Valve ring retraction instrument

Abstract

The invention relates to the technical field of medical instruments, in particular to a valve ring contraction instrument which comprises a main body arm, a first clamping arm and a second clamping arm. The first clamping arm is rotatably connected with the main body arm; the second clamping arm is rotatably connected with the main body arm; the first clamping arm is provided with a first puncture channel, and the second clamping arm is provided with a second puncture channel; the valve ring contraction instrument further comprises a puncture needle and a traction piece, and the puncture needle can be connected with the suture through the traction piece. When the first clamping arm and the second clamping arm are in a clamping state, the traction piece can pull the suture to penetrate out of the first puncture channel along with the puncture needle through the second puncture channel. The valve ring retraction instrument has the advantages of being simple in structure, accurate in positioning, convenient to operate, safe to use and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a valve ring contraction device. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] The mitral valve is an important part of the heart, located between the left atrium and the left ventricle. When the heart is working, blood is pumped from the left atrium to the left ventricle. When the left ventricle contracts to pump blood to the whole body, the mitral valve closes to prevent blood from flowing back into the left atrium. Diseases such as ischemic heart disease or dilated cardiomyopathy can cause the left ventricle or left atrium to become larger, leading to dilation of the mitral valve ring. In this case, when the left ventricle contracts, the anterior and posterior leaflets of the mitral valve cannot be joined, causing problems such as reflux and leakage.

[0004] The most common method to repair damaged mitral valve function is valve replacement or valve repair through surgery. These surgeries are highly invasive and require an opening in the patient's chest to perform the operation. At the same time, the blood needs to be circulated outside the body. Since patients with impaired mitral valve function are often relatively fragile, the surgical risk is relatively high. In addition, minimally invasive valve ring reduction surgery started late, and the minimally invasive surgical instruments that have been proposed for valve ring reduction surgery have defects such as difficulty in operation. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing valve ring shrinkage device is difficult to operate. This purpose is achieved through the following technical solutions:

[0006] The present application provides a valve ring retraction device, including a main arm, a first clamping arm and a second clamping arm; the first clamping arm is rotatably connected to the main arm; the second clamping arm is rotatably connected to the main arm; the first clamping arm is provided with a first puncture channel, and the second clamping arm is provided with a second puncture channel; the valve ring retraction device also includes a puncture needle and a traction member, and the puncture needle can be connected to the suture via the traction member; the valve ring retraction device is configured so that when the first clamping arm and the second clamping arm are in a clamping state, the traction member can pull the suture along with the puncture needle through the second puncture channel to pass through the first puncture channel.

[0007] The present application enables the valve ring shrinkage instrument to include a first clamping arm and a second clamping arm, so that during the valve ring shrinkage operation, the designated position of the valve ring can be clamped by the first clamping arm and the second clamping arm, and the designated position of the valve ring can be clamped accurately and quickly. Since the valve ring shrinkage instrument captures the designated position of the valve ring in a clamping manner, this capturing method is not only convenient for in vitro manipulation, but also convenient for adjusting the capture position. In addition, since the valve ring is in a clamped state during the operation, the valve ring position targeted during the operation can be effectively prevented from shifting, which facilitates targeted operations on the clamping position of the valve ring, thereby effectively reducing the difficulty of the operation and improving the efficiency and success rate of the operation.

[0008] In addition, the present application sets a first puncture channel on the first clamping arm and a second puncture channel on the second clamping arm. When the first clamping arm and the second clamping arm are in a clamping state, the puncture end of the puncture needle can pass through the first puncture channel through the second puncture channel. Under the action of the first puncture channel and the second puncture channel, it is convenient for the puncture needle to perform a puncture operation on the clamped tissue. Not only that, under the action of the first clamping arm and the second clamping arm, the puncture wound of the clamped tissue by the puncture needle is smaller, which can effectively reduce the risk of valve ring tearing due to improper operation and improve the safety and reliability of valve ring reduction surgery.

[0009] In the present application, the valve ring contraction device includes a traction member, and the traction member can pull the suture along with the puncture needle through the second puncture channel to pass through the first puncture channel, thereby further connecting the suture to the valve ring.

[0010] In addition, the valve ring shrinking device according to the present application may also have the following additional technical features:

[0011] As some preferred embodiments of the present application, the valve ring contraction device further selectively includes a suture, and the puncture needle is connected to the suture via a traction member; the traction member and the puncture needle have a connected state when the traction member is pulled and a separated state after passing through the first puncture channel.

[0012] The present application enables the traction member and the puncture needle to have a connected state when the traction member is pulled and a separated state after passing through the first puncture channel, thereby enabling the puncture needle to be connected or separated from the traction member according to actual needs; when the traction member and the puncture needle pass through the first puncture channel, the traction member is separated from the puncture needle to facilitate the connection of the traction member with the first clamping arm.

[0013] As some preferred embodiments of the present application, the first puncture channel is further selectively made to pass through the clamping portion of the first clamping arm along the puncture direction of the puncture needle; the second puncture channel extends from the first end of the second clamping arm to the clamping portion of the second clamping arm, and the second puncture channel passes through both ends of the second clamping arm; when the first clamping arm and the second clamping arm are in a clamping state, the first puncture channel is opposite to the second puncture channel.

[0014] As some preferred embodiments of the present application, the first puncture channel is further selectively set to be tapered along the puncture direction of the puncture needle. The present application makes the first puncture channel tapered along the puncture direction of the puncture needle. Under the action of the first puncture channel, the puncture needle can be positioned, restricted and guided, so that the puncture position of the puncture needle is more accurate, and it is also convenient for the puncture end of the puncture needle to pass through the first puncture channel, so as to reduce the difficulty of puncture by the puncture needle.

[0015] As some preferred embodiments of the present application, a limiting structure for connecting the valve ring is further selectively provided on the suture, a traction portion for connecting the first clamping arm is provided at the first end of the traction piece, the puncture needle can be connected to the traction piece via the traction portion, a traction ring for connecting the suture is provided at the second end of the traction piece, the suture is connected to the traction piece via the traction ring, and the traction portion can pass through the first puncture channel with the puncture needle and be connected to the first clamping arm.

[0016] The present application provides a limiting structure on the suture, so that the suture can be securely connected to the valve ring, and the suture can be prevented from being pulled off the valve ring during the traction process of the first clamping arm. In addition, the present application provides a traction part on the first end of the traction member, and a traction ring on the second end of the traction member; thereby, the puncture needle can pull the suture through the traction member, and the limiting structure can be quickly put in place during the operation.

