A mitral valve repair device that can capture and fix

Abstract

The present invention discloses a mitral valve repair device that can capture and fix, and the present invention relates to the technical field of mitral valve repair devices. The mitral valve repair device that can capture and fix includes an exposure structure. The exposure structure includes a stretching line, and the stretching line is fixedly connected with a traction ring by a key-lock structure. A coaxial rotating ring is arranged on one side of the traction ring, and adjustable blades are arranged on the outer side of the rotating ring. It further includes a capture structure. When the exposure structure is expanded and exposed, the capture structure penetrates through the exposure structure, and the capture structure unfolds from the closed state to the capture state. It further includes a traction rod, and both the exposure structure and the capture structure are located on the traction rod. By integrating the exposure structure and the capture structure into one body by the traction rod, the present invention can quickly capture the mitral valve according to the exposure result and the prior estimation after the exposure of the mitral valve repair surgery is completed. Both the capture position and the capture space can be adjusted by the doctor according to the actual situation, reducing the time and operation risk of the repair surgery.

Description

Technical Field

[0001] The present invention relates to the technical field of mitral valve repair devices, and particularly to a mitral valve repair device that can capture and fix. Background Art

[0002] Mitral regurgitation (MR) is the most common valvular lesion. Epidemiological research data in Europe and America show that in people over 75 years old, the prevalence rate of MR reaches 10%, significantly exceeding aortic valvular lesions. Similarly, with the aggravation of the aging process of the population in China, mitral regurgitation lesions will also lead to a heavy medical burden. Mitral valve repair or replacement is the gold standard for the treatment of MR, but some studies have shown that up to half of the patients with severe symptomatic MR do not choose surgical treatment, and to a large extent, the reason is related to the surgical risk. This large part of patients with poor tolerance to surgery urgently needs a less invasive treatment method as an alternative. Therefore, interventional mitral valve treatment technology has emerged as the times require. In the past decade, several transcatheter mitral valve repair technologies derived from different surgical procedures have emerged and are used to treat high-risk or inoperable patients. Successful mitral valve repair includes several key factors, specifically: first, accurate assessment of valvular dysfunction; second, continuous good exposure of the mitral valve; third, accurate application of repair techniques; fourth, assessment of the repair results during the operation; transesophageal echocardiography and valve housing examination are used to determine the specific mechanism of dysfunction, and the mitral valve is exposed through lateral atrial incision, and capture operations are performed as needed.

[0003] As a mitral valve repair device disclosed in Chinese Patent Publication No. CN213217910U, the repair device has an expanded state and a capture state. The first end of the support structure is detachably connected to the drive structure, and the first end can approach the second end of the support structure under the drive of the drive structure, so that the support structure is in an expanded state, and the support structure is configured to automatically return to the capture state when the first end is disengaged from the drive structure. Two capture arms are symmetrically arranged on both sides of the support structure. One end of the capture arm is connected to the support structure, and a capture space is formed between the other end and the support structure. When the support structure switches from the expanded state to the capture state, both capture spaces change from large to small to simultaneously capture the two leaflets of the mitral valve. This mitral valve repair device not only has a simple structure, low production difficulty, low cost, but also is easy to operate and has low requirements for doctors' operations.

[0004] During the exposure process in the repair operation, this clamp-type repair device lacks a corresponding exposure structure, and it is difficult to ensure the continuous intraoperative exposure surface during the clamping process. Therefore, the above repair device often needs to perform capture while traction exposure is carried out during mitral valve repair surgery, resulting in high requirements for doctors' operations during mitral valve repair surgery, and it is difficult to integrate the capture and exposure structures, making the surgical operation instruments too many, increasing the time and operation risk of the repair surgery. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a mitral valve repair device that can capture and fix, solving the problems set forth in the above-mentioned background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A mitral valve repair device that can capture and fix, comprising an exposure structure;

