mitral valve cannot return to the closed state as in the normal state, and the momentum of the blood flow will further cause the valve to fall into the left atrium, causing blood reflux. The tendons cannot be repaired after they are damaged or ruptured. Even a small number of tendons ruptures can increase the tension of other tendons and cause new tendon ruptures. Mitral valve chordae rupture is typically manifested as acute severe wheezing, dyspnea and other left heart failure, pulmonary edema, and some are progressive chronic heart failure.

There is a minimally invasive interventional artificial chordal instrument, in which the artificial chord is connected to the sleeve and placed in the distal chuck, the instrument is advanced through the apex to the left ventricle and the left atrium, the distal chuck and the proximal clip When the valve is clamped by the head, the distal chuck is located on the atrium side, and the proximal chuck is located on the ventricle side. The needle protrudes from the proximal chuck through the valve and is fixedly connected to the artificial chords in the distal chuck. The needle then withdraws and drives the artificial chord and gasket to withdraw through the valve in turn. The gasket will touch the surface of the valve near the atrium side, that is, the gasket is located on the atrium side, the artificial chordae extends on the ventricular side, and finally the end of the artificial chordae away from the valve is fixed to the ventricular wall or papillary muscle.

However, if the device of this structure is used for transcatheter heart valve repair, the device is allowed to enter the atrium and ventricle through the inferior vena cava or superior vena cava in turn. After clamping the valve, the distal clamp is located in the ventricle On the other side, the proximal chuck is located on the atrial side, and the final gasket is located on the ventricle side. The artificial chordae passes through the atrial side of the valve and extends along the atrial side. The end of the artificial chordae is far away from the valve and away from the ventricular wall or papillary muscle, so it cannot be implemented. Artificial tendon implantation cannot achieve the function of valve repair.

Summary of the invention

In order to solve the aforementioned problems, the present invention provides a valve suture device and a valve repair suture device for implanting artificial chordae. When the heart valve is repaired via a catheter, the artificial chordae is moved from the side of the valve close to the ventricle. Pass out and extend along the side of the ventricle to realize the implantation of artificial chordae.

In the first aspect, the present application provides a valve suture device for implanting artificial chordae, including a clamping assembly, a needle assembly, and a guide; the clamping assembly includes a proximal chuck, a chuck push tube, and The distal chuck, the chuck push tube is movably inserted in the proximal chuck and fixedly connected to the distal chuck, and the chuck push tube is used to drive the distal chuck relative to the proximal chuck. The end chuck moves to clamp or relax the valve; the pin assembly is movably installed in the proximal chuck and connected to the artificial chord which is contained in the proximal chuck, and the lead The device is movably installed in the chuck push tube and the distal chuck, and the needle assembly is used to pull the artificial chordae from the atrium side to the ventricle side to puncture the valve and penetrate the lead guide. The thread guide is used to bind the artificial chordae and pull the artificial chordae into the chuck push tube and withdraw in the proximal direction, so that the part of the artificial chordae is confined to the valve near the atrium One side.

In the second aspect, the present application also provides a valve repair suture device, which includes the valve suture device described above and an operating body. The operating body is provided with a needle control element, a lead control element, and a chuck control element. The needle control member is connected with the proximal end of the pin assembly to control the movement of the pin assembly in the axial direction, and the lead control member is connected with the proximal end of the introducer to control the movement of the introducer in the axial direction, The chuck control member is connected with the proximal end of the chuck push tube to control the chuck push tube to move in the axial direction.

In the valve suture device and valve repair suture device provided in the present application, since the needle assembly is movably inserted in the proximal chuck and connected to the artificial chords contained in the proximal chuck, the thread guide is movably installed in the chuck In the push tube and the distal chuck, the needle can pull the artificial chordae from the atrium side to the ventricular side and then pass through the introducer. The introducer can bind the artificial chordae and pull the artificial chord into the chuck. Withdraw in the proximal direction, so that a part of the artificial chordae can be confined on the side of the valve close to the atrium, and the artificial chordae can pass through from the ventricle side and extend along the ventricular side. The artificial tendon can be anchored later by anchoring. The part of the cord away from the valve is fixed to the ventricular wall or papillary muscle on the side of the ventricle, so as to realize the implantation of the artificial chordae and the repair of the heart valve through the catheter.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a schematic diagram of the heart structure.

Fig. 2 is a three-dimensional assembly schematic diagram of the valve repair suture device provided by the first embodiment of the application.

Fig. 3 is a cross-sectional view of the valve suture device of the valve repair suture device shown in Fig. 2.

Fig. 4 is a schematic diagram of the valve suture device in a clamped state of the valve repair suture device shown in Fig. 2.

Fig. 5 is a three-dimensional cross-sectional view of the valve suture device of the valve repair suture device shown in Fig. 2 in a clamped state.

Fig. 6 is a schematic diagram of the valve suture device of the valve repair suture device shown in Fig. 2 in a punctured state with part of the structure removed.

FIG. 7 is a partial enlarged schematic diagram of the area I shown in FIG. 6.

Fig. 8 is a cross-sectional view of the valve suture device of the valve repair suture device shown in Fig. 2 in a punctured state.

Fig. 9 is a three-dimensional exploded schematic diagram of the valve suture device shown in Fig. 3.

FIG. 10 is a schematic diagram of the structure of the distal chuck cap of the valve suture device shown in FIG. 3.

FIG. 11 is a three-dimensional assembly schematic diagram of the thread guide and the lead control component shown in FIG. 3.

Fig. 12 is a schematic diagram of the distal chuck body of the valve suture device shown in Fig. 3 and the lead guide being assembled together.

Fig. 13 is a three-dimensional schematic diagram of the assembly of the needle assembly and the artificial chord of the valve suture device shown in Fig. 3 together.

Fig. 14 is an axial cross-sectional view of the needle assembly of the valve suture device shown in Fig. 3.

Figure 15 is a cross-sectional view perpendicular to the axial direction of the pin assembly.

Fig. 16 is a schematic diagram showing the assembly of the needle assembly and the artificial chord of the valve suture device shown in Fig. 6 together.

Fig. 17 is a schematic diagram of the pin assembly and artificial chord of Fig. 16 from another perspective.

Fig. 18 is a schematic diagram of the artificial chord and the pin assembled together according to the first embodiment.

Fig. 19 is a cross-sectional view of the sheath of the valve suture device shown in Fig. 3.

