Capturable and fixable mitral valve repair device

Abstract

Disclosed in the present invention is a capturable and fixable mitral valve repair device. The present invention relates to the technical field of mitral valve repair devices. The capturable and fixable mitral valve repair device comprises an exposure structure. The exposure structure comprises a traction line, the traction line is fixedly connected to a traction ring by means of a lock-and-key structure, a coaxial rotating ring is arranged on one side of the traction ring, and an adjustable blade is arranged outside the rotating ring. Said device further comprises a capture structure. The capture structure penetrates through the exposure structure during the expansion and exposure of the exposure structure, and the capture structure is unfolded from a folded state to a capture state. Said device further comprises a traction rod. The exposure structure and the capture structure are both located on the traction rod. According to the present invention, by means of integrating the exposure structure and the capture structure into a whole by the traction rod, after completing the exposure in mitral valve repair surgery, the mitral valve can be rapidly captured according to an exposure result and pre-estimation. A capture position and a capture space can be adjusted by a doctor according to actual conditions, thereby reducing the duration and operation risks of the repair surgery.

Description

A capturable and fixable mitral valve repair device TECHNICAL FIELD

[0001] The present application relates to the technical field of mitral valve repair devices, in particular to a capturable and fixable mitral valve repair device. BACKGROUND

[0002] Mitral regurgitation (MR) is the most common valvular disease. According to epidemiological data in Europe and the United States, the prevalence of MR in people over 75 years old is as high as 10%, which is significantly higher than that of aortic valve disease. Similarly, with the aggravation of the disease process of population aging in China, mitral regurgitation disease will also cause a heavy medical burden. Mitral valve repair or replacement is the gold standard for MR treatment, but some studies show that as many as half of patients with severe MR do not choose surgical treatment, and the reason is largely related to the risk of surgery. This large group of patients with poor tolerance to surgical operation urgently needs a less invasive treatment method as an alternative, so interventional mitral valve treatment technology emerges as the times require. In the past decade, several transcatheter mitral valve repair techniques derived from different surgical procedures have emerged and are used to treat patients who are at high risk for surgery or cannot undergo surgery. Successful repair of the mitral valve includes several key factors, specifically: 1. accurate assessment of valvular dysfunction; 2. sustained good exposure of the mitral valve; 3. accurate application of repair techniques; 4. intraoperative assessment of repair results; transesophageal echocardiography and valve shell examination to determine the specific mechanism of dysfunction, and exposure of the mitral valve through an atrial lateral incision and capture operation as needed.

[0003] As disclosed in a kind of mitral valve repair device of Chinese patent publication No. CN213217910U, the repair device has a distraction state and a capture state, the first end of support structure is detachably connected with driving structure, the first end can be driven to the second end of support structure under the driving of driving structure, so that support structure is in distraction state, and support structure is configured to be able to automatically restore to capture state when the first end is separated from driving structure, two capture arms are symmetrically arranged on the two sides of support structure, one end of capture arm is connected to support structure, and the other end forms capture space with support structure, and when support structure is switched from distraction state to capture state, two capture spaces are all changed from large to small to capture two leaflets of mitral valve simultaneously. The mitral valve repair device not only has simple structure, low production difficulty and low cost, but also is easy to operate and has low requirements for doctors.

[0004] In the process of exposure in the repair, the clamp type repair device lacks corresponding exposure structure, and it is difficult to ensure the continuity of intraoperative exposure during clamping. Therefore, the above repair device often needs to capture while pulling the exposure during mitral valve repair, which increases the operation requirements of the doctor during mitral valve repair surgery, and it is difficult to integrate the capture and exposure structure, so that the operation instrument is too much, which increases the repair operation time and operation risk. SUMMARY

[0005] In view of the defects of the prior art, the present application provides a captureable and fixed mitral valve repair device, which solves the problems raised in the above background art.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme: a captureable and fixed mitral valve repair device, comprising an exposure structure;

[0007] The exposure structure comprises a traction line at the exposure chamber cut on the head side behind the superior vena cava, the traction line is fixedly connected with a traction ring by a lock key structure, one side of the traction ring is provided with a rotating ring coaxial with the traction ring, four adjustable blades are arranged outside the rotating ring, and the four adjustable blades are respectively located at the head end of atrioventricular incision, the tail end of atrioventricular incision and the middle part of atrioventricular incision;