[0007] The exposure structure includes a traction line that penetrates into the exposed chamber cut open at the cephalic side behind the superior vena cava. The traction line is fixedly connected to a traction ring by a key-lock structure. A coaxial rotating ring is arranged on one side of the traction ring, and four adjustable blades are arranged on the outer side of the rotating ring. The four adjustable blades are respectively located at the head end of the atrioventricular incision, the tail end of the atrioventricular incision, and the middle of the atrioventricular incision;

[0008] It further includes a capture structure. When the exposure structure is expanded and exposed, the capture structure sequentially penetrates through the rotating ring and the traction ring, and the capture structure unfolds from the retracted state to the capture state;

[0009] It further includes a capture structure. When the exposure structure is expanded and exposed, the capture structure penetrates through the exposure structure, and the capture structure unfolds from the retracted state to the capture state;

[0010] It further includes a traction rod. The exposure structure and the capture structure are detachably connected to the traction rod; before the patient undergoes mitral valve repair with the exposure structure and the capture structure, the patient is induced by standard techniques and intubated with a single-lumen endotracheal tube, and a transesophageal echocardiogram probe is placed to preliminarily evaluate the valve, so as to estimate in advance the expansion distance of the adjustable blade for mitral valve exposure; and on this basis, the pericardium is incised on the right side of the midline of the human body. After the pericardial reflection of the superior vena cava is incised, a catheter is placed through the right atrial appendage and directly enters the superior vena cava for auxiliary venous drainage, providing a dry field of view and avoiding air block. At this time, the left atrial incision is made from the junction of the left atrium and the right superior pulmonary vein to the right side behind the superior vena cava. Then, the traction rod is slowly inserted. During the insertion process, the traction line is pulled by another operator. After the traction rod and the traction line are placed in the ideal position, the four adjustable blades maximize the incision area of the left atrium and provide consistent exposure on this basis. After the left atrium is maximally exposed in terms of the incision area, the capture structure penetrates through the exposure structure and slides down to the bottom of the traction rod. At this time, the capture structure is operated to complete the capture of the valve leaf.

[0011] A further improvement of the technical solution of the present invention lies in that: fixed blocks I are arrayed at the center of the end face of the outer wall of the traction ring, and each fixed block I is respectively hinged to an expansion link I through a hinge shaft I. One end of each expansion link I is respectively hinged to a connecting shaft I correspondingly, and the end of each connecting shaft I away from the expansion link I is hinged to a corresponding support rod, and each support rod is fixedly installed in the corresponding extension block.

[0012] A further improvement of the technical solution of the present invention lies in that: each of the extension blocks is fixedly installed on the corresponding magnetic attraction seat, a limiting notch is arranged on the outer end face of each magnetic attraction seat, and the four adjustable blades are magnetically attracted inside the corresponding limiting notch.

[0013] A further improvement of the technical solution of the present invention lies in that: the adjustable blades in the exposure structure can be selected from titanium alloy or aluminum alloy, and the exposure structure except the adjustable blades is made of aluminum alloy. It should be noted that the aluminum alloy used except for the adjustable blades is to reduce the overall weight of the exposure structure, because the exposure method of the exposure structure during the operation needs to be lifted and lowered manually by traction, so if the weight is too large, it is easy to cause excessive load on the doctor's hand during the long operation.

[0014] A further improvement of the technical solution of the present invention lies in that: fixed blocks II with the same number as the fixed blocks I are arrayed on the outer end face of the rotating ring. Each fixed block II is respectively hinged to an expansion link II through a hinge shaft II. The other end of each expansion link II is connected to a support rod through a connecting shaft II. Under the action of the stretching line, the rotating ring and the traction ring penetrate into the left atrial incision site. At this time, because the left atrial incision site is not expanded, the rotating ring is blocked by some tissues and cannot enter completely. At this time, manual intervention is needed to peel off some unseparated tissues, hold the rotating ring, and pull the stretching line. Then the stretching line pulls the traction ring to rise and fall. Because the fixed blocks I are respectively hinged to the expansion links I through the hinge shafts I, the expansion links I pull and stretch the support rods to expand towards the circular outside during the descending process, and vice versa. Then, due to the action of the fixed blocks II, the hinge shafts II and the link II, the adjustable blades are finally expanded until the left atrial incision area is maximally exposed, achieving a linkage effect.