Fig. 20 is a schematic diagram of an application scenario of the valve repair suture device shown in Fig. 2 for treating a tricuspid valve.

Fig. 21 is a schematic diagram of an application scenario of the valve repair suture device shown in Fig. 2 for treating the mitral valve.

Fig. 22 is a schematic diagram of the valve repair suture device shown in Fig. 2 before clamping the valve.

Fig. 23 is a schematic diagram of the valve repair suture device shown in Fig. 2 when it is in a puncture state.

Fig. 24 is a three-dimensional schematic diagram of the valve repair suture device shown in Fig. 2 when it is in a puncture state.

Fig. 25 is a schematic diagram when the introducer of the valve repair suture device shown in Fig. 2 starts to withdraw.

Fig. 26 is a three-dimensional schematic diagram when the introducer of the valve repair suture device shown in Fig. 2 starts to be withdrawn.

Fig. 27 is a schematic diagram after the introducer of the valve repair suture device shown in Fig. 2 is withdrawn.

Fig. 28 is a three-dimensional schematic diagram of the valve repair suture device shown in Fig. 2 after the introducer is withdrawn.

Fig. 29 is a schematic diagram showing the state of the artificial chordae after the introducer of the valve repair suture device shown in Fig. 2 is withdrawn.

FIG. 30 is a schematic diagram of the effect of the valve repair suture device provided by an embodiment of the application after use.

FIG. 31 is a schematic structural diagram of the artificial chord and the pin assembled together according to the second embodiment of the application.

Fig. 32 is a three-dimensional assembly schematic diagram of the valve repair suture device provided by the third embodiment of the application.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

In the technical field of interventional medical devices, the position close to the operator is generally defined as the proximal end, and the position far away from the operator is defined as the distal end; the direction of the central axis of rotation of objects such as cylinders and tubes is defined as the axial direction.

The first embodiment

Please refer to FIG. 2, which is a three-dimensional assembly diagram of the valve repair suture device provided by the first embodiment of the application.

The valve repair suture device 100 includes an operating body 10, a sheath 30 and a valve suture device 50. The sheath 30 is fixedly connected between the operating body 10 and the valve suture device 50. The operating body 10 is used to facilitate the user to operate and control the valve suture device 50 to implant the artificial chordae to repair the heart valve.

Please refer to FIGS. 2 and 3 in combination. FIG. 3 is a cross-sectional view of the valve suture device of the valve repair suture device shown in FIG. 2. The valve suture device 50 is used to implant the artificial chord 200. The valve suture device 50 includes a clamping assembly 60, a needle assembly 70 and a thread guide 80. The lead guide 80 and the pin assembly 70 are movably passed through the clamping assembly 60 and the sheath 30. The thread guide 80 and the pin assembly 70 are arranged at intervals. The clamping assembly 60 is fixedly connected to the distal end of the sheath 30.

Please refer to FIGS. 4 and 5 together. The clamping assembly 60 includes a proximal chuck 61, a distal chuck 63 and a chuck push tube 65. The proximal chuck 61 is fixedly connected to the end of the sheath 30 away from the operating body 10 (that is, the distal end of the sheath 30), and the artificial chord 200 is contained in the proximal chuck 61. The chuck push tube 65 movably passes through the proximal chuck 61 and is fixedly connected with the distal chuck 63. The chuck push tube 65 is used to drive the distal chuck 63 to move relative to the proximal chuck 61, so that the distal chuck 63 and the proximal chuck 61 can relatively open and close, so as to cooperate to clamp or relax the heart valve. The pin assembly 70 is movably installed in the proximal chuck 61 and is connected to the artificial chord 200 accommodated in the proximal chuck 61. The lead guide 80 is movably installed in the chuck push tube 65 and the distal chuck 63. The needle assembly 70 is used to pull the artificial chord 200 from the atrium side to the ventricular side to puncture the valve and penetrate the introducer 80. The introducer 80 is used to tie the artificial chord 200 to pull the artificial chord 200 into the chuck push tube 65 and face Withdraw in the proximal direction, so that the part of the artificial chordae 200 is confined to the side of the valve close to the atrium.

It is understandable that the material of the distal chuck 63 is not limited. The material of the distal chuck 63 can be, but is not limited to, polycarbonate (PC), acrylonitrile butadiene styrene copolymer (Acrylonitrile butadiene Styrene). copolymers (abbreviated as ABS) and so on. It can be understood that the material of the proximal chuck 61 is not limited, and the material of the proximal chuck 61 can be, but is not limited to, PC, ABS, and the like.

The operating body 10 is provided with a pin control element 131, a lead control element 132 and a chuck control element 134. The pin control member 131 is connected to the end of the pin assembly 70 away from the distal chuck 63, and is used to control and push the pin assembly 70 to move in the axial direction. The lead control member 132 is connected to the end of the lead guide 80 away from the distal chuck 63 for controlling the lead guide 80 to move in the axial direction. The chuck control member 134 is connected to the end of the chuck push tube 65 away from the distal chuck 63, and is used to control the chuck push tube 65 to move in the axial direction to push the distal chuck 63 to move relative to the proximal chuck 61, thereby The distal chuck 63 and the proximal chuck 61 are controlled to clamp or loosen the valve relative to each other. As shown in FIG. 2, the distal chuck 63 and the proximal chuck 61 are in a relatively relaxed state. As shown in FIG. 4, the distal end chuck 63 and the proximal end chuck 61 are relatively clamped, and the valve repair suture device 100 is in a clamped state. In the clamping state, the chuck push tube 65 applies force to the distal chuck 63, so that the distal chuck 63 and the proximal chuck 61 cooperate with each other to clamp the valve (not shown). In this embodiment, under the action of the chuck control member 134, the chuck push tube 65 applies force to the distal chuck 63, so that the distal chuck 63 and the proximal chuck 61 cooperate with each other to clamp the valve.

It can be understood that FIGS. 4 and 5 are only exemplary. In the process of repairing the heart by the valve repair suture device 100, when the distal chuck 63 and the proximal chuck 61 cooperate to clamp the valve, the distal chuck 63 There is a certain space between the proximal chuck 61 to accommodate the valve for clamping.