[0008] Further comprising a capture structure, the capture structure is sequentially penetrated through the rotating ring and the traction ring when the exposure structure is expanded and exposed, and the capture structure is expanded from the retracted state to the capture state;

[0009] Further comprising a capture structure, the capture structure is sequentially penetrated through the rotating ring and the traction ring when the exposure structure is expanded and exposed, and the capture structure is expanded from the retracted state to the capture state;

[0010] Also include the traction rod, the exposed structure and the capture structure are detachably connected on the traction rod; before the patient carries out the mitral valve repair by the exposed structure and the capture structure, the patient is induced by the standard technique and is cannulated by the single lumen trachea, the transesophageal echo probe is placed, the valve is preliminarily evaluated, the subsequent adjustable blade for the expansion distance of the exposure of the mitral valve is estimated in advance, and on the basis of the above, the pericardium is incised on the right side of the human body midline, the pericardial reflection of the superior vena cava is incised, the catheter is placed through the right auricle, directly enters the superior vena cava to assist the venous drainage, provides a dry field and avoids air blockage, at this time, the left atrial incision is incised 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 explored, the traction wire is pulled by another operator during the exploration process, after the traction rod and the traction wire are placed in the ideal position, the four adjustable blades maximize the expansion of the left atrial incision area, and on this basis, consistent exposure is provided, after the left atrial incision area is maximally exposed, the capture structure is slid down to the bottom of the traction rod, and the capture of the valve leaflet is completed by operating the capture structure.

[0011] Further improvement of the technical scheme of the present application is that the outer wall end face circle center array of the traction ring has a fixed block one, each fixed block one is hinged to an expansion connecting rod one through a hinge shaft one, one end of each expansion connecting rod one is hinged to a connecting shaft one, and the end of each connecting shaft one away from the expansion connecting rod one is hinged to a corresponding support rod, and each support rod is fixedly installed in a corresponding extension block.

[0012] Further improvement of the technical scheme of the present application is that each extension block is fixedly installed on a corresponding magnetic attraction seat, the outer end face of each magnetic attraction seat is provided with a limiting notch, and four adjustable blades are magnetically attracted to the inside of the corresponding limiting notch.

[0013] Further improvement of the technical scheme of the present application is that the adjustable blade in the exposed structure can be selected from titanium alloy or aluminum alloy, and the exposed structure adopts aluminum alloy except the adjustable blade, wherein it is to be noted that the aluminum alloy except the adjustable blade is used to reduce the weight of the whole exposed structure, because the exposed structure needs to be lifted and lowered by manual traction during the operation, and therefore, if the weight is too large, it is easy to cause the doctor's hand to bear too much weight during a long operation.

[0014] Further improvement of the technical scheme of the application is that the rotating ring is externally provided with an array of fixed blocks two, which is the same in number as the fixed blocks one, each of the fixed blocks two is hingedly connected with an expansion connecting rod two through a hinge shaft two, and each of the expansion connecting rod two is connected with a support rod at the other end through a connecting shaft two; the rotating ring and the traction ring are inserted into the left atrium incision site under the action of the traction line, at this time, the left atrium incision site is not expanded, so the rotating ring is partially blocked by the tissue, at this time, the artificial intervention peels off part of the undetached tissue, holds the rotating ring, and pulls the traction line, so that the traction line pulls the traction ring up and down, and the expansion connecting rod one pulls and stretches the support rod to the outside of the circle in the process of descending, and vice versa, so that the adjustable blade is expanded finally due to the effect of the fixed blocks two, the hinge shaft two and the connecting rod two, until the left atrium incision area is maximally exposed, and the linkage effect is achieved.

[0015] Further improvement of the technical scheme of the application is 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 apex of the heart and the pericardium, and the anterior lateral papillary muscle is exposed, at this time, the pressure of the right ventricular outflow tract of the heart will help to expose the annular structure of the anterior lateral commissure.

[0016] Further improvement of the technical scheme of the application is that the capturing structure comprises 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 with the traction rod, the upper plate is symmetrically provided with a support arm one at the left and right ends, and the lower plate is symmetrically provided with a support arm two at the left and right ends.