[0017] As some preferred embodiments of the present application, the puncture needle is further selectively made into a hollow needle, and the traction part can be adaptably connected to the hollow needle; when the puncture needle and the traction part are in a connected state, at least part of the traction part is located inside the puncture end of the puncture needle; the valve ring shrinkage device also includes a pushing member, which extends from the proximal end of the hollow needle, and the pushing member can push the traction part so that the traction part can be separated from the puncture needle and connected to the first clamping arm.

[0018] The present application can release the connection between the puncture needle and the traction part by setting a pushing member, and connect the traction part to the clamping part of the first clamping arm, so that the first clamping arm can pull the suture, which is convenient for the smooth implementation of the valve ring reduction operation. In addition, the above-mentioned setting method can also make the puncture needle firmly connected to the traction part during the puncture process, and also facilitate the separation of the puncture needle from the suture. In addition, it also has the advantages of simple structure and easy operation.

[0019] As some preferred embodiments of the present application, a limiting structure mounting position is further selectively provided at a position adjacent to the clamping portion of the second clamping arm, the limiting structure can be connected to the limiting structure mounting position, and the limiting structure is configured so that when the traction member is pulled by the first clamping arm, the limiting structure can be disconnected from the limiting structure mounting position.

[0020] The present application provides a position-limiting structure installation position adjacent to the clamping portion of the second clamping arm, and enables the position-limiting structure to be connected to the position-limiting structure installation position, thereby making the position-limiting structure connected to the suture closer to the clamped tissue, thereby preventing the position-limiting structure from hooking with nearby body tissue as much as possible, and making the valve ring contraction device safer to use. Moreover, under the traction of the traction member, the position-limiting structure can also be quickly put into place.

[0021] As some preferred embodiments of the present application, a first clamping surface is further selectively provided on the clamping portion of the first clamping arm, and a second clamping surface is provided on the clamping portion of the second clamping arm; the first puncture channel passes through the first clamping surface; the second clamping surface is located at the end surface of the second end of the second clamping arm, and the second puncture channel passes through the second clamping surface; when the first clamping arm and the second clamping arm are in a clamping state, the first puncture channel is opposite to the second puncture channel.

[0022] The present application allows the first puncture channel to pass through the first clamping surface, and the second puncture channel to pass through the second clamping surface, so that the puncture needle can pass through the tissue between the first clamping surface and the second clamping surface. Under the action of the first clamping surface and the second clamping surface, the position of the clamped valve ring can be better constrained, making the puncture position more accurate and effectively reducing the damage to the valve ring caused by the puncture needle during the puncture process.

[0023] As some preferred embodiments of the present application, the first end of the first clamping arm is further selectively hinged to the main arm, and the second end of the first clamping arm is bent toward the second clamping arm; and / or the first end of the second clamping arm is hinged to the main arm, and the second end of the second clamping arm is bent toward the first clamping arm.

[0024] As some preferred embodiments of the present application, a first yield area is further selectively provided on the side wall of the main arm, the first clamping arm is adapted to the first yield area, a first connecting position is provided at the proximal end of the first yield area, the first end of the first clamping arm is hinged to the first connecting position, the clamping portion of the first clamping arm is located at the second end of the first clamping arm, and the first clamping arm has a state of being located in the first yield area and a state of extending out of the first yield area after rotation for clamping the valve ring.

[0025] As some preferred embodiments of the present application, a second yield area is further selectively provided on the side wall of the main arm, the second clamping arm is adapted to the second yield area, a second connecting position is provided at the proximal end of the second yield area, the first end of the second clamping arm is hinged to the second connecting position, the clamping portion of the second clamping arm is located at the second end of the second clamping arm, the second clamping arm has a state of being located in the second yield area and a state of extending out of the second yield area after rotation for clamping the valve ring; the first yield area is arranged between the distal end of the main arm and the second yield area.

[0026] The present application provides a first yield area and a second yield area on the side wall of the main arm, and enables the first clamping arm to have a state of being located in the first yield area and a state of extending out of the first yield area after rotation for clamping the valve ring, and enables the second clamping arm to have a state of being located in the second yield area and a state of extending out of the second yield area after rotation for clamping the valve ring; thereby, the valve ring retraction instrument has a folding function, which facilitates the valve ring retraction instrument to be inserted into the heart through minimally invasive surgery and to be adjusted as needed during use.

[0027] As some preferred embodiments of the present application, the valve ring retraction instrument further selectively includes a first operating member for controlling the rotation of the first clamping arm; a first channel is provided on the main arm, connecting the proximal end of the main arm and the connection between the first clamping arm and the main arm, and the first operating member is connected to the first clamping arm through the first channel; the valve ring retraction instrument also includes a second operating member for controlling the rotation of the second clamping arm; a second channel is provided on the main arm, connecting the proximal end of the main arm and the connection between the second clamping arm and the main arm, and the second operating member is connected to the second clamping arm through the second channel.

[0028] The present application enables the valve ring contraction device to include a first control member, and the first control member is connected to the first clamping arm, so that the first clamping arm can be controlled by controlling the first control member, which is not only convenient to control, but also has the advantages of simple structure, etc. Similarly, the valve ring contraction device includes a second control member, and the second control member is connected to the second clamping arm, so that the second clamping arm can be controlled by controlling the second control member, and the same technical effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0030] Figure 1The structure diagram of the valve ring shrinking device involved in the present invention is schematically shown, in which the valve ring shrinking device is in an unused state;

[0031] Figure 2 The structure diagram of the valve ring shrinking device involved in the present invention is schematically shown, in which the valve ring shrinking device is in a clamping state;

[0032] Figure 3 for Figure 1 A partial magnified view of the structure at A in the middle;

[0033] Figure 4 for Figure 2 A partial magnified view of the structure at B in the middle;

[0034] Figure 5 The partial structural diagram of the valve ring shrinking device involved in the present invention is schematically shown, and the valve ring shrinking device is in an unused state in the figure;

[0035] Figure 6 The partial structural diagram of the valve ring shrinking device involved in the present invention is schematically shown, in which the valve ring shrinking device is in a clamping state;

[0036] Figure 7 The schematic diagram of the partial structure of the assembly formed by the main arm, the first clamping arm and the first operating member of the valve ring shrinking device involved in the present invention is schematically shown, and the first clamping arm is located in the first yielding area in the figure;