As shown in Fig. 6, Fig. 7 and Fig. 8, Fig. 6 is a schematic diagram of the suture device of the valve repair suture device shown in Fig. 2 in a punctured state with a partial structure removed. FIG. 7 is a partial enlarged schematic diagram of the area I shown in FIG. 6. Fig. 8 is a cross-sectional view of the suture device of the valve repair suture device shown in Fig. 2 in a punctured state. The puncture state is that the needle assembly 70 can extend from the proximal chuck 61 into the distal chuck 63 and pass through the lead guide 80, so that the needle assembly 70 drives the artificial chord 200 to puncture the valve and penetrate the lead guide 80. In this embodiment, under the action of the pin control member 131, the pin assembly 70 is forced, and the pin assembly 70 can extend from the proximal chuck 61 into the distal chuck 63 and pass through the lead guide 80.

Please refer to FIGS. 2, 3 and 9 again, the proximal chuck 61 includes a proximal chuck seat 611 and a proximal chuck main body 613 that are fixedly connected. The proximal chuck base 611 is fixedly connected to the distal end of the sheath 30. The proximal chuck seat 611 is located between the proximal chuck body 613 and the sheath 30. The radial dimension of the end of the proximal collet holder 611 connected to the sheath tube 30 is smaller than the radial dimension of the end of the proximal collet holder 611 away from the sheath tube 30. The pin assembly 70 movably passes through the proximal chuck main body 613 and the proximal chuck seat 611.

Specifically, a thread storage tube 6119 is provided in the proximal chuck holder 611, and the suture storage tube 6119 is inserted into the proximal chuck holder 611 to accommodate the artificial chord 200. The suture storage tube 6119 is also threaded through the sheath tube 30.

In this embodiment, the proximal chuck seat 611 is provided with a channel 6113, the proximal chuck main body 613 is provided with a channel 6133 communicating with the channel 6113, and the pin assembly 70 can movably penetrate through the channel 6113 and the channel 6133.

It can be understood that the proximal chuck holder 611 can be omitted, for example, the proximal chuck body 613 is directly fixedly connected to the sheath 30.

Please refer to FIG. 9. FIG. 9 is a three-dimensional exploded schematic view of the suture device shown in FIG. 3.

In this embodiment, the proximal chuck main body 613 is provided with a buckle 6131, the proximal chuck base 611 is provided with a clamping groove 6110, and the proximal chuck body 613 and the proximal chuck base 611 pass through the buckle 6131 and the clamping groove. The 6110 snaps and connects. It can be understood that the connection manner of the proximal chuck holder 611 and the proximal chuck main body 613 is not limited, for example, a threaded connection or a glued connection can be adopted.

The distal chuck 63 includes a distal chuck body 631 and a distal chuck cap 633 that are fixedly connected. The distal collet body 631 is located between the distal collet cap 633 and the proximal collet 61. The distal chuck cap 633 is fixedly connected to the distal end of the chuck push tube 65, and the distal chuck main body 631 is sleeved on the outside of the chuck push tube 65.

It can be understood that the manner in which the distal chuck body 631 and the distal chuck cap 633 are fixedly connected is not limited. For example, threaded connection, glued connection, or snap connection may be adopted.

The adjacent end face of the distal chuck body 631 and the proximal chuck body 613 (that is, the proximal face of the distal chuck body 631) is the first clamping surface 6311, the proximal chuck body 613 and the distal chuck body The adjacent end surface of 631 (that is, the distal end surface of the proximal chuck body 613) is the second clamping surface 6131. The first clamping surface 6311 and the second clamping surface 6131 are opposed to each other and can cooperate with each other to clamp the valve. The first clamping surface 6311 is an inclined surface arranged obliquely with respect to the axial direction of the chuck push tube 65, and the second clamping surface 6131 is an inclined surface arranged obliquely with respect to the axial direction of the chuck push tube 65. Since the opposite end surfaces of the proximal chuck body 613 and the distal chuck body 631 are set to be inclined surfaces, that is, the first clamping surface 6311 and the second clamping surface 6131 are inclined surfaces, so that the clamping assembly 60 increases when clamping the valve. The clamping area of the large distal chuck main body 631 and the proximal chuck main body 613 on the valve improves the stability of the clamping assembly 60 for clamping the valve and reduces damage to the valve.

In this embodiment, the first clamping surface 6311 and the second clamping surface 6131 are concave and convex surfaces that cooperate with each other. The concave-convex surface can increase the friction force when the distal chuck body 631 and the proximal chuck body 613 clamp the valve, and improve the reliability of the distal chuck body 631 and the proximal chuck body 613 when clamping the valve. In this embodiment, both the first clamping surface 6311 and the second clamping surface 6131 include corrugated protrusions.

It can be understood that the first clamping surface 6311 and the second clamping surface 6131 are not restricted to be inclined surfaces arranged obliquely with respect to the axial direction of the chuck push tube 65, and the first clamping surface 6311 and the second clamping surface 6131 are not restricted to be concave and convex surfaces. It is sufficient that the first clamping surface 6311 and the second clamping surface 6131 can clamp or loosen the valve.

An end of the distal chuck main body 631 close to the distal chuck cap 633 (the distal end of the distal chuck main body 631) is provided with a groove 6314, and the lead guide 80 is partially accommodated in the groove 6314.

The groove 6314 includes a groove bottom wall 6317 (also shown in FIG. 8) and a groove side wall 6318 (also shown in FIG. 8) formed by bending and extending from the groove bottom wall 6317, the groove bottom wall 6317 and the distal chuck cap 633 are arranged oppositely, the thread guide 80 is in contact with the bottom wall 6317 of the groove, the bottom wall 6317 of the groove is provided with a through hole 6315 (also shown in FIG. 8), and the chuck push tube 65 is inserted through the through hole 6315.

Please refer to FIG. 3 again. The groove bottom wall 6317 is inclined with respect to the axial direction of the chuck push tube 65, and the included angle between the groove bottom wall 6317 and the end of the chuck push tube 65 away from the proximal chuck cap 611 is an obtuse angle α. That is, the bottom wall 6317 of the groove is an inclined surface arranged obliquely with respect to the end of the chuck push tube 65 away from the proximal chuck cap 611. In this way, it provides guidance for the movement of the thread guide 80 into the chuck push tube 65 and also provides guidance for the pin The assembly 70 is restrained by the thread guide 80 and retracted into the chuck push tube 65 to provide guidance.

As shown in FIG. 9, the distal chuck body 631 is provided with a through hole 6313, and the through hole 6313 communicates with the channel 6133 in the proximal chuck body 613.