[0015] A further improvement of the technical solution of the present invention lies in that: the four adjustable blades and the traction ring form a filling area, and a folded sponge is placed in the filling area. The folded sponge is placed between the cardiac apex and the pericardium to expose the anterolateral papillary muscle. At this time, the pressure of the right ventricular outflow tract of the heart will help to expose the annular structure at the anterolateral commissure.

[0016] A further improvement of the technical solution of the present invention lies in that: the capture structure includes an upper plate and a lower plate. The traction rod penetrates through the upper plate and the lower plate, and the upper plate and the lower plate slide on the traction rod. Support arms I are symmetrically arranged at the left and right ends of the upper plate, and support arms II are symmetrically arranged at the left and right ends of the lower plate.

[0017] A further improvement of the technical solution of the present invention is that: a capture arm is provided on one side of the second support arm, a disassembly block is provided between two groups of adjacent capture arms, an anti-stripping and puncture-proof device is provided at the top of the disassembly block, the disassembly block is slidably installed in the sliding groove inside the second support arm, a telescopic rod with a spring sleeved thereon is provided in the sliding groove, the telescopic end of the telescopic rod abuts the disassembly block in the initial state, and the telescopic rod abuts the disassembly block, thereby completing the anti-stripping and puncture-proof fixing function, and in the later disassembly and cleaning, the sleeved spring is contracted, and the telescopic rod is squeezed at this time to quickly complete the abutment of the disassembly block, thereby improving the convenience of installation and disassembly, and further, the position of the disassembly block is replaced according to different selections of the telescopic rod and the spring, so that corresponding treatment is performed according to the specific situation of the patient and the preliminary evaluation of the valve, thereby improving the adaptability and compatibility of the device, and laying the foundation for accurate and safe mitral valve repair.

[0018] The further improvement of the technical solution of the present invention lies in that: the support arm, the support arm two and the capture arm are all connected by a pin, and the support arm one and the upper plate, and the support arm two and the lower plate are also connected by a pin, the bottom of the traction rod is provided with a blocking threaded portion, the internal hole of the lower plate is provided with a threaded groove matching the blocking threaded portion, and the inner wall of the traction ring and the rotating ring and the outer wall of the traction rod all have a penetration area for the upper plate and the lower plate to penetrate, after the upper plate and the lower plate slide to the bottom on the traction rod, because the threaded groove at the bottom of the lower plate matches the blocking threaded portion, the lower plate needs to rotate to continue to explore, so the lower plate stops at the blocking threaded portion, and the descent of the upper plate at this time causes the support arm one, the support arm two and the capture arm to be pressed down and rotated, at this time, controlling the height of the upper plate to the traction rod can control the size of the capture space in the capture structure, that is, the rotation amplitude of the capture arm, the capture structure changes from a retracted state to a capture state, and the simultaneous capture of the two leaflets of the mitral valve is completed through precise control.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the exposure structure and the capture structure are integrated into one by a traction rod, and after the mitral valve repair surgery is exposed, the mitral valve can be quickly captured according to the exposure results and the prior estimation, and the capture position and capture space can be adjusted by the doctor according to the actual situation, thereby reducing the time and operation risk of the repair surgery;

[0020] The traction rod is slowly inserted, and the stretch wire is pulled by another operator during the insertion process. After the traction rod and the stretch wire are placed in the ideal position, the four adjustable blades maximize the incision area of ​​the left atrium and provide consistent exposure on this basis. After the left atrium incision area is exposed to the maximum, the capture structure penetrates the exposure structure and slides down to the bottom of the traction rod, and the capture structure completes the capture of the valve leaflet.