[0017] Further improvement of the technical scheme of the application is that the support arm two is provided with a capturing arm on one side, a disassembling block is arranged between two groups of adjacent capturing arms, the disassembling block is provided with an anti-disengagement thorn at the top, the disassembling block is slidingly installed in a sliding groove in the support arm two, a telescopic rod with a spring sleeved thereon is arranged in the sliding groove, and the telescopic rod abuts against the disassembling block in the initial state, so that the telescopic rod abuts against the disassembling block, thereby completing the fixing effect of the anti-disengagement thorn, and in the later disassembly and cleaning, the sleeved spring is contracted, at this time, the telescopic rod is squeezed, and the abutment of the disassembling block is quickly completed, thereby improving the convenience of installation and disassembly, and further, the position of the disassembling block is exchanged according to the different selection of the telescopic rod and the spring, so that the corresponding treatment is carried out according to the specific condition of the patient and the preliminary evaluation of the valve, the adaptability and compatibility of the device are improved, and the foundation for accurate and safe mitral valve repair is laid.

[0018] Further improvement of the technical scheme of the present application is that the branch arm one, the branch arm two and the capturing arm are all connected by a latch, and the branch arm one and the upper plate and the branch arm two and the lower plate are also connected by a latch, the bottom of the traction rod is provided with a blocking threaded part, the inside hole of the lower plate is provided with a threaded groove matched with the blocking threaded part, and the inner wall of the traction ring and the rotating ring and the outer wall of the traction rod all have a through area for the upper plate and the lower plate to pass through, after the upper plate and the lower plate slide to the bottom of the traction rod, because the threaded groove at the bottom of the lower plate is matched with the blocking threaded part, the lower plate needs to be rotated to continue to descend, so the lower plate stops at the blocking threaded part, the descent of the upper plate at this time makes the branch arm one, the branch arm two and the capturing arm press down and rotate, at this time, the height of the upper plate on the traction rod can be controlled to control the size of the capturing space in the capturing structure, that is, the rotating amplitude of the capturing arm, the capturing structure changes from a retracted state to a capturing state, and two leaflets of the mitral valve are captured at the same time through accurate control.

[0019] Compared with the prior art, the present application has the beneficial effects that the exposing structure and the capturing structure are integrated by the traction rod, after the mitral valve repair surgery is completed, the capturing of the mitral valve can be quickly performed according to the exposure result and the prior estimation, the capturing position and the capturing space are adjusted by the doctor according to the actual situation, and the time and the operation risk of the repair surgery are reduced.

[0020] By slowly inserting the traction rod, the traction line is pulled by another operator during the insertion, 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 consistent exposure is provided on this basis, after the incision area of the left atrium is maximally exposed, the capturing structure slides down to the bottom of the traction rod, and the capturing structure completes the capturing of the leaflets.

[0021] By pulling the spring retraction, the telescopic rod is squeezed at this time, the abutment of the disassembly block is quickly completed, and then the convenience of installation and disassembly is improved, further, the position of the disassembly block is exchanged according to different selection of the telescopic rod and the spring, so that corresponding processing is performed according to the specific condition of the patient and the preliminary evaluation of the valve, the adaptability and compatibility of the device are improved, and a foundation is laid for accurate and safe mitral valve repair.

[0022] By controlling the height of the upper plate on the traction rod, the size of the capturing space in the capturing structure can be controlled, that is, the rotating amplitude of the capturing arm, the capturing structure changes from a retracted state to a capturing state, and two leaflets of the mitral valve are captured at the same time through accurate control. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a schematic view of the overall structure of the device for capturing and fixing the mitral valve repair;

[0024] Fig. 2 is a schematic view of the device for capturing and fixing the mitral valve repair from the top;

[0025] Fig. 3 is a schematic view of a portion of the structure of the capturable and fixable mitral valve repair device;

[0026] Fig. 4 is a schematic view of a portion of the structure of the capturable and fixable mitral valve repair device;

[0027] Fig. 5 is a schematic view of the structure of the capturable and fixable mitral valve repair device in a retracted state of the capture structure;

[0028] Fig. 6 is a schematic view of the structure of the capturable and fixable mitral valve repair device in a captured state of the capture structure;

[0029] Fig. 7 is a front view of the capturable and fixable mitral valve repair device.