[0037] Figure 8 The schematic diagram of the partial structure of the assembly formed by the main arm, the first clamping arm and the first operating member of the valve ring annulus contraction device involved in the present invention is schematically shown, and the first clamping arm is in an extended state in the figure;

[0038] Fig. 9 The structure diagram of the assembly formed by the first clamping arm and the first operating member of the valve ring shrinking device involved in the present invention is schematically shown;

[0039] Fig.10 The structure diagram of the main body arm of the valve ring shrinking device involved in the present invention is schematically shown at one viewing angle;

[0040] Fig.11 The structure diagram of the main body arm of the valve ring shrinking device involved in the present invention is schematically shown in another viewing angle;

[0041] Fig.12 The structure diagram of the first clamping arm of the valve ring shrinking device involved in the present invention is schematically shown;

[0042] Fig.13 for Fig.12a cross-sectional view of the first clamping arm shown;

[0043] Fig.14 The structure diagram of the second clamping arm of the valve ring shrinking device involved in the present invention is schematically shown;

[0044] Fig.15 for Fig.14 a cross-sectional view of the second clamping arm shown;

[0045] Figure 16.1 The structure diagram of a traction member involved in the present invention is schematically shown;

[0046] Figure 16.2 A schematic diagram of the structure of another traction member involved in the present invention is shown;

[0047] Fig.17 The schematic diagram of the structure of the assembly formed by the suture and the limiting structure involved in the present invention is schematically shown;

[0048] Fig.18 A schematic diagram of a state of the valve ring shrinking device involved in the present invention during use is schematically shown, in which the puncture needle and the suture are in a state where they have not penetrated into the first puncture channel;

[0049] Fig.19 A schematic diagram of a state of the valve ring shrinking device involved in the present invention during use is schematically shown, in which the puncture needle and the suture are in a state of passing through the first puncture channel, and the first limiting structure is removed from the puncture needle;

[0050] Fig. 20 A schematic diagram of a state of the valve ring shrinking device involved in the present invention during use is schematically shown, in which the puncture needle is in a retracted state, and the first limiting structure and the first clamping arm are in a connected state;

[0051] Fig.21 The diagram schematically shows a first state of the valve ring shrinking device involved in the present invention during use, in which the first clamping arm and the second clamping arm are in a state of clamping the valve ring;

[0052] Fig. 22 The schematic diagram schematically shows the second state of the valve ring contraction device involved in the present invention during use, in which the traction member is passed through the puncture needle and connected to the first clamping arm, and the limiting structure is located in the limiting structure installation position;

[0053] Fig.23 The third state of the valve ring contraction device of the present invention during use is schematically shown, in which the traction member is passed through the puncture needle and connected to the first clamping arm, and the limiting structure is separated from the limiting structure installation position;

[0054] Fig.24 The fourth state of the valve ring shrinking device of the present invention during use is schematically shown, in which the first clamping arm allows the suture to pass through the valve ring via the traction member;

[0055] Fig.25 The fifth state of the valve ring shrinking device of the present invention during use is schematically shown, in which the first clamping arm allows the suture to pass through the valve ring via the traction member, and the limiting structure is in the position state;

[0056] Fig.26 A schematic diagram showing a state in which suturing is completed by the valve ring shrinking device involved in the present invention;

[0057] Fig. 27 Schematically shows a partial structural diagram of some embodiments of the present invention when the suture has completed suturing but has not been locked by the locking unit;

[0058] Fig.28 Schematically shows a partial structural diagram of the suture after being locked by a locking unit in some embodiments of the present invention;

[0059] Fig.29 A schematic diagram of a valve ring after being repaired by the valve ring shrinking device provided by the present invention is shown;

[0060] Fig.30 Another schematic diagram of a valve ring after being repaired by the valve ring shrinking device provided by the present invention is schematically shown.

[0061] Description of reference numerals:

[0062] 10. Valve ring retraction device;

[0063] 1. Main arm; 11. First clearance area; 111. First connection position; 12. Second clearance area; 121. Second connection position; 13. First channel; 14. Second channel; 15. Puncture needle channel;

[0064] 2. first clamping arm; 21. clamping portion of the first clamping arm; 22. first puncture channel; 23. clearance notch; 24. first clamping surface;

[0065] 3. Second clamping arm; 31. Clamping portion of the second clamping arm; 32. Second puncture channel; 33. Second clamping surface; 34. Positioning position of the limiting structure;

[0066] 4. puncture needle; 41. hooking notch;

[0067] 51. Suture; 52. Limiting structure; 53. Traction member; 531. Traction part; 532. Traction ring; 533. Traction line; 54. Locking unit;

[0068] 6. Push items;

[0069] 7. A first control member;

[0070] 8. Connecting pipe;

[0071] 9. Control handle;

[0072] X, valve annulus; Y, heart. DETAILED DESCRIPTION

[0073] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0074] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described in the text are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0075] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0076] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0077] In the present application, "above a certain value" includes the number itself, for example, "above eight" includes "eight".

[0078] It should be noted that, in this application, “multiple” includes “two”.

[0079] It should be noted that "distal" and "proximal" are used as directional terms, which are commonly used terms in the field of interventional medical devices, where "distal" refers to the end away from the operator during surgery, and "proximal" refers to the end close to the operator during surgery. Axial refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device; radial refers to the direction perpendicular to the above axial direction.

[0080] The present application provides a valve ring shrinking device 10, specifically, Figures 1 to 15 As shown, it includes a main arm 1, a first clamping arm 2 and a second clamping arm 3; the first clamping arm 2 is rotatably connected to the main arm 1; the second clamping arm 3 is rotatably connected to the main arm 1; the first clamping arm 2 is provided with a first puncture channel 22, and the second clamping arm 3 is provided with a second puncture channel 32; the annulus retraction instrument also includes a puncture needle 4 and a traction member 53, and the puncture needle 4 can be connected to the suture 51 via the traction member 53; the annulus retraction instrument 10 is configured such that when the first clamping arm 2 and the second clamping arm 3 are in a clamping state, the traction member 53 can pull the suture 51 along with the puncture needle 4 through the second puncture channel 32 to pass through the first puncture channel 22.

[0081] It should be pointed out that the structure of the main arm 1 in the present application is not specifically limited. In order to facilitate the annulus shrinking device 10 to extend from the apex of the heart Y into a specific position of the heart Y during the operation, in the specific implementation, Figures 1 to 8 , Fig.10 and Fig.11 As shown, the main body arm 1 is in the shape of an elongated strip as a whole, and the distal end of the main body arm 1 is configured as a conical structure that can play a puncture and guide role.