[0021] By toggling the sleeved spring to contract, the telescopic rod is squeezed at this time, and the abutment of the disassembly and assembly block is quickly completed, thereby improving the convenience of installation and disassembly. Further, by different selections of the telescopic rod and the spring, the position of the disassembly and assembly block is adjusted, so as to perform corresponding processing according to the specific situation of the patient and the preliminary evaluation of the valve, improving the adaptability and compatibility of the device, and laying a foundation for precise and safe mitral valve repair;

[0022] By controlling the height of the upper plate relative to the traction rod, the size of the capture space within the capture structure can be controlled, that is, the rotation amplitude of the capture arm. The capture structure changes from the retracted state to the capture state, and the two leaflets of the mitral valve are simultaneously captured through precise control. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure in a mitral valve repair device that can capture and fix;

[0024] Figure 2 It is a schematic top view of a mitral valve repair device that can capture and fix;

[0025] Figure 3 It is a schematic diagram of the exposed structure in a mitral valve repair device that can capture and fix;

[0026] Figure 4 It is a schematic diagram of the structure of a part of the exposed structure in a mitral valve repair device that can capture and fix;

[0027] Figure 5 It is a schematic diagram of the structure of the capture structure in the retracted state in a mitral valve repair device that can capture and fix;

[0028] Figure 6 It is a schematic diagram of the structure of the capture structure in the capture state in a mitral valve repair device that can capture and fix;

[0029] Figure 7 It is a front view of a mitral valve repair device that can capture and fix.

[0030] In the figure: 10, traction rod; 20, stretching wire; 21, key structure; 22, traction ring; 23, rotating ring; 24, adjustable blade; 25, fixing block one; 26, hinge shaft one; 27, expansion link one; 28, connecting shaft one; 29, support rod; 210, extension block; 211, magnetic attraction seat; 212, limiting notch; 213, fixing block two; 214, hinge shaft two; 215, expansion link two; 216, connecting shaft two; 217, folding sponge; 31, upper plate; 32, lower plate; 33, support arm one; 34, support arm two; 35, capture arm; 36, disassembly and assembly block; 37, anti - detachment thorn; 38, spring; 39, telescopic rod; 310, blocking thread part. DETAILED DESCRIPTION OF THE INVENTION

[0031] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0032] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0033] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0034] Reference Figures 1-7 , Embodiment 1:

[0035] A captureable and fixable mitral valve repair device includes a revealing structure;

[0036] The exposure structure includes a stretching wire 20 inserted into the exposure cavity of the posterior head-side incision of the superior vena cava, the stretching wire 20 is fixedly connected to a traction ring 22 by a lock-key structure 21, a coaxial rotating ring 23 is arranged on one side of the traction ring 22, four adjustable blades 24 are arranged on the outer side of the rotating ring 23, and the four adjustable blades 24 are respectively located at the head end of the atrioventricular incision, the tail end of the atrioventricular incision, and the middle part of the atrioventricular incision;

[0037] It also includes a capture structure. When the capture structure is expanded and exposed by the exposure structure, the capture structure in the retracted state sequentially penetrates the rotating ring 23 and the traction ring 22 of the exposure structure, and extends from the side of the traction ring 22 away from the rotating ring 23. The capture structure is expanded from the retracted state to the capture state;

[0038] It also includes a traction rod 10 , and the revealing structure and the capturing structure are detachably connected to the traction rod 10 .

[0039] In this embodiment, before the patient is exposed and captured for mitral valve repair, the patient is induced by standard techniques and intubated by a single-lumen endotracheal tube, and a transesophageal echo probe is placed to perform a preliminary assessment of the valve, so as to estimate in advance the expansion distance of the subsequent adjustable blade 24 for mitral valve exposure;

[0040] Based on the above, the pericardium is incised on the right side of the midline of the human body. After the pericardial reflection of the superior vena cava is incised, a catheter is placed through the right atrial appendage and directly enters the superior vena cava for assisted venous drainage, providing a dry field of view and avoiding air block. At this time, the left atrial incision is made from the junction of the left atrium and the right superior pulmonary vein to the right side behind the superior vein. Then, the traction rod 10 is slowly inserted. During the insertion process, the traction line 20 is pulled by another operator. After the traction rod 10 and the traction line 20 are placed in the ideal position, the four adjustable blades 24 maximize the incision area of the left atrium and provide consistent exposure on this basis. After the maximum exposure of the left atrial incision area, the capture structure penetrates the exposed structure and slides down to the bottom of the traction rod 10. At this time, the capture structure is operated to complete the capture of the valve leaf.