[0030] Fig. 10, traction rod; 20, traction wire; 21, lock key structure; 22, traction ring; 23, rotating ring; 24, adjustable blade; 25, fixed block one; 26, hinged shaft one; 27, expansion connecting rod one; 28, connecting shaft one; 29, support rod; 210, extension block; 211, magnetic seat; 212, limiting notch; 213, fixed block two; 214, hinged shaft two; 215, expansion connecting rod two; 216, connecting shaft two; 217, folded sponge; 31, upper plate; 32, lower plate; 33, support arm one; 34, support arm two; 35, capture arm; 36, disassembly block; 37, anti-escape thorn; 38, spring; 39, telescopic rod; 310, blocking threaded portion. DETAILED DESCRIPTION

[0031] Various exemplary embodiments, features, and aspects of the present application will be described herein below with reference to the drawings. The same reference numbers in different drawings represent the same or similar elements. Although various aspects of embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0032] The term "exemplary" is used herein in the sense of being an example, instance, or illustration. Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0033] In addition, numerous specific details are given herein in order to provide a thorough understanding of the present application. Those of ordinary skill in the relevant art will recognize that the application can be practiced without the specific details included herein. In some instances, well-known methods, procedures, components, and elements have not been described in detail in order to avoid obscuring aspects of the present application.

[0034] Referring to Figs. 1-7, Embodiment One:

[0035] A capturable and fixable mitral valve repair device, comprising a revealing structure;

[0036] The exposing structure includes a traction line 20 exposed at the exposing chamber cut open at the head side behind the superior vena cava, the traction line 20 is fixedly connected with a traction ring 22 by a lock key structure 21, one side of the traction ring 22 is provided with a rotating ring 23 coaxial with the traction ring 22, four adjustable blades 24 are arranged outside the rotating ring 23, and the four adjustable blades 24 are respectively located at the head end of the atrioseptostomy, the tail end of the atrioseptostomy and the middle part of the atrioseptostomy;

[0037] The exposing structure also includes a capturing structure, when the exposing structure is expanded and exposed, the capturing structure in the retracted state penetrates the rotating ring 23 and the traction ring 22 of the exposing structure in turn, and extends from the side of the traction ring 22 away from the rotating ring 23, and the capturing structure is expanded from the retracted state to the capturing state.

[0038] The exposing structure and the capturing structure are detachably connected with a traction rod 10.

[0039] In this embodiment, before the exposing structure and the capturing structure perform the mitral valve repair, the patient is induced by standard technology and is intubated by a single lumen tracheal tube, an echocardiographic probe is placed, the valve is preliminarily evaluated, and the expansion distance of the adjustable blades 24 for the exposure of the mitral valve is estimated in advance.

[0040] On the basis of the above, the pericardium is cut open on the right side of the body midline, the pericardial reflection of the superior vena cava is cut open, a catheter is placed through the right atrial appendage, directly enters the superior vena cava to assist the venous drainage, provides a dry field and avoids air blockage, at this time, the left atriotomy is cut open 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 10 is slowly inserted, the traction line 20 is pulled by another operator during the insertion process, after the traction rod 10 and the traction line 20 are placed in the ideal position, the four adjustable blades 24 maximally expand the incision area of the left atrium, and consistent exposure is provided on this basis, after the left atriotomy area is maximally exposed, the capturing structure penetrates the exposing structure and slides down to the bottom of the traction rod 10, at this time, the capturing structure is operated to complete the capture of the valve leaflet.

[0041] In order to realize the maximum expansion of the incision area of the left atrium by the four adjustable blades 24, a fixed block one 25 is arranged on the outer wall end face of the traction ring 22 in a circular center array, the fixed block one 25 is fixedly connected with the traction ring 22, the fixed block one 25 corresponds to the adjustable blade 24 one by one, each fixed block one 25 is hingedly connected with an expansion connecting rod one 27 through a hinged shaft one 26, one end of each expansion connecting rod one 27 corresponds to a connecting shaft one 28 hingedly connected, and one end of each connecting shaft one 28 away from the expansion connecting rod one 27 is hingedly connected with a corresponding support rod 29, and each support rod 29 is fixedly installed in the corresponding extension block 210.

[0042] Each extension block 210 is fixedly installed on a corresponding magnetic seat 211, and the outer end face of each magnetic seat 211 is provided with a limiting recess 212, and the four adjustable blades 24 are magnetically attracted to the inside of the corresponding limiting recess 212.

[0043] The exposed structure can select titanium alloy or aluminum alloy for the adjustable blade 24, and the exposed structure adopts aluminum alloy except for the adjustable blade 24.

[0044] It should be noted that the aluminum alloy is used except for the adjustable blade 24 in order to reduce the weight of the whole exposed structure, because the exposed structure needs to be exposed in the surgery by artificial traction lifting and lowering, and therefore, if the weight is too large, it is easy to cause the doctor's hand to bear too much weight in a long time of surgery.