[0082] It should be noted that the structure of the first clamping arm 2 and the structure of the second clamping arm 3 in the present application are not specifically limited, and they can be any structure that can cooperate with each other to clamp the valve ring. In specific implementation, the first clamping arm 2 can be selectively made into a rod or strip shape as a whole. Figures 3 to 9 , Fig.12 and Fig.13 As shown, the first clamping arm 2 is arranged in a strip shape as a whole; and the first end of the first clamping arm 2 is hingedly connected to the main arm 1, and the second end of the first clamping arm 2 is set as the clamping part of the first clamping arm. Similarly, the second clamping arm 3 can also be selectively made to be rod-shaped or strip-shaped as a whole. Figures 3 to 6 , Fig.14 and Fig.15 As shown, the second clamping arm 3 is arranged in a strip shape as a whole, and the first end of the second clamping arm 3 is hingedly connected to the main arm 1, and the second end of the second clamping arm 3 is set as the clamping part of the second clamping arm.

[0083] It should be noted that the rotation angle of the first clamping arm 2 is not specifically limited, and it can be any angle that meets the need of clamping the valve ring X in cooperation with the second clamping arm 3. Similarly, the rotation angle of the second clamping arm 3 is not specifically limited, and it can be any angle that meets the need of clamping the valve ring X in cooperation with the first clamping arm 2.

[0084] It should be noted that the materials of the main arm 1, the first clamping arm 2 and the second clamping arm 3 in the present application are not specifically limited; in the specific implementation, the main arm 1, the first clamping arm 2 and the second clamping arm 3 are preferably made of medical implantable materials, and specifically, the main arm 1, the first clamping arm 2 and the second clamping arm 3 can be selectively made of medical implantable materials such as stainless steel, cobalt-chromium alloy, etc.

[0085] It should also be noted that the structure of the puncture needle 4 in the present application is not specifically limited, and it can be any structure that can pull the traction member 53 and pass through the first puncture channel 22 and the second puncture channel 32. In specific implementation, it is preferred that the puncture needle 4 is configured as a hollow needle that can be connected to the traction member 53, specifically as follows Figures 18 to 20 As shown, the puncture end of the puncture needle 4 can be hooked with the pulling member 53 .

[0086] The present application makes the valve ring shrinking instrument 10 include a first clamping arm 2 and a second clamping arm 3. During the valve ring shrinking operation, the first clamping arm 2 and the second clamping arm 3 can accurately and quickly clamp the designated position of the valve ring X. By capturing the designated position of the valve ring X by clamping, it is not only convenient to adjust the capture position, but also convenient to implement in vitro manipulation. In addition, during the operation, since the designated position of the valve ring X is clamped by the first clamping arm 2 and the second clamping arm 3, the position of the valve ring X targeted during the operation can be effectively limited, so as to implement targeted operations on the clamping position of the valve ring X, thereby effectively reducing the difficulty of the operation and improving the efficiency and success rate of the operation.

[0087] In addition, when the puncture is performed under the clamping of the valve ring X by the first clamping arm 2 and the second clamping arm 3, the puncture needle 4 can cause less damage to the valve ring tissue, and while reducing the risk of tearing the valve ring X, it can effectively improve the safety and reliability of the valve ring X ring contraction operation. In addition, the present application provides a first puncture channel 22 on the first clamping arm 2 and a second puncture channel 32 on the second clamping arm 3, so that the puncture needle 4 is guided by the first puncture channel 22 and the second puncture channel 32 to facilitate puncture of the tissue clamped by the first clamping arm 2 and the second clamping arm 3.

[0088] As some preferred embodiments of the present application, Figure 1 and Figure 2 As shown, the valve ring contraction instrument 10 also includes a connecting tube 8 and a control handle 9, one end of the connecting tube 8 is connected to the proximal end of the main arm 1, and the other end of the connecting tube 8 is connected to the control handle 9. The proximal end of the first control member 7 is connected to the control handle 9, and the distal end of the first control member 7 passes through the two ends of the connecting tube 8 and is connected to the first clamping arm 2, and the control handle 9 can control the rotation of the first clamping arm 2 through the first control member 7. Similarly, the proximal end of the second control member is connected to the control handle 9, and the distal end of the second control member passes through the two ends of the connecting tube 8 and is connected to the second clamping arm 3, and the control handle 9 can control the rotation of the second clamping arm 3 through the second control member. In specific implementation, according to the needs of use, the position and state of the first clamping arm 2 and the second clamping arm 3 are adjusted by controlling the first control member 7 and the second control member.

[0089] As some preferred embodiments of the present application, Figures 6 to 9As shown, a first channel 13 is provided inside the main arm 1 to connect the proximal end of the main arm 1 and the connection between the first clamping arm 2 and the main arm 1. The distal end of the first operating member 7 passes through the two ends of the connecting tube 8 and the first channel 13 in sequence and is connected to the first clamping arm 2. It should be pointed out that there is no specific restriction on the connection method between the distal end of the first operating member 7 and the first clamping arm 2, which only needs to meet the requirements for the first operating member 7 to operate the first clamping arm 2. In specific implementation, the distal end of the first operating member 7 can be connected to the first clamping arm 2 by a fixed connection or a hinged connection; as a preferred embodiment, Fig. 9 As shown, the distal end of the first operating member 7 is preferably hinged to the first clamping arm 2 so that the control stress between the first operating member and the first clamping arm 2 can be released during the operation process.

[0090] It should also be noted that the number of the first operating members 7 included in the valve ring contraction device 10 is not specifically limited. In a specific implementation, the first clamping arm 2 can be selectively controlled by one or more first operating members 7. In a specific implementation, the valve ring contraction device 10 includes two first operating members 7, and the main arm 1 is provided with two first channels 13 (such as Fig.11 As shown in the figure, each first operating member 7 is connected to the first clamping arm 2 through a first channel 13. When in use, the first operating member 7 is pulled toward the proximal or distal end of the valve ring contraction device 10 by the operating handle 9 to rotate the first clamping arm 2.

[0091] In order to facilitate smooth puncture of the puncture needle 4, a puncture needle channel 15 connecting the proximal end of the main arm 1 and the connection between the second clamping arm 3 and the main arm 1 is also provided on the main arm 1. During the operation, the puncture needle 4 can enter the second puncture channel 32 through the puncture needle channel 15, and further pass through the second puncture channel 32 and out of the first puncture channel 22.