The chuck push tube 65 is movably inserted in the proximal chuck seat 611 and the proximal chuck body 613, and the chuck push tube 65 is fixedly pierced in the distal chuck body 631 and the distal chuck cap 633.

As shown in FIG. 8, the chuck push tube 65 is provided with a lateral through hole 651, the lateral through hole 651 is in communication with the groove 6314, and the wire guide 80 is partially movably inserted through the lateral through hole 651 and partially accommodated in the groove 6314 in.

Please refer to Figure 3, Figure 5, Figure 8, Figure 9 and Figure 10, the distal end of the chuck cap 633 facing the distal end of the chuck body 631 (that is, the proximal end of the distal chuck cap 633) is provided with a recess 6330 , The recess 6330 is aligned with the groove 6314. The recess 6330 is used to provide a guide for the pin assembly 70 to be pulled into the chuck push tube 65 while being restrained by the lead guide 80. The bottom of the recess 6330 is also provided with a channel 6331 communicating with the through hole 6313, that is, the channel 6113, the channel 6133, the through hole 6313, and the channel 6331 are sequentially connected to form a channel for the pin assembly 70 to move through. The holes 6313 and the channels 6331 are axially correspondingly arranged. When the valve repair suture device 100 is in the puncture state, the needle assembly 70 can be movably inserted through the channel 6113, the channel 6133, the through hole 6313, and the channel 6331. In this embodiment, the channel 6331 communicates with the through hole 6313 and the groove 6314.

Please refer to FIG. 3 again. The clamping assembly 60 further includes a spacer 66, and the spacer 66 is fixedly connected to the end of the chuck push tube 65 away from the operating body 10. The spacer 66 is fixedly received in the distal chuck cap 633 of the distal chuck 63, and the spacer 66 is fixedly sleeved on the distal end of the chuck push tube 65.

In this embodiment, the spacer 66 is coated with a developing material. The arrangement of the spacer 66 can increase the force-receiving area of the chuck push tube 65 and the distal chuck 63 on the one hand, and on the other hand play a role of visualization, so that the position of the valve suture device 50 can be observed during the operation. In this embodiment, as shown in FIG. 7, the shape of the spacer 66 is a semi-cylindrical shape. It can be understood that the shape of the pad 66 is not limited, for example, a triangle, a square, a trapezoid, or the like can be adopted.

It can be understood that the spacer 66 can be omitted, and the chuck push tube 65 is directly and fixedly connected to the distal chuck cap 633.

Please refer to FIGS. 7 and 9 again. In this embodiment, the clamping assembly 60 further includes a guide rod 67, one end of the guide rod 67 is fixedly connected to the spacer 66, and the guide rod 67 is movably inserted through the proximal chuck body 613 and In the distal chuck main body 631, the guide rod 67 and the chuck push tube 65 are spaced apart. The guide rod 67 is used to provide a guide for the chuck push tube 65 when the chuck push tube 65 drives the distal chuck 63 to move relative to the proximal chuck 61.

In this embodiment, the number of guide rods 67 is two. It can be understood that the number of guide rods 67 is not limited.

Please refer to FIG. 9 again. In this embodiment, the clamping assembly 60 further includes a limiting block 68, which is fixedly connected to the end of the guide rod 67 away from the cushion block 66 (ie, the proximal end of the guide rod 67). The guide rod 67 is located between the spacer block 66 and the limit block 68. The chuck push tube 65 penetrates through the limiting block 68. The limiting block 68 is accommodated in the proximal chuck body 613. The limiting block 68 is used to prevent the guide rod 67 from falling out of the proximal chuck body 613.

It can be understood that the limiting block 68 can be omitted and the guide rod 67 can be set as a telescopic rod, so that the guide rod 67 with telescoping function is directly and fixedly connected with the proximal chuck body 613.

Please refer to FIG. 11. FIG. 11 is a three-dimensional assembly diagram of the thread guide and the lead control member shown in FIG. 3.

The lead wire 80 includes a lead coil 81 and a driver 83 that are fixedly connected. The end of the driver 83 away from the lead coil 81 is connected to the lead controller 132, and the driver 83 is located between the lead coil 81 and the lead coil 81. The axial passage formed by the passage 6331 and the through hole 6313 is located in the lead coil 81. In other words, the proximal chuck 61 and the distal chuck 63 are respectively provided with axial channels aligned with each other for the insertion of the needle assembly 70 and the artificial chord 200, and the axial channels in the distal chuck 63 communicate with each other. The slot 6314 is located in the lead coil 81.

As shown in FIG. 3, the driving member 83 is movably installed in the chuck push tube 65. The lead coil 81 is movably received between the distal chuck main body 631 and the distal chuck cap 633, and the lead coil 81 is movably inserted in the lateral through hole 651 and received in the groove 6314. The lead coil 81 is used to restrain the artificial chord 200 when the driving member 83 is retracted in the chuck push tube 65 toward the proximal direction.

Please refer to FIG. 12. FIG. 12 is a schematic diagram of the assembly of the distal chuck body of the suture device and the lead guide shown in FIG. 3.

The lead coil 81 includes a protruding portion 812 and a connecting portion 813. The connecting portion 813 is fixedly connected to both sides of the protruding portion 812. The end of the connecting portion 813 away from the protruding portion 812 is fixedly connected to the driving member 83. The connecting portion 813 is located between the protruding portion 812 and Between the driver 83. The protrusion 812 is used for facilitating the binding of the artificial chord 200 (as shown in FIG. 5 ), so as to prevent the artificial chord 200 from falling off the lead coil 81.

In this embodiment, the lead coil 81 expands in a substantially fan shape from the connecting end of the lead coil 81 to the driving element 83 in a direction away from the connecting end. The lead diameter of the lead coil 81 is smaller than the depth of the groove 6314.

In this embodiment, the shape of the protrusion 812 is a half ring. It can be understood that the shape of the protrusion 812 is not limited, and it is sufficient to lock the artificial tendon 200 when the lead coil 81 is tightened so that the artificial tendon 200 will not fall off from the lead coil 81. For example, the shape of the protrusion 812 can be It is provided as a triangular protrusion or the like; the protrusion 812 may also be omitted.