[0041] In order to maximize the incision area of the left atrium by the four adjustable blades 24, fixing blocks one 25 are distributed in an array at the center of the outer end face of the traction ring 22. The fixing blocks one 25 are fixedly connected to the traction ring 22. The fixing blocks one 25 correspond to the adjustable blades 24 one by one. Each fixing block one 25 is respectively hinged to an expansion link one 27 through a hinge shaft one 26. One end of each expansion link one 27 is respectively hinged to a connecting shaft one 28, and the end of each connecting shaft one 28 away from the expansion link one 27 is hinged to the corresponding support rod 29. Each support rod 29 is fixedly installed in the corresponding extension block 210.

[0042] Each extension block 210 is fixedly installed on the corresponding magnetic suction seat 211. A limit notch 212 is provided on the outer end face of each magnetic suction seat 211. The four adjustable blades 24 are magnetically attracted inside the corresponding limit notch 212.

[0043] The adjustable blades 24 in the exposed structure can be selected as titanium alloy or aluminum alloy. Except for the adjustable blades 24, the exposed structure is made of aluminum alloy.

[0044] It should be noted that the aluminum alloy used except for the adjustable blades 24 is to reduce the overall weight of the exposed structure. Because the exposure method of the exposed structure during the operation needs to be lifted and lowered manually by traction, if the weight is too large, it is very easy to cause excessive load on the doctor's hand during a long operation.

[0045] On the outer end face of the rotating ring 23, fixing blocks two 213 with the same number as the fixing blocks one 25 are arranged in an array. Each fixing block two 213 is respectively hinged to an expansion link two 215 through a hinge shaft two 214. The other end of each expansion link two 215 is connected to the support rod 29 through a connecting shaft two 216.

[0046] In this embodiment, since the traction ring 22 has a relatively small diameter, the rotating ring 23 and the traction ring 22 penetrate into the left atrial incision site under the action of the stretching wire 20. At this time, because the left atrial incision site is not dilated, the traction ring 22 enters the left atrial incision site, while the rotating ring 23 has a relatively large diameter and is blocked by some tissues from entering at this time. At this time, manual intervention is used to peel off some unseparated tissues, and the rotating ring 23 is pulled. The stretching wire 20 pulls, so the stretching wire 20 drives the traction ring 22 to rotate. At the same time, the traction ring 22 drives the rotating ring 23 to rotate. To avoid the rotating ring 23 causing harm to the holding object by the guide piece when manually intervening to peel off some unseparated tissues, the end face of the adjustable blade 24 close to the outer wall of the traction ring 22 is a blunt edge. During the downward movement of the traction ring 22, the first fixing block 25 is respectively hinged to the first expansion connecting rod 27 through the first hinge shaft 26. During the downward movement of the first expansion connecting rod 27, the support rod 29 is pulled and expanded towards the circular outside. Then, due to the action of the second fixing block 213, the second hinge shaft 214 and the second expansion connecting rod 215, the adjustable blade 24 is finally expanded until the left atrial incision area is maximally exposed, achieving a linkage effect;

[0047] As shown in the appendix Figure 2 As shown, the four adjustable blades 24 and the traction ring 22 form a filling area, and a folded sponge 217 is placed in the filling area.

[0048] In this step 1, the folded sponge 217 is placed between the heart apex and the pericardium to expose the anterolateral papillary muscle. At this time, the pressure in the right ventricular outflow tract of the heart will help expose the annular structure at the anterolateral commissure.