[0092] As some preferred embodiments of the present application, a second channel 14 is further provided inside the main arm 1, connecting the proximal end of the main arm 1 and the connection between the second clamping arm 3 and the main arm 1. The distal end of the second operating member passes through the two ends of the connecting tube 8 and the second channel 14 in sequence and is connected to the second clamping arm 3. It should be pointed out that there is no specific restriction on the connection method between the distal end of the second operating member and the second clamping arm 3, and it only needs to meet the requirements for the second operating member to operate the second clamping arm 3. In specific implementation, the distal end of the second operating member can be connected to the second clamping arm 3 by a fixed connection or a hinged connection.

[0093] It should also be noted that the number of second control members included in the valve ring contraction device 10 is not specifically limited. In specific implementation, the second clamping arm 3 can be selectively controlled by one or more second control members. In specific implementation, the valve ring contraction device 10 includes two second control members, and the main arm 1 is provided with two second channels 14 (such as Fig.11 As shown in FIG. 1 , each second operating member is connected to the second clamping arm 3 through a second channel 14. When in use, the second operating member is pulled toward the proximal or distal end of the valve ring contraction device 10 by the operating handle 9 to rotate the second clamping arm 3.

[0094] It should be noted that there are no specific restrictions on the structure and material of the first control member 7 and the second control member. In specific implementation, the first control member 7 and the second control member can be selectively made of control wires made of implantable metal materials. Specifically, the first control member 7 and the second control member can be selectively made of stainless steel, nickel-titanium alloy and other materials.

[0095] The present application enables the valve ring shrinking device 10 to include a first control member 7 connected to the first clamping arm 2, and then the first clamping arm 2 can be controlled by controlling the first control member 7, which is not only convenient to control, but also has the advantages of simple structure. Similarly, the valve ring shrinking device 10 includes a second control member connected to the second clamping arm 3, and then the second clamping arm 3 can be controlled by controlling the second control member, which can also achieve the same technical effect.

[0096] In addition, the present application enables the first clamping arm 2 to be controlled by the first operating member 7 and the second clamping arm 3 to be controlled by the second operating member, so that the first clamping arm 2 and the second clamping arm 3 have the characteristics of being individually controlled, and the position and state of the first clamping arm 2 and the second clamping arm 3 can be flexibly adjusted according to the requirements of the surgical process, so that the valve ring contraction instrument 10 can fully meet the adjustment requirements during surgical operations.

[0097] As some preferred embodiments of the present application, the valve ring shrinking device 10 further selectively includes a suture 51, and the puncture needle 4 is connected to the suture 51 via a traction member 53; the traction member 53 and the puncture needle 4 have a connection state when the traction member 53 is pulled and a separation state after passing through the first puncture channel 22. In specific implementation, the puncture needle 4 can be selectively hooked and connected with the traction member 53, and when separation is required, the puncture needle 4 and the traction member 53 can be selectively separated by other components.

[0098] During the specific operation, when the puncture needle 4 is in the puncture process, the traction member 53 and the puncture needle 4 are in a connected state, and the traction member 53 and the suture 51 are in a connected state, so that the puncture needle 4 can pull the suture 51 through the traction member 53; when the puncture end of the puncture needle 4 passes through the first puncture channel 22, the traction member 53 is separated from the puncture needle 4 and can be connected to the first clamping arm 2, so that the first clamping arm 2 can pull the suture 51 through the traction member 53.

[0099] The present application enables the traction member 53 and the puncture needle 4 to be connected or separated according to actual needs by providing a connection state when the traction member 53 is pulled and a separation state after the puncture needle 4 passes through the first puncture channel 22; after the traction member 53 and the puncture needle 4 pass through the first puncture channel 22, the traction member 53 is separated from the puncture needle 4 to facilitate the connection of the traction member 53 with the first clamping arm 2.

[0100] As some preferred embodiments of the present application, the first puncture channel 22 is further selectively made to be a puncture hole that passes through the clamping portion 21 of the first clamping arm along the puncture direction of the puncture needle 4; the first end of the second clamping arm 3 is connected to the main arm 1, the clamping portion 31 of the second clamping arm is located at the second end of the second clamping arm 3, the second puncture channel 32 extends from the first end of the second clamping arm 3 to the clamping portion of the second clamping arm, and the second puncture channel 32 passes through both ends of the second clamping arm 3 (such as Fig.15 In a specific implementation, when the first clamping arm 2 and the second clamping arm 3 are in a clamping state, the second puncture channel 32 corresponding to the clamping portion 31 of the second clamping arm is coaxial with the first puncture channel 22, and the first puncture channel 22 and the second puncture channel 32 are both adapted to the puncture needle 4, so that the puncture needle 4 can pass along the first puncture channel 22 and the second puncture channel 32. Further, as Fig.12 and Fig.13 As shown, the first puncture channel 22 is a straight channel that passes through the clamping portion 21 of the first clamping arm. Fig.15 As shown, the second puncture channel 32 is a bent channel that passes through the second clamping arm 3 and bends toward the first clamping arm 2. In order to facilitate the puncture needle 4 to pass smoothly through the bend, the bend of the second puncture channel 32 is overall gourd-shaped. In a specific implementation, the bend of the second puncture channel 32 can also be selectively set to other structural forms that allow the puncture needle to pass through.

[0101] In order to facilitate the smooth puncture of the puncture needle 4, it is further preferred that the hole size of the penetration end of the puncture hole is larger than the hole size at the exit of the second puncture channel 32. When the first clamping arm 2 and the second clamping arm 3 are in a clamping state, even if there is a certain misalignment between the first puncture channel 22 and the second puncture channel 32, the puncture needle 4 can still penetrate through the second puncture channel 32 and exit through the first puncture channel 22, so as to improve the adaptability of the valve ring shrinkage device 10.

[0102] In order to position, limit and guide the puncture needle 4 during the puncture process, the puncture hole is further selectively set to be tapered along the puncture direction of the puncture needle 4. Fig.13 As shown, the puncture hole can be selectively set as a tapered hole extending from the entrance of the first puncture hole to the exit of the first puncture hole. The present application can also make the puncture position of the puncture needle 4 more accurate by setting the puncture hole to be tapered, and also facilitate the puncture end of the puncture needle 4 to pass through the first puncture channel 22, which can effectively reduce the puncture difficulty of the puncture needle 4.