Please refer to FIG. 3 again. The lead coil 81 is pre-shaped, so that the lead coil 81 is warped relative to the driving member 83 when the lead coil 81 is not subject to external force. The lead coil 81 is arranged obliquely with respect to the driver 83, and the included angle β between the lead coil 81 and the driver 83 is an obtuse angle.

In other words, before the lead coil 81 binds the artificial tendon 200 and pulls the artificial tendon 200 back in the proximal direction, the angle between the lead coil 81 and the driver 83 is an obtuse angle, and the lead coil 81 is attached to the bottom wall of the groove. 6317 and the side wall 6318 of the slot, so that it is convenient for the lead coil 81 to be withdrawn into the chuck push tube 65.

In this embodiment, the lead coil 81 is made of Nitinol wire. It can be understood that the material of the lead coil 81 is not limited. The expanded shape of the lead coil 81 is not limited.

Please refer to FIG. 3 again. The pin assembly 70 includes a pin push tube 71 and a pin 73. The pin push tube 71 is connected to the pin control part 131 (as shown in FIG. 2), and the pin 73 is located in the pin push tube 71. One end away from the pin control member 131 (that is, the distal end of the pin push tube 71), the distal end of the pin push tube 71 can push against the proximal end of the pin 73, and the pin push tube 71 is located between the pin 73 and the pin Between the control pieces 131. The pin push tube 71 and the pin 73 are movably installed in the proximal chuck body 613 and the proximal chuck seat 611. The needle 73 is used to puncture the valve. The end adjacent to the pin 73 and the pin push tube 71 is used to fix and connect the artificial tendon 200, and the pin push tube 71 is used to push the pin 73.

Please refer to FIG. 13, which is a three-dimensional schematic diagram of the needle assembly and artificial tendon of the suture device shown in FIG. 3 being assembled together.

The outer diameter of the pin 73 is approximately the same as the outer diameter of the pin push tube 71 to facilitate the pin push tube 71 to push the pin 73. The pin 73 and the pin push tube 71 can contact each other but are not fixedly connected. It can be understood that the outer diameter of the pin 73 and the outer diameter of the pin push tube 71 are not limited.

In this embodiment, the needle 73 includes a needle tube 731 and a needle 733 that are integrally connected. The needle tube 731 is disposed close to the needle push tube 71, the needle 733 is located at the distal end of the needle tube 731, and the needle tube 731 of the needle 73 is tubular.

The needle 733 of the insertion needle 73 is a beveled tip, which can reduce the puncture point and reduce the damage to the valve compared with the existing hook needle. It can be understood that the needle 733 of the insert needle 73 is not limited to a beveled tip, and it is sufficient to facilitate the puncture of the insert needle 73 and reduce damage to the valve. For example, the needle 733 of the insert needle 73 can be configured as a tapered tip. It can be understood that the material of the pin 73 is not limited. For example, the material of the pin 73 may be, but is not limited to, stainless steel or the like.

In this embodiment, the number of pins 73 is two, and the number of pin push tubes 71 corresponds to two.

It can be understood that the number of the pins 73 and the pin push tube 71 is not limited, for example, the number of the pins 73 and the pin push tube 71 can be 1, 3, 4, and so on.

As shown in FIG. 14, the pin assembly 70 further includes a pin catheter 75 (see also FIG. 3 ). The pin catheter 75 is fixedly inserted into the proximal chuck body 613 and the proximal chuck seat 611. The insertion needle 73 and the insertion needle push tube 71 can be movably inserted into the insertion needle catheter 75. The pin guide 75 is used to guide the movement of the pin 73 and the pin push tube 71.

It is understood that the needle catheter 75 can be omitted. For example, the inner wall of the through hole 6133 of the proximal chuck body 613 can be matched with the outer walls of the pin push tube 71 and the pin 73 to guide the movement of the pin 73 and the pin push tube 71 in the proximal chuck 61 That's it.

Please refer to Figure 15. Figure 15 is a cross-sectional view of the pin assembly. In this embodiment, the cross section of the distal end of the needle push tube 71 is roughly a half-packed C-shaped groove structure for accommodating the end of the artificial chord 200. In this way, the obstacle to the puncture valve when the artificial chord 200 is exposed outside the needle insertion tube 71 is reduced, and it is also convenient to place the artificial chord 200 in the needle insertion tube 71. It can be understood that the shape of the cross section of the pin push tube 71 is not limited. For example, it can be set in a "匚" shape, a "mouth" shape, a V shape, etc., but is not limited to.

Please refer to Figure 16 and Figure 17. Figure 16 is a perspective view of the needle assembly and artificial tendon of the suture device shown in Figure 6 assembled together, and Figure 17 is another perspective of the needle assembly and artificial tendon of Figure 16 Schematic diagram.

Under the action of the pin control member 131 (as shown in FIG. 2 ), the pin push tube 71 pushes the pin 73 to move away from the pin control member 131.

Please refer to FIG. 18. FIG. 18 is a perspective view of the artificial chord and the pin assembled together according to the first embodiment.

In this embodiment, the number of pins 73 is two. The artificial chord 200 includes a first fixed end 201, a second fixed end 203 and a chord main body 205. The chord main body 205 is fixedly connected between the first fixed end 201 and the second fixed end 203. The first fixed end 201 and the second fixed end 203 are respectively fixedly connected to a pin 73. The chordae main body 205 is used to replace the dysfunctional chordae. As shown in FIG. 3, the artificial chord 200 is accommodated in the proximal chuck body 613 and the proximal chuck seat 611.

In this embodiment, the chord main body 205 is bent into a "U" shape, and the first fixed end 201 and the second fixed end 203 are respectively fixedly connected to the pin 73. In this way, when the first fixed end 201 and the second fixed end 203 are drawn by the needle 73 to puncture the valve from the atrium side to the ventricle side, the bent part of the chordae 205 is finally pulled to the side that contacts the valve near the atrium, so that A part of the artificial chordae 200 is confined to the side of the valve close to the atrium, and provides a starting end for the subsequent artificial chordae 200 to extend along the side of the ventricle and be fixed to the ventricular wall or papillary muscle.

In this embodiment, the two ends of an artificial tendon 200 after being folded in half are the first fixed end 201 and the second fixed end 203, and the remaining part is the tendon main body 205, and the tendon main body 205 is accommodated in the slit. Line storage tube 6119. Two ends of the artificial tendon 200 are respectively threaded through a needle tube 731, and the corresponding needle tube 731 is clamped by a wire clamp to respectively fix the first fixed end 201 and the second fixed end 203 with a pin 73 correspondingly. It can be understood that the connection manner of the artificial chord 200 and the pin 73 is not limited, for example, the connection can be but not limited to by gluing.