[0049] In this application, the capturing structure includes an upper plate 31 and a lower plate 32. The traction rod 10 penetrates through the upper plate 31 and the lower plate 32, and the upper plate 31 and the lower plate 32 slide with the traction rod 10. The first support arms 33 are symmetrically arranged at the left and right ends of the upper plate 31, and the second support arms 34 are symmetrically arranged at the left and right ends of the lower plate 32.

[0050] On one side of each of the second support arms 34, a capturing arm 35 is provided. An assembly and disassembly block 36 is provided between two adjacent groups of capturing arms 35. An anti - detachment thorn 37 is provided at the top of the assembly and disassembly block 36. The assembly and disassembly block 36 is slidably installed in the sliding groove of the second support arm 34. A telescopic rod 39 with a spring 38 sleeved thereon is provided in the sliding groove. The telescopic rod 39 used is made of metal strip material. Because the metal strip has a memory function and a straightening function after being shaped, the telescopic end of the telescopic rod 39 abuts against the assembly and disassembly block 36 in the initial state.

[0051] Furthermore, the telescopic rod 39 abuts against the disassembly and assembly block 36, thereby completing the fixing function of the anti-thorn 37. During later disassembly, assembly, and cleaning, the sleeved spring 38 is toggled to contract, at which time the telescopic rod 39 is squeezed, quickly completing the abutment against the disassembly and assembly block 36, thereby improving the convenience of installation and disassembly. Furthermore, by different selections of the telescopic rod 39 and the spring 38, the position of the disassembly and assembly block 36 is swapped, so as to perform corresponding processing according to the specific conditions of the patient and the preliminary evaluation of the valve, improving the adaptability and compatibility of the device, and laying a foundation for precise and safe mitral valve repair.

[0052] In the present application, the first arm 33, the second arm 34, and the capture arm 35 are all connected by pins, enabling relative rotation between the first arm 33, the second arm 34, and the capture arm 35. Moreover, the first arm 33 and the upper plate 31, as well as the second arm 34 and the lower plate 32, are also connected by pins, enabling relative rotation between the first arm 33 and the upper plate 31, and relative rotation between the second arm 34 and the lower plate 32. A blocking thread portion 310 is provided at the bottom of the traction rod 10, and a thread groove matching the blocking thread portion 310 is provided at the inner hole of the lower plate 32. Moreover, through regions for the upper plate 31 and the lower plate 32 to penetrate exist in the regions formed by the inner walls of the traction ring 22 and the rotating ring 23 and the outer wall of the traction rod 10, so that the capture structure in the closed state slides along the traction rod 10 and sequentially penetrates through the rotating ring 23 and the traction ring 22 of the exposure structure.

[0053] It should be noted that in this embodiment, after the upper plate 31 and the lower plate 32 slide to the bottom on the traction rod 10, because the thread groove at the bottom of the lower plate 32 matches the blocking thread portion 310, the lower plate 32 needs to rotate to continue to descend. Therefore, the lower plate 32 stops at the blocking thread portion 310. At this time, the downward movement of the upper plate 31 causes the first arm 33, the second arm 34, and the capture arm 35 to press down and rotate. At this time, controlling the height of the upper plate 31 on the traction rod 10 can control the size of the capture space within the capture structure, that is, the rotation amplitude of the capture arm 35. The capture structure changes from the closed state to the capture state, and the two leaflets of the mitral valve are simultaneously captured through precise control.

[0054] In summary, the exposure structure and the capture structure are integrated into one through the traction rod 10. Therefore, after the exposure in the mitral valve repair surgery is completed, the mitral valve can be quickly captured according to the exposure result and the prior estimation. The capture position and the capture space are both adjusted by the doctor according to the actual situation, reducing the time and operation risk of the repair surgery.