[0045] The outer end face of the rotating ring 23 is arrayed with the same number of fixed blocks two 213 as the fixed blocks one 25, each fixed block two 213 is hinged to the expansion connecting rod two 215 through the hinge shaft two 214, and the other end of each expansion connecting rod two 215 is connected to the support rod 29 through the connecting shaft two 216.

[0046] In the embodiment, since the traction ring 22 has a relatively small diameter, the rotating ring 23 and the traction ring 22 are inserted into the left atrial incision site under the action of the traction line 20, at this time, because the left atrial incision site is not expanded, the traction ring 22 enters the left atrial incision site, and the rotating ring 23 is partially blocked by the tissue at this time, and the rotating ring 23 is partially blocked by the tissue at this time. At this time, the artificial intervention peels off part of the separated tissue, pulls the traction rotating ring 23, and then the traction line 20 pulls the traction ring 22 to rotate, at the same time, the traction ring 22 drives the rotating ring 23 to rotate, in order to avoid the rotating ring 23 causing damage to the holding object of the guide blade when the artificial intervention peels off part of the separated tissue, the end face of the adjustable blade 24 close to the outer wall of the traction ring 22 is blunt, and the fixed blocks one 25 are hinged to the expansion connecting rod one 27 through the hinge shaft one 26 during the descending process of the traction ring 22, the expansion connecting rod one 27 expands the support rod 29 to the circular outer side during the descending process, and then the adjustable blade 24 is finally expanded due to the action of the fixed blocks two 213, the hinge shaft two 214 and the expansion connecting rod two 215, until the left atrial incision area is maximally exposed, achieving the linkage effect.

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

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

[0049] In the application, the capturing structure includes the upper plate 31 and the lower plate 32, the traction rod 10 penetrates 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 upper plate 31 is symmetrically provided with the first supporting arm 33 at the left and right ends, and the lower plate 32 is symmetrically provided with the second supporting arm 34 at the left and right ends.

[0050] The first supporting arm 33 is provided with the capturing arm 35 at one side, and the second supporting arm 34 is provided with the dismounting block 36 between two groups of adjacent capturing arms 35. The dismounting block 36 is provided with the anti-dropping thorn 37 at the top, is slidingly installed in the sliding groove of the second supporting arm 34, and is provided with the telescopic rod 39 with the spring 38 sleeved thereon in the sliding groove. The telescopic rod 39 is made of metal strip material, has the memory function and the straightening function after being shaped, and thus the telescopic end of the telescopic rod 39 in the initial state abuts against the dismounting block 36.

[0051] Further, the telescopic rod 39 abuts against the dismounting block 36, thereby completing the fixing function of the anti-dropping thorn 37. In the later dismounting and cleaning, the sleeved spring 38 is contracted, at which time the telescopic rod 39 is pressed, the abutment of the dismounting block 36 is quickly completed, and the convenience of installation and dismounting is improved. Further, the position of the dismounting block 36 is exchanged according to different selection of the telescopic rod 39 and the spring 38, thereby corresponding processing is performed according to the specific condition of the patient and the preliminary evaluation of the valve, the adaptability and compatibility of the device are improved, and the foundation for accurate and safe mitral valve repair is laid.

[0052] In the application, the first supporting arm 33, the second supporting arm 34 and the capturing arm 35 are all connected by the bolt, the relative rotation of the first supporting arm 33, the second supporting arm 34 and the capturing arm 35 is realized, the first supporting arm 33 and the upper plate 31 are connected by the bolt, the relative rotation of the first supporting arm 33 and the upper plate 31 is realized, the second supporting arm 34 and the lower plate 32 are connected by the bolt, and the relative rotation of the second supporting arm 34 and the lower plate 32 is realized. The bottom of the traction rod 10 is provided with the blocking threaded part 310, the inner hole of the lower plate 32 is provided with the threaded groove matched with the blocking threaded part 310, and the area formed by the inner wall of the traction ring 22 and the rotating ring 23 and the outer wall of the traction rod 10 all has the penetrating area for the upper plate 31 and the lower plate 32 to penetrate, thereby the capturing structure in the gathering state slides along the traction rod 10, and sequentially penetrates the rotating ring 23 and the traction ring 22 of the exposed structure.