In this embodiment, the artificial chord 200 is made of sutures. The sutures can be made of a smooth material, such as polytetrafluoroethylene (PTFE), or a non-smooth material, such as polyester resin (polyethylene terephthalate). , Referred to as PET). When the suture is made of smooth material such as PTFE, the crimping pliers need to clamp the pin 73 and the suture with greater force, so that when the artificial tendon 200 is pulled by the lead coil 81, the proximal end of the pin 73 is stuck The lead coil 81, the lead coil 81 drives the artificial tendon 200 together with the pin 73 to be withdrawn from the body through the chuck push tube 65; when the artificial tendon 200 is made of a relatively non-smooth material such as PET, the clamp is smaller Clamp the pin 73 and the artificial tendon 200 with force. The channel 6331 in the distal chuck cap 633 will form a tight fit with the pin 73 when the pin 73 is inserted. When the artificial tendon 200 is pulled by the lead loop 81, the artificial tendon 200 can be separated from the pin 73, and the friction between the artificial tendon 200 and the lead coil 81 is relatively large, and the lead coil 81 only drives the artificial tendon 200 to withdraw from the body through the chuck push tube 65.

It can be understood that the above two materials are only exemplary and do not constitute a limitation of the present application. The artificial tendon 200 may also be made of other materials.

In this embodiment, a gasket 210 is passed through the artificial tendon 200, and the gasket 210 is provided with two through holes 211 for the first fixed end 201 and the second fixed end 203 to pass through, and the gasket 210 is used for The contact area when the bending part of the chordae main body 205 contacts the valve is increased to reduce damage to the valve. In other words, a spacer 210 is worn on the artificial chord 200, and the spacer 210 is movably accommodated in the proximal chuck 61. When the part of the artificial chord 200 is confined to the side of the valve close to the atrium, the pad 210 The sheet 210 is located between the part of the artificial chordae 200 and the side of the valve close to the atrium.

In this embodiment, the gasket 210 is provided with an arc protruding toward the bending part of the chordae main body 205, so that the gasket 210 can better fit the valve. It can be understood that the curvature of the gasket 210 is better to fit the valve to the greatest extent.

It can be understood that the material of the gasket 210 is not limited. For example, the material of the gasket 210 may be, but not limited to, polyester cloth, polytetrafluoroethylene (PTFE), polyester resin (polyethylene terephthalate, PET), etc. It can be understood that the gasket 210 may be omitted.

In this embodiment, in conjunction with FIG. 8, FIG. 9 and FIG. 13, the proximal chuck main body 613 is further provided with a receiving portion 6134 for receiving the gasket 210. The accommodating portion 6134 communicates with the through hole 6133 through which the pin assembly 70 is inserted as a whole. Preferably, the gasket 210 is accommodated in the accommodating portion 6134 in a posture parallel to the axial direction.

As shown in Figure 8, during the specific use process of the valve repair suture device 100, the needle 73 is pushed by the needle push tube 71 to pull the artificial chord 200 to puncture the valve and pass through the lead coil 81. The lead coil 81 is in Driven by the driving member 83, it withdraws downwards, and then tightens to restrain the needle 73 and the artificial chord 200, and drives the needle 73 and the artificial chord 200 to withdraw until the gasket 210 fits the side of the valve close to the atrium, so that the artificial The chordae 200 portion is confined to the side of the valve near the atrium.

Please refer to Figure 2, Figure 3 and Figure 9 again, the valve repair suture device 100 further includes a probe 90, which is movably inserted through the proximal chuck body 611 and the proximal chuck seat 613, and the probe 90 is located Between the chuck push tube 65 and the pin assembly 70, the probe 90 and the chuck push tube 65 are spaced apart. The operating body 10 is provided with a probe control member 135 which is connected to the proximal end of the probe 90 for controlling the movement of the probe 90.

The sheath 30 is fixedly connected between the operating body 10 and the proximal chuck base 611, and is used for accommodating the suture storage tube 6119, the needle assembly 70, the probe 90, the needle assembly 70 and the chuck push tube 65.

Please refer to FIG. 19, which is a schematic cross-sectional view of the sheath of the valve repair suture device shown in FIG. 2.

The suture storage tube 6119 is inserted through the sheath 30, the needle catheter 75 is inserted through the sheath 30, the probe 90 is movably inserted through the sheath 30, and the chuck push tube 65 is movably inserted through the sheath 30 , The suture storage tube 6119, the needle catheter 75, the probe 90, and the chuck push tube 65 are all spaced apart in the sheath 30.

It can be understood that the cross-section of the sheath tube 30 is not restricted to be substantially circular; the length of the sheath tube 30 along its axial direction is not restricted, and the length of the sheath tube 30 is only required to meet the operation requirements.

As shown in FIG. 3, the radial dimension of the proximal chuck holder 611 gradually increases from the proximal end to the distal end from the adaptable sheath 30 to accommodate the proximal chuck body 613, in order to match the proximal chuck holder 611 from the proximal end When the size of the distal end changes, the needle push tube 71 is provided with an inclined section adapted to the size change of the proximal collet holder 611. The push tube passage 75 is provided with an inclined section adapted to the size change of the proximal chuck seat 611, and the chuck push tube 65 is also provided with an inclined section adapted to the size change of the proximal chuck seat 611.

In an application scenario, the valve repair suture device is used to treat tricuspid regurgitation (TV as shown in FIG. 1). Please refer to Fig. 20, the valve suture device 50 enters the right atrium (RA shown in Fig. 20) and the right ventricle (RV shown in Fig. 20) sequentially through the inferior vena cava (IVC as shown in Fig. 20) via the catheter route. The proximal chuck 61 is located on the atrial side and the distal chuck 63 is located on the ventricle side, and the two clamp the valve. Before the needle 73 of the valve suture device 50 punctures the valve, the needle assembly 70 and the artificial chord 200 are accommodated on one side of the proximal chuck 61, and the lead coil 81 of the lead device 80 is accommodated in the distal chuck 63 In the groove 6314. The needle assembly 70 pulls the artificial chord 200 (as shown in Figure 3) from the atrium side to the ventricle side to puncture the valve and then pass through the introducer 80. The drive member 83 is retracted in the chuck push tube 65 toward the proximal direction to drive The lead coil 81 tightens and binds the artificial chord 200 and pulls the artificial chord 200 and the pin 73 into the chuck push tube 65, so that the part of the artificial chord 200 is limited to the side of the valve near the atrium. The artificial chord 200 The part of the artificial chordae 200 can be penetrated from the side of the valve close to the ventricle and can extend toward the ventricle side, and then the part of the artificial chordae 200 away from the valve can be fixed to the ventricular wall or papillary muscle on the side of the ventricle through an anchoring operation, thereby achieving transcatheter Way of artificial chord implantation and heart valve repair.