[0055] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0056] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mitral valve repair device capable of being captured and fixed, characterized in that: Includes exposed structures; The exposure structure comprises a stretching line (20) inserted into the exposure cavity of the posterior head-side incision of the superior vena cava, the stretching line (20) being fixedly connected to a traction ring (22) by a lock-key structure (21), a coaxial rotating ring (23) being arranged on one side of the traction ring (22), four adjustable blades (24) being arranged on the outside of the rotating ring (23), the four adjustable blades (24) being respectively located at the head end of the atrioventricular incision, the tail end of the atrioventricular incision, and the middle part of the atrioventricular incision; It also includes a capture structure, and when the revealing structure is expanded and exposed, the capture structure sequentially penetrates the rotating ring (23) and the traction ring (22), and the capture structure is expanded from a retracted state to a capture state; It also comprises a traction rod (10), the revealing structure and the capturing structure being detachably connected to the traction rod (10); The outer wall end surface of the traction ring (22) is provided with a fixed block (25) arranged in an array at the center of the circle. Each of the fixed blocks (25) is respectively hinged to an expansion link (27) via a hinge shaft (26). The fixed block (25) is fixedly connected to the traction ring (22). The fixed block (25) corresponds to the adjustable blade (24) one by one. One end of each expansion link (27) is respectively hinged to a connecting shaft (28). One end of each connecting shaft (28) away from the expansion link (27) is hinged to a corresponding support rod (29). Each support rod (29) is fixedly installed in a corresponding extension block (210). Each of the extension blocks (210) is fixedly mounted on a corresponding magnetic seat (211); an outer end surface of the magnetic seat (211) is provided with a limiting notch (212); and the four adjustable blades (24) are magnetically attracted inside the corresponding limiting notch (212); The rotating ring (23) is provided with an array of fixed blocks 2 (213) whose number is the same as that of fixed blocks 1 (25) arranged on the outer end surface thereof; each of the fixed blocks 2 (213) is respectively hingedly connected to an expansion connecting rod 2 (215) via a hinge shaft 2 (214); and the other end of each expansion connecting rod 2 (215) is connected to a support rod (29) via a connecting shaft 2 (216).

2. A captureable and fixable mitral valve repair device according to claim 1, characterized in that: The adjustable blade (24) in the exposed structure is made of titanium alloy or aluminum alloy, and the exposed structure except the adjustable blade (24) is made of aluminum alloy.

3. The capture and fixable mitral valve repair device according to claim 1, characterized in that: The four adjustable blades (24) and the traction ring (22) form a filling area, and a folded sponge (217) is placed in the filling area.

4. The capture and fixable mitral valve repair device according to claim 1, characterized in that: The capture structure comprises an upper plate (31) and a lower plate (32), the traction rod (10) passes through the upper plate (31) and the lower plate (32), and the upper plate (31) and the lower plate (32) slide with the traction rod (10), a first support arm (33) is symmetrically arranged at the left and right ends of the upper plate (31), and a second support arm (34) is symmetrically arranged at the left and right ends of the lower plate (32).

5. A captureable and fixable mitral valve repair device according to claim 4, characterized in that: A capture arm (35) is provided on one side of the second support arm (34); a disassembly block (36) is provided between two adjacent groups of the capture arms (35); a puncture prevention device (37) is provided at the top of the disassembly block (36); the disassembly block (36) is slidably mounted on a sliding groove inside the second support arm (34); a telescopic rod (39) on which a spring (38) is sleeved is provided in the sliding groove; and in an initial state, the telescopic end of the telescopic rod (39) abuts against the disassembly block (36).

6. A captureable and fixable mitral valve repair device according to claim 5, characterized in that: The support arm 1 (33) is connected to the support arm 2 (34) and the capture arm (35) by means of a latch, and the support arm 1 (33) is connected to the upper plate (31) and the support arm 2 (34) is connected to the lower plate (32) by means of a latch. The bottom of the traction rod (10) is provided with a blocking threaded portion (310), and a threaded groove matching the blocking threaded portion (310) is provided at an internal hole of the lower plate (32), and the inner walls of the traction ring (22) and the rotating ring (23) and the outer wall of the traction rod (10) are provided with a penetration area for the upper plate (31) and the lower plate (32) to penetrate.

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