[0103] As some preferred embodiments of the present application, the suture 51 is further selectively provided with a limiting structure 52 (such as Fig.17 The first end of the traction member 53 is provided with a traction portion 531 (as shown in FIG. Figure 16.1 and Figure 16.2 As shown), the puncture needle 4 can be connected to the traction member 53 via the traction portion 531, and the second end of the traction member 53 is provided with a traction ring 532 for connecting the suture 51. The suture 51 passes through the traction ring 532 and is connected to the traction member 53. The traction portion 531 can pass through the first puncture channel 22 with the puncture needle 4 and be connected to the first clamping arm 2.

[0104] It should be noted that the limiting structure 52 in the present application is not specifically limited, and it can be any structure that can prevent the suture 51 from being pulled off from the punctured tissue. As a preference, the limiting structure 52 can be selectively configured as a gasket sleeved on the suture 51. In specific implementation, for example, Fig.17 As shown, the limiting structure 52 is a gasket that is square in shape as a whole. As a convertible implementation, the limiting structure 52 can also be selectively set to other structural forms, such as circular, triangular, etc.

[0105] It should be noted that the structure of the traction member 53 in the present application is not specifically limited, and it can be any structural form that meets the requirements of the valve ring reduction surgery; in specific implementation, such as Figure 16.1 and Figure 16.2As shown, the traction member 53 is arranged in a linear shape as a whole, the traction portion 531 is located at a first end of the traction member 53 , the traction ring 532 is located at a second end of the traction member 53 , and the traction portion 531 and the traction ring 532 are connected via a traction line 533 .

[0106] In addition, the structure of the traction part 531 is not specifically limited, and it can be any structure that can be connected to the puncture needle 4 and the first clamping arm 2. Figure 16.1 , Figure 16.2 , Figures 18 to 20 As shown, the traction part 531 is a short rod structure that can be matched with the puncture needle 4, and one end of the traction line 533 is connected to the middle part of the short rod structure. When the traction part 531 passes through the first puncture channel 22 along with the puncture needle 4, and after the traction part 531 is separated from the puncture needle 4, the angle between the traction part 531 and the traction line 533 changes, so that the traction part 531 is hooked with the first clamping arm 2, so as to realize the connection between the traction member 53 and the first clamping arm 2.

[0107] The present application provides a limiting structure 52 on the suture 51, so that the suture 51 can be firmly connected to the valve ring X, and the suture 51 can be prevented from being pulled off the valve ring X during the traction process of the first clamping arm 2. In addition, the present application provides a traction portion 531 on the first end of the traction member 53, and a traction ring 532 on the second end of the traction member 53; thereby, the puncture needle 4 can pull the suture 51 through the traction member 53, and the limiting structure 52 can be quickly put in place during the operation.

[0108] As some preferred embodiments of the present application, the puncture needle 4 is further selectively made into a hollow needle, and the traction portion 531 can be adapted to be connected with the hollow needle; when the puncture needle 4 and the traction portion 531 are in a connected state, at least part of the traction portion 531 is located inside the puncture end of the puncture needle 4 (such as Fig.18 The annulus contraction device 10 further comprises a pusher 6, which extends from the proximal end of the hollow needle and is capable of pushing the traction portion 531 so that the traction portion 531 can be separated from the puncture needle 4 and connected to the first clamping arm 2.

[0109] It should be noted that the connection method between the puncture needle 4 and the traction member 53 is not specifically limited, and it can be any setting form that can meet the needs of connecting and separating the puncture needle 4 and the traction member 53, such as Fig.18 As shown, the puncture needle 4 is a hollow needle, and a hanging notch 41 is provided on the side wall of the puncture end of the puncture needle 4. The traction part 531 is inserted by the puncture end of the puncture needle 4 and is hung with the hanging notch 41. During the puncture process of the puncture needle 4, the puncture needle 4 can pull the suture 51 through the traction part 53.

[0110] In specific implementation, Fig.19As shown, the pusher 6 is set as a push rod that can penetrate the hollow needle. When it is necessary to connect the traction member 53 with the clamping part 21 of the first clamping arm, the pusher pushes the traction part 531 out of the hollow needle. Under the action of the traction part 531, the connection between the suture 51 and the first clamping arm 2 is achieved. In the present application, the puncture needle 4 is set as a hollow needle and the pusher 6 is provided. Under the action of the pusher, the connection between the puncture needle 4 and the traction member 53 can be released, and the traction member 53 is connected to the first clamping arm 2, so that the first clamping arm 2 can pull the suture 51 through the traction member 53, which is convenient for the smooth implementation of the valve ring reduction operation. The above-mentioned setting mode can not only make the puncture needle 4 be firmly connected with the traction member 53 during the puncture process, but also facilitate the separation of the puncture needle 4 from the traction member 53. In addition, it also has the advantages of simple structure and convenient operation.

[0111] As some preferred embodiments of the present application, a position-limiting structure installation position 34 is further selectively provided adjacent to the clamping portion 31 of the second clamping arm, and the position-limiting structure 52 can be connected to the position-limiting structure installation position 34. The position-limiting structure 52 is configured such that when the traction member 53 is pulled by the first clamping arm 2, the position-limiting structure 52 can be disconnected from the position-limiting structure installation position 34. The position-limiting structure installation position 34 is not specifically limited, and it can be any structural form that can be used to fix the position-limiting structure. In specific implementation, such as Fig.15 As shown, the limiting structure mounting position 34 is a mounting groove adapted to the limiting structure 52, and the mounting groove is located at the side wall position near the clamping portion 31 of the second clamping arm. The limiting structure 52 can be installed in the mounting groove. When the limiting structure 52 is pulled by the suture 51, the limiting structure 52 is disconnected from the mounting groove and can be removed from the mounting groove. It should also be pointed out that the setting position of the mounting groove is not limited to the position shown in the figure, and it can also be set at other positions adjacent to the clamping portion 31 of the second clamping arm.

[0112] In the present application, a limiting structure installation position 34 is provided near the clamping portion 31 of the second clamping arm, and a limiting structure 52 is connected to the limiting structure installation position 34, so that the limiting structure 52 connected to the suture 51 is closer to the clamped tissue, thereby preventing the limiting structure 52 from hooking with nearby body tissue (such as tendinous chordae) as much as possible, so that the valve ring shrinking device 10 can be used more safely. In addition, under the traction of the traction member 53, the limiting structure 52 can be quickly put in place.