[0053] It should be noted that in the present embodiment, after the upper plate 31 and the lower plate 32 slide to the bottom of the traction rod 10, because the threaded groove at the bottom of the lower plate 32 matches the blocking threaded part 310, the lower plate 32 needs to be rotated to continue to descend, so the lower plate 32 stops at the blocking threaded part 310, and the descent of the upper plate 31 at this time causes the arm 33, the arm 34 and the capture arm 35 to be pressed and rotated, at this time, the height of the upper plate 31 on the traction rod 10 can control the size of the capture space in the capture structure, that is, the rotation range of the capture arm 35, and the capture structure changes from the folded state to the capture state, and the two leaflets of the mitral valve are captured at the same time through accurate control.

[0054] In summary, the exposing structure and the capture structure are integrated into one through the traction rod 10, so that after the mitral valve repair surgery is exposed, the capture of the mitral valve can be quickly performed according to the exposure result and the prior estimation, and the capture position and the capture space are adjusted by the doctor according to the actual situation, thereby reducing the time and operation risk of the repair surgery.

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

[0056] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A capturable and fixable mitral valve repair device, characterized by: Include the structure of the structure; The structure includes the structure of the structure, which is inserted into the upper vena cava and the head side of the incision behind the chamber, which is connected with the traction ring (22) by the lock key structure (21), and the traction ring (22) is provided with a rotating ring (23) coaxially on one side, and four adjustable blades (24) are arranged outside 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; Also includes the capture structure, the capture structure is sequentially penetrated through the rotating ring (23) and the traction ring (22) when the exposure structure is expanded and exposed, and the capture structure is expanded to the capture state in the folding state; Also includes a traction rod (10), the exposure structure and the capture structure are detachably connected with the traction rod (10); The outer wall end face of the traction ring (22) is arranged with a fixed block one (25), each fixed block one (25) is hinged with an expansion connecting rod one (27) through a hinge shaft one (26), the fixed block one (25) and the traction ring (22) are fixedly connected, the fixed block one (25) corresponds to the adjustable blade (24), one end of each expansion connecting rod one (27) is hingedly connected with a connecting shaft one (28), and the end of each connecting shaft one (28) away from the expansion connecting rod one (27) is hingedly connected with a corresponding support rod (29), and each support rod (29) is fixedly installed in a corresponding extension block (210); Each extension block (210) is fixedly installed on a corresponding magnetic suction seat (211), and the outer end face of the magnetic suction seat (211) is provided with a limiting recess (212), and the four adjustable blades (24) are magnetically attracted to the inside of the limiting recess (212); The outer end face of the rotating ring (23) is arranged with a same number of fixed blocks two (213) as the fixed blocks one (25), each fixed block two (213) is hingedly connected with an expansion connecting rod two (215) through a hinge shaft two (214), and the other end of each expansion connecting rod two (215) is connected with a support rod (29) through a connecting shaft two (216).

2. The capturable and securable mitral valve repair device of claim 1, wherein: The adjustable blade (24) in the exposure structure is made of titanium alloy or aluminum alloy, and the exposure structure is made of aluminum alloy except the adjustable blade (24).

3. The capturable and securable mitral valve repair device of claim 1, wherein: 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 capturable and securable mitral valve repair device of claim 1, wherein: The capture structure includes an upper plate (31) and a lower plate (32), the traction rod (10) penetrates 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 left and right ends of the upper plate (31) are symmetrically provided with a support arm one (33), and the left and right ends of the lower plate (32) are symmetrically provided with a support arm two (34).

5. The capturable and securable mitral valve repair device of claim 4, wherein: The two sides of the second supporting arm (34) are provided with catching arms (35), and two groups of adjacent catching arms (35) are provided with disassembling blocks (36), the top of the disassembling block (36) is provided with anti-dropping thorns (37), the disassembling block (36) is slidingly installed in a sliding groove in the second supporting arm (34), a telescopic rod (39) with a spring (38) sleeved thereon is arranged in the sliding groove, and the telescopic end of the telescopic rod (39) in the initial state abuts against the disassembling block (36).

6. The capturable and securable mitral valve repair device of claim 5, wherein: The first supporting arm (33), the second supporting arm (34) and the catching arm (35) are all connected by means of a bolt, the first supporting arm (33) and the upper plate (31) are connected by means of a bolt, the second supporting arm (34) and the lower plate (32) are also connected by means of a bolt, the bottom of the traction rod (10) is provided with a blocking threaded portion (310), the inner hole of the lower plate (32) is provided with a threaded groove matched with the blocking threaded portion (310), and the inner walls of the traction ring (22) and the rotating ring (23) and the outer wall of the traction rod (10) all have penetrating regions for the upper plate (31) and the lower plate (32) to penetrate.

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