In an application scenario, the valve suture device 50 is used to treat the tricuspid valve (TV as shown in Figure 1) regurgitation through the catheter approach, and it can also enter the right atrium through the superior vena cava (SVC as shown in Figure 20) in turn (as shown in Figure 20). Show RA) and right ventricle (RV shown in Figure 20) to reach the tricuspid valve position.

In an application scenario, a valve repair suture device is used to treat mitral valve regurgitation (MV as shown in Figure 1). Please refer to Figure 21, the valve suture device 50 passes through the inferior vena cava (IVC as shown in Figure 21) through the catheter to enter the right atrium (RA as shown in Figure 21), and then punctures the fossa ovale (Figure 21) Shown FO), enter the left atrium (LA as shown in Figure 21) and left ventricle (LV as shown in Figure 21) in sequence to reach the position of the mitral valve.

In an application scenario, the valve suture device 50 is used to treat the mitral valve (MV as shown in Figure 1) regurgitation through the catheter approach, and it can also enter the right atrium through the superior vena cava (SVC as shown in Figure 21) first (as shown in Figure 21). Show RA), then puncture the fossa ovale (FO as shown in Figure 21), enter the left atrium (LA as shown in Figure 21) and left ventricle (LV as shown in Figure 21) in order to reach the position of the mitral valve .

In a specific embodiment, as shown in FIG. 20, taking the treatment of the tricuspid valve (TV shown in FIG. 1) as an example, the specific use process of the valve repair suture device is introduced. Insert the valve suture device 50 of the valve repair suture device 100 through the inferior vena cava (IVC as shown in FIG. 20) into the right atrium (RA as shown in FIG. 20) and the right ventricle (RV as shown in FIG. 20) in turn. The end chuck 61 is located on the atrium side, and the distal chuck 63 is located on the ventricle side.

As shown in FIG. 22, the proximal chuck 61 and the distal chuck 63 are relatively opened under the drive of the chuck push tube 65. After the proximal chuck 61 and the distal chuck 63 clamp the valve under the drive of the chuck push tube 65 (shown as V in FIG. 22), they are detected by the probe 90 to confirm whether the valve is effectively clamped.

As shown in FIGS. 23 and 24, when the probe 90 confirms that the valve has been effectively clamped, the needle 73 is pushed by the needle push tube 71 (as shown in FIG. 3) to puncture from the atrial side to the ventricle side. The insert needle 73 drives the artificial chordae 200 to puncture the valve and pass through the lead coil 81, and the insert needle 73 and the artificial chordae 200 enter the distal chuck 63. Then the pin push tube 71 is withdrawn, and the pin 73 is separated from the pin push tube 71.

As shown in Figures 25 and 26, the driving member 83 is retracted toward the proximal direction, and the lead coil 81 is gradually tightened under the driving of the driving member 83, pulling the artificial tendon 200 and the pin 73 into the chuck push tube 65 and inserting The needle 73 slides into the chuck push tube 65 along the bottom wall of the recess 6330 (as shown in FIG. 10).

As shown in Figures 27 and 28, the lead coil 81 continues to withdraw to withdraw the artificial chord 200 and the pin 73 along the chuck push tube 65 toward the proximal direction, and the chord main body 205 of the artificial chord 200 shim 210 Take out from the accommodating portion 6134 (as shown in FIG. 18), the gasket 210 is brought into contact with the side of the valve close to the atrium, and the bending part of the artificial chordae 200 is limited to the side of the valve close to the atrium.

As shown in Figure 29, the gasket 210 contacts the surface of the valve on the atrial side, that is, the gasket 210 is located on the atrial side, so that the artificial chordae 200 is passed out from the ventricular side and extends toward the ventricular side, and then the valve suture device 50 ( As shown in Figure 4) and sheath 30 (as shown in Figure 4).

As shown in Fig. 30, since the bent part of the chordae main body 205 is finally pulled to contact the side of the valve near the atrium, the part of the artificial chord 200 is limited to the side of the valve near the atrium, which is an artificial tendon. The cord 200 extends along the side of the ventricle to provide the starting end. After adjusting the artificial chord 200 to make the regurgitation in the lightest state, fix the part of the artificial chord 200 away from the valve to the ventricular wall or papillary muscle through the anchor 600 to complete it. The implantation of the artificial tendon 200 is completed.

Second embodiment

Please refer to FIG. 31. FIG. 31 is a schematic diagram of the assembly of the artificial chord and the pin provided by the second embodiment of the application.

The artificial chord 300 provided in the second embodiment includes a first fixed end 301, a second fixed end 303, a chord main body 305 and a stopper 307. The chord main body 305 is fixedly connected between the first fixing end 301 and the second fixing end 303, and a gasket 310 is passed through the main chord 305. The second fixed end 303 is fixedly connected to the pin 73, and the end of the first fixed end 301 away from the tendon main body 305 is fixedly connected to the limiting member 307. The gasket 310 is provided with a through hole 311, and the chord main body 305 is inserted through the through hole 311. In this embodiment, the limiting member 307 is a spherical body, and the diameter of the limiting member 307 is larger than the diameter of the through hole 311.

In a specific embodiment, the insertion needle 73 drives the chordal main body 305 of the artificial chordal 300 to puncture the valve from the atrium side to the ventricular side. The stopper 307 compresses the spacer 310 so that the spacer 310 is in contact with the valve, thereby limiting the first fixed end 301 of the artificial chordae 300 on the side of the valve close to the atrium, so that the artificial chordae 200 extends along the side of the ventricle. Starting end.

The third embodiment

As shown in FIG. 32, FIG. 32 is a three-dimensional assembly diagram of the valve repair suture device provided by the third embodiment of the application.