[0113] As some preferred embodiments of the present application, the first clamping portion 21 of the first clamping arm is further selectively provided with a first clamping surface 24, and the clamping portion 31 of the second clamping arm is provided with a second clamping surface 33; the first puncture channel 22 passes through the first clamping surface 24; the second clamping surface 33 is located at the end surface of the second end of the second clamping arm 3, and the second puncture channel 32 passes through the second clamping surface 33; when the first clamping arm 2 and the second clamping arm 3 are in the clamping state, the first puncture channel 22 and the second puncture channel 32 are opposite. In specific implementation, it is preferred that the first clamping surface 24 is set to a plane (such as Fig.13 As shown), the second clamping surface 33 is set to a plane (as shown Fig.15 As shown in FIG. 1 , when the first clamping arm 2 and the second clamping arm 3 are in a clamping state, the first clamping surface 24 and the second clamping surface 33 face each other to clamp the annulus X tissue. In some preferred embodiments of the present application, as shown in FIG. Fig.15 As shown, the second puncture channel 32 is further selectively extended from the first end of the second clamping arm 3 to the second end of the second clamping arm 3 and penetrates the second clamping surface 33. In the present application, by allowing the first puncture channel 22 to pass through the first clamping surface 24, and the second puncture channel 32 to pass through the second clamping surface 33, the puncture needle 4 can pass through the tissue between the first clamping surface 24 and the second clamping surface 33. Under the action of the first clamping surface 24 and the second clamping surface 33, the position of the clamped valve ring X can be better constrained, which not only makes the puncture position more accurate, but also effectively reduces the damage to the valve ring X caused by the puncture process.

[0114] In the present application, the first puncture channel 22 passes through the first clamping surface 24, and the second puncture channel 32 passes through the second clamping surface 33, so that the puncture needle 4 can pass through the tissue between the first clamping surface 24 and the second clamping surface 33. Under the action of the first clamping surface 24 and the second clamping surface 33, the position of the clamped valve ring can be better constrained, making the puncture position more accurate and effectively reducing the damage to the valve ring X caused by the puncture process.

[0115] As some preferred embodiments of the present application, a first clearance area 11 is further selectively provided on the side wall of the main arm 1, the first clearance area 11 is adapted to the first clamping arm 2, a first connection position 111 is provided at the proximal end of the first clearance area 11, the first end of the first clamping arm 2 is rotatably connected to the first connection position 111 via a rotating shaft, the clamping portion 21 of the first clamping arm is located at the second end of the first clamping arm, and the first clamping arm 2 has a state of being located in the first clearance area 11 and a state of extending out of the first clearance area 11 after rotation to clamp the valve ring X. In specific implementation, the first clearance area 11 can be matched according to the size of the first clamping arm 2, as shown in FIG. Fig.10 and Fig.11As shown, the first clearance area 11 is configured as a clearance groove provided on the side wall of the main arm 1. During the use of the valve ring shrinking device 10, the position and state of the first clamping arm 2 can be adjusted according to the actual operation requirements during the operation.

[0116] A second clearance area 12 is also provided on the side wall of the main arm 1. The second clearance area 12 is adapted to the second clamping arm 3. A second connection position 121 is provided at the proximal end of the second clearance area 12. The first end of the second clamping arm 3 is rotatably connected to the second connection position 121 via a rotating shaft. The clamping portion 31 of the second clamping arm is located at the second end of the second clamping arm 3. The second clamping arm 3 has a state of being located in the second clearance area 12 and a state of extending out of the second clearance area 12 after rotation to clamp the valve ring X. In specific implementation, the second clearance area 12 can be matched according to the size of the second clamping arm 3, as shown in FIG. Fig.10 and Fig.11 As shown, the second clearance area 12 is configured as a clearance groove provided on the side wall of the main arm 1. During the use of the valve ring shrinking device 10, the position and state of the second clamping arm 3 can be adjusted according to the actual operation requirements during the operation.

[0117] As a preferred embodiment of the present application, Fig.10 and Fig.11 As shown, the first making way area 11 and the second making way area 12 are arranged along the extension direction of the main arm 1 , and the first making way area 11 is disposed between the distal end of the main arm 1 and the second making way area 12 .

[0118] As some preferred embodiments of the present application, Fig. 9 and Fig.12 As shown, a clearance gap 23 is formed at the first end of the first clamping arm 2 along its length direction. When the first clamping arm 2 and the second clamping arm 3 are in a folded state, at least part of the structure of the second clamping arm 3 is located in the clearance gap 23. This arrangement can effectively reduce the length requirement of the main arm 1, so as to alleviate the problem of increased difficulty in operating the valve ring shrinking device due to the long main arm 1. As a preferred embodiment of the present application, the width of the second clamping arm 3 can be further selectively made smaller than the width of the first clamping arm 2.

[0119] In the present application, the first clamping arm 2 is configured to be located in the first making way area 11 and to extend out of the first making way area 11 after rotation so as to clamp the valve ring X, and the second clamping arm 3 is configured to be located in the second making way area 12 and to extend out of the second making way area 12 after rotation so as to clamp the valve ring X; thereby, the valve ring retraction instrument 10 can have a folding function, so that the valve ring retraction instrument 10 can be adjusted as needed during minimally invasive surgery.

[0120] As some preferred embodiments of the present application, the second end of the first clamping arm 2 is further selectively bent toward the second clamping arm 3. Figure 4 , Figure 6 , Fig.12 and Fig.13 As shown, the first clamping arm 2 is bent in a Z-shape as a whole, and the first end of the first clamping arm 2 is hingedly connected to the main arm 1 through a rotating shaft, and the first clamping arm 2 can rotate toward the second clamping arm 3; the second end of the first clamping arm 2 is bent toward the second clamping arm 3. As some preferred embodiments of the present application, the second end of the second clamping arm 3 can also be selectively bent toward the first clamping arm 2.

[0121] The present application also discloses a method for using a valve ring retraction device 10, which is used to operate the valve ring retraction device 10 as described in any of the aforementioned embodiments, control the first clamping arm 2 and the second clamping arm 3, so that the first clamping arm 2 and the second clamping arm 3 are in a clamping state; control the puncture needle 4 connected to the suture 51, so that the puncture end of the puncture needle 4 passes through the second puncture channel 32 and exits from the first puncture channel 22; connect the traction member 53 to the first clamping arm 2, and pull the suture 51 through the first clamping arm 2.