The valve repair suture device 400 includes a base 90 fixedly connected to the operating body 10 and used to carry the operating body 10.

It can be understood that the base 90 can be omitted, and the operating body 10 can be held by human hands instead.

The above-disclosed are only the preferred embodiments of the present invention, which of course cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

A valve suture device for implanting artificial chordae, which is characterized by comprising a clamping assembly, a needle assembly and a lead guide; the clamping assembly includes a proximal clamp, a clamp push tube and a distal clamp The chuck push tube is movably inserted in the proximal chuck and fixedly connected to the distal chuck, and the chuck push tube is used to drive the distal chuck relative to the proximal chuck Move to clamp or loosen the valve; the needle assembly is movably inserted into the proximal chuck and connected to the artificial chord which is contained in the proximal chuck, and the guide is movably inserted in In the chuck push tube and the distal chuck, the insertion needle assembly is used to pull the artificial chordae from the atrium side to the ventricle side to puncture the valve and penetrate into the lead guide, and the lead guide is used for binding The artificial chordae is pulled into the chuck push tube and withdrawn toward the proximal direction, so that the part of the artificial chordae is limited to the side of the valve close to the atrium.
The valve suture device according to claim 1, wherein the lead guide comprises a driver and a lead coil, the lead coil is fixedly connected to the distal end of the driver, and the driver is movably installed on the In the chuck push tube, the lead coil is movably accommodated in the distal chuck; when the drive member retracts toward the proximal direction in the chuck push tube, the lead coil is driven to restrain the The artificial tendon is pulled and the artificial tendon is pulled back toward the proximal direction.
The valve suture device according to claim 2, wherein the lead coil comprises a protrusion and a connecting part fixedly connected to both sides of the protrusion, and the connecting part is far away from the end of the protrusion and The driving member is fixedly connected, and the protrusion is used to bind the artificial tendon.
The valve suture device according to claim 2, wherein the lead coil is subjected to a predetermined type treatment, and the lead coil binds the artificial chordae and pulls the artificial chordae before withdrawing in the proximal direction, The included angle between the lead coil and the driving element is an obtuse angle.
The valve suture device according to claim 2, wherein the distal chuck comprises a distal chuck body and a distal chuck cap fixedly connected to the distal chuck body, and the distal chuck The head cap is fixedly connected to the distal end of the chuck push tube, the distal chuck body is located between the distal chuck cap and the proximal chuck, and the lead coil is movably accommodated in the Between the distal chuck body and the distal chuck cap.
The valve suture device according to claim 5, wherein the distal chuck main body is provided with a groove on a side close to the distal chuck cap, and the lead coil is movably received in the concave内槽。 In the slot.
The valve suture device according to claim 6, wherein the groove comprises a groove bottom wall and a groove side wall connected to the groove bottom wall, and the groove bottom wall and the distal collet cap Oppositely arranged, the lead coil is in contact with the bottom wall of the groove, the bottom wall of the groove is provided with a through hole, the chuck push tube movably penetrates the through hole of the bottom wall of the groove, and the chuck A part of the push tube close to the distal end chuck cap is provided with a lateral through hole, the lateral through hole communicates with the groove, and the lead coil is movably inserted through the lateral through hole.
The valve suture device according to claim 7, wherein the bottom wall of the groove is arranged obliquely with respect to the push tube of the chuck, and the bottom wall of the groove and the push tube of the chuck are away from the distal chuck. The angle between the ends of the cap is an obtuse angle.
The valve suture device according to claim 6, wherein the proximal chuck and the distal chuck body are respectively provided with axial channels aligned with each other for the insertion needle assembly and the artificial The chordae is inserted, and the axial channel in the distal chuck body communicates with the groove and is located in the lead coil.
The valve suture device according to claim 5, wherein the side of the distal chuck main body close to the proximal chuck includes a first clamping surface that is arranged obliquely with respect to the chuck push tube, A side of the proximal chuck close to the distal chuck includes a second clamping surface arranged obliquely with respect to the chuck push tube, and the first clamping surface and the second clamping surface cooperate with each other .
The valve suture device according to claim 1, wherein the needle assembly includes a needle push tube and a needle, and the needle push tube and the needle are both movably pierced through the proximal end In the chuck, the distal end of the pin push tube pushes against the proximal end of the pin, the pin is connected to the artificial chord, and the pin push tube is used to push the pin.
The valve suture device of claim 11, wherein the needle assembly further comprises a needle catheter, the needle catheter is fixedly inserted into the proximal chuck, and the needle and the insert The needle pushing tube can be movably inserted into the needle catheter.
The valve suture device according to claim 1, wherein a gasket is worn on the artificial chord, and the gasket is movably accommodated in the proximal chuck, and a part of the artificial chord When confined to the side of the valve close to the atrium, the spacer is located between the part of the artificial chordae and the side of the valve close to the atrium.
The valve suture device according to claim 1, wherein the clamping assembly further comprises a cushion block, the cushion block is fixedly received in the distal chuck, and the cushion block is fixedly sleeved in the distal end chuck. The chuck pushes the distal end of the tube.
The valve suture device of claim 14, wherein the spacer includes a developing material.
The valve suture device of claim 14, wherein the clamping assembly further comprises a guide rod movably inserted in the proximal chuck, and the distal end of the guide rod is fixed to the pad On the block, the guide rod and the chuck push tube are arranged at intervals.
The valve suture device of claim 1, further comprising a probe movably inserted in the proximal chuck, and the probe is located between the chuck push tube and the pin assembly In between, the probe and the chuck push tube are spaced apart.
A suture device for valve repair, which is characterized by comprising the valve suture device and an operating body according to any one of claims 1-17, and the operating body is provided with a needle control member, a lead control member and a chuck A control member, the pin control member is connected with the proximal end of the pin assembly to control the axial movement of the pin assembly, and the lead control member is connected with the proximal end of the lead guide to control the lead The chuck is moved along the axial direction, and the chuck control member is connected with the proximal end of the chuck push tube to control the chuck push tube to move in the axial direction.
The valve repair suture device according to claim 18, further comprising a sheath, the sheath is fixedly connected between the operating body and the proximal chuck, the chuck push tube, The thread guide and the pin assembly are movably installed in the sheath.
The valve repair suture device according to claim 18, further comprising a base fixedly connected to the operating body for supporting the operating body.