[0122] In order to facilitate understanding of the use of the valve ring shrinking device 10 provided in the present application, the mitral valve ring shrinking surgery is now taken as an example, and the following Figures 21 to 30 The following instructions are given:

[0123] The distal end of the valve ring shrinking device 10 is extended from the apex position into the heart Y, and the first clamping arm 2 and the second clamping arm 3 are controlled to clamp the valve ring X at a designated position (such as Fig.21 When the clamping position deviates, the clamping position can be adjusted by controlling the first clamping arm 2 and the second clamping arm 3. When the first clamping arm 2 and the second clamping arm 3 clamp the designated position of the valve ring X, the puncture needle 4 connected with the suture 51 through the traction member 53 is controlled to pass through the first puncture channel 22 through the second puncture channel 32. After the puncture needle 4 passes through the first puncture channel 22, the traction part 531 of the traction member 53 is connected to the first clamping arm 2 (as shown in FIG. Fig. 22 After the traction portion 531 of the traction member 53 is connected to the first clamping arm 2, the limiting structure 52 is disengaged from the limiting structure mounting position 34 (as shown); Fig.23 ), further moving one end of the suture 51 provided with the limiting structure 52 toward the valve ring X (as shown in Fig.24 until the limiting structure 52 is connected to the valve ring (as shown in Fig.25 ); further pull the suture 51 until the other end of the suture 51 is pulled out of the heart Y through the first clamping arm 2; repeat the above process to connect another suture 51 to the designated position of the valve ring X (as shown in FIG. Fig.26 Shown and Fig. 27 Then, the two implanted sutures 51 are pulled to tighten the valve ring X. After adjustment, the sutures 51 are locked by the locking unit 54 (as shown in FIG. Fig.28 In the specific implementation, the ring contraction operation can be selectively performed on multiple positions of the valve ring X to achieve the purpose of repair. In the specific operation, the tightening position of the valve ring X can be selected according to the actual situation, for example Fig.29 and Fig.30 Two different annular X-reduction protocols are shown.

[0124] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A valve ring retraction device, characterized in that: It comprises a main body arm, a first clamping arm and a second clamping arm; the first clamping arm is rotatably connected to the main body arm; the second clamping arm is rotatably connected to the main body arm; the first clamping arm is provided with a first puncture channel, and the second clamping arm is provided with a second puncture channel; The annular retraction device also includes a puncture needle and a traction member, and the puncture needle can be connected to the suture via the traction member; the annular retraction device is configured so that when the first clamping arm and the second clamping arm are in a clamping state, the traction member can pull the suture along with the puncture needle through the second puncture channel to pass through the first puncture channel.

2. The valve ring shrinkage device according to claim 1, characterized in that: The valve ring contraction instrument also includes the suture, and the puncture needle is connected to the suture via the traction member; the traction member and the puncture needle have a connected state when the traction member is pulled and a separated state after passing through the first puncture channel.

3. The valve ring shrinkage device according to claim 2, characterized in that: The first puncture channel passes through the clamping portion of the first clamping arm along the puncture direction of the puncture needle; The second puncture channel extends from the first end of the second clamping arm to the clamping portion of the second clamping arm, and the second puncture channel passes through both ends of the second clamping arm; When the first clamping arm and the second clamping arm are in a clamping state, the first puncture channel is directly opposite to the second puncture channel.

4. The valve ring shrinkage device according to claim 2, characterized in that: The suture is provided with a limiting structure for connecting to the valve ring, the first end of the traction piece is provided with a traction portion for connecting to the first clamping arm, the second end of the traction piece is provided with a traction ring for connecting to the suture, and the puncture needle can be connected to the traction piece via the traction portion; the suture is connected to the traction piece via the traction ring, and the traction portion can pass through the first puncture channel with the puncture needle and be connected to the first clamping arm.

5. The valve ring shrinkage device according to claim 4, characterized in that: The puncture needle is a hollow needle, and the traction part can be adapted to be connected with the hollow needle; when the puncture needle and the traction part are in a connected state, at least part of the traction part is located inside the puncture end of the puncture needle; The valve ring shrinkage instrument also includes a pushing member, which is inserted from the proximal end of the hollow needle and can push the traction part so that the traction part is separated from the puncture needle and connected to the first clamping arm.

6. The valve ring retraction device according to claim 5, characterized in that: A limiting structure installation position is provided adjacent to the clamping portion of the second clamping arm, and the limiting structure can be connected to the limiting structure installation position. The limiting structure is configured to be disconnected from the limiting structure installation position when the traction member is pulled by the first clamping arm.

7. The valve ring retraction device according to claim 2, characterized in that: The first end of the first clamping arm is hinged to the main body arm, and the second end of the first clamping arm is bent toward the second clamping arm; and / or, The first end of the second clamping arm is hinged to the main body arm, and the second end of the second clamping arm is bent toward the first clamping arm.

8. The valve ring retraction device according to claim 2, characterized in that: A first clearance area is provided on the side wall of the main arm, and the first clamping arm is adapted to the first clearance area; a first connecting position is provided at the proximal end of the first clearance area, the first end of the first clamping arm is hinged to the first connecting position, the clamping portion of the first clamping arm is located at the second end of the first clamping arm, and the first clamping arm has a state of being located in the first clearance area and a state of extending out of the first clearance area after rotation for clamping the valve ring.

9. The valve ring retraction device according to claim 8, characterized in that: A second yielding area is also provided on the side wall of the main body arm, the second clamping arm is adapted to the second yielding area, a second connecting position is provided at the proximal end of the second yielding area, the first end of the second clamping arm is hinged to the second connecting position, the clamping portion of the second clamping arm is located at the second end of the second clamping arm, and the second clamping arm has a state of being located in the second yielding area and a state of extending out of the second yielding area after rotation to clamp the valve ring; The first clearance area is arranged between the distal end of the main body arm and the second clearance area.

10. The valve ring retraction device according to any one of claims 2 to 9, characterized in that: The valve ring contraction instrument further comprises a first control member for controlling the rotation of the first clamping arm; the main body arm is provided with a first channel connecting the proximal end of the main body arm and the connection between the first clamping arm and the main body arm, and the first control member is connected to the first clamping arm through the first channel; The valve ring contraction instrument also includes a second operating member for controlling the rotation of the second clamping arm; a second channel is provided on the main arm, connecting the proximal end of the main arm and the connection between the second clamping arm and the main arm, and the second operating member is connected to the second clamping arm through the second channel.

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