CN113057764A

CN113057764A - Valve clamping device

Info

Publication number: CN113057764A
Application number: CN202110285842.6A
Authority: CN
Inventors: 阮成民; 肖建平; 翟梦林
Original assignee: Guangdong Pulse Medical Technology Co ltd
Current assignee: Guangdong Pulse Medical Technology Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-07-02

Abstract

The application relates to the technical field of medical equipment, in particular to a valve clamping device. The valve clamping device comprises a first clamping piece, a second clamping piece and a clamping piece, wherein the first clamping piece comprises a positioning part and a plurality of clamping pieces connected to the positioning part; the supporting assembly comprises a connecting piece, a supporting piece and an elastic piece; the first end of the connecting piece movably penetrates through the positioning part, and the second end of the connecting piece is connected with the supporting piece; the elastic piece is arranged on the connecting piece; the second clamping piece comprises a plurality of clamping arms, each clamping arm is respectively and rotatably connected with the positioning part and the support piece, and the clamping arms and the clamping pieces are arranged in a one-to-one corresponding mode; the connecting piece is pushed to move towards the direction far away from the positioning part, the elastic piece deforms, and the clamping arms move towards the direction far away from the corresponding clamping pieces so as to expand the valve clamping device; and releasing the connecting piece, wherein the elastic piece drives the clamping arms to move towards the direction close to the corresponding clamping pieces under the action of restoring force so as to close the valve clamping device. The valve clamping device is simple in structure, convenient to process and assemble, simple and convenient to operate, and high in reliability and safety.

Description

Valve clamping device

Technical Field

The application relates to the technical field of medical equipment, in particular to a valve clamping device.

Background

The mitral valve is a two-piece valve attached to the periphery of the ostium of the left ventricle and attached to the papillary muscles by chordae tendineae, which acts to prevent blood from the left ventricle from flowing back into the left atrium. Mitral Regurgitation (MR) is a condition in which the left ventricle fails to close completely upon contraction due to congenital abnormalities or acquired lesions, causing a portion of the blood flowing from the left atrium into the left ventricle to regurgitate back into the left atrium, causing a series of pathological changes and clinical symptoms in the heart, which, when severe, can lead to heart failure.

Currently, there are two major surgical and interventional therapies for mitral valve regurgitation treatment. The surgical operation has the disadvantages of large trauma, obvious postoperative pain, slow recovery, high risk and the like. Interventional therapy is largely divided into two categories, Transcatheter Mitral Valve Repair (TMVR) and Transcatheter Mitral Valve replacement (TMVI). The existing transcatheter mitral valve repair comprises edge-to-edge repair, artificial chordae tendineae implantation, annulus repair and the like, the principle is the same as that of a surgical operation, but the repair device is delivered to the mitral valve part through a minimally invasive approach such as femoral artery puncture or apical puncture, the original structure of the mitral valve is retained to the maximum extent, the safety is high, and the risk of relapse exists. Transcatheter mitral valve replacement, i.e., a prosthetic valve (primarily a biological membrane) delivered to the mitral valve via the femoral venous atrial septum or the apex, released and secured within the annulus to replace the diseased valve, appears to be less safe and risky for biological valve failure.

With the development of interventional therapy technology, transcatheter valve therapy, which has the advantages of light pain, quick recovery, less bleeding, and greatly reduced operative mortality and postoperative complication incidence of traditional operative contraindications or high-risk patients, will become the mainstream means of mitral valve reflux therapy.

However, the valve clamping device in the prior art has the problems that the self-locking device is too complicated, the assembling operation is troublesome, and the reliability and the safety are insufficient.

Disclosure of Invention

The present application aims to provide a valve clamping device to optimize the structure of the valve clamping device, and simultaneously improve the reliability and safety of the application of the valve clamping device.

In view of the above, the present application provides a valve clamping device comprising:

the first clamping piece comprises a positioning part and a plurality of clamping pieces connected to the positioning part; in a natural state, the clamping pieces have a tendency of being far away from each other;

the supporting assembly comprises a connecting piece, a supporting piece and an elastic piece; the first end of the connecting piece movably penetrates through the positioning part, and the second end of the connecting piece is connected with the supporting piece; the elastic piece is arranged on the connecting piece;

the second clamping piece comprises a plurality of clamping arms, each clamping arm is respectively and rotatably connected with the positioning part and the supporting piece, and the clamping arms and the clamping pieces are arranged in a one-to-one corresponding mode;

the connecting piece is pushed to move towards the direction far away from the positioning part, the elastic piece deforms, and the clamping arms move towards the direction far away from the corresponding clamping pieces so as to expand the valve clamping device; and releasing the connecting piece, wherein the elastic piece drives the clamping arms to move towards the direction close to the corresponding clamping pieces under the action of restoring force so as to close the valve clamping device.

In the above technical solution, optionally, the first clamping member includes two clamping pieces, the second clamping member includes two clamping arms, and the two clamping pieces and the two clamping arms are respectively disposed at two sides of the connecting member;

the connecting piece is T-shaped and comprises a first connecting part and a second connecting part which are vertically connected; one end of the first connecting part movably penetrates through the positioning part and forms a first end of the connecting part, and the other end of the first connecting part is connected with the second connecting part; the second connecting portion is connected to the support member and formed as a second end of the connecting member.

In any of the above technical solutions, optionally, the supporting member is V-shaped, two ends of the supporting member respectively form a connection location, the supporting member is respectively rotatably connected to the two clamping arms through the connection locations, and the bending end of the supporting member is connected to the second end of the connecting member;

the number of the supporting pieces is two, and the two supporting pieces are respectively arranged on two sides of the connecting piece.

In any of the above technical solutions, optionally, a positioning groove is formed at a connection portion of the clamping arm, where the connection portion is used for connecting with the positioning portion, and the clamping arm can be connected with the positioning portion at different positions of the positioning groove through a positioning member, so as to change the extension length of the clamping arm.

In any of the above technical solutions, optionally, the elastic member is a coil spring;

the spiral spring is sleeved on the first connecting part of the connecting piece, and two ends of the spiral spring are respectively connected with the positioning part and the second connecting part of the connecting piece; the connecting piece is pushed to move towards the direction far away from the positioning part, and the elastic piece is stretched and deformed.

In any of the above technical solutions, optionally, the elastic member is a torsion spring;

the torsion spring is sleeved on the second connecting part of the connecting piece, and two abutting ends of the torsion spring are respectively abutted against the side walls of the two clamping arms, which are away from the clamping piece; the connecting piece is pushed to move towards the direction far away from the positioning part, and the elastic piece is subjected to torsion deformation.

In any of the above technical solutions, optionally, the first clamping member further includes a control wire, a positioning hole is formed at an end of the clamping piece away from the positioning portion, and the control wire can movably pass through the positioning hole;

and a positioning turnover part turned towards the side deviating from the connecting piece is formed on the clamping piece, and the clamping piece is made of a nickel-titanium alloy material.

In any of the above solutions, optionally, the valve clamping device further comprises a mandrel, and the mandrel is detachably connected to the first end of the connecting member.

In any of the above aspects, optionally, the valve clamping device further comprises a release assembly;

the release assembly is arranged among the clamping pieces and comprises a first sleeve and a second sleeve which are clamped with each other, the first sleeve is sleeved outside the first end of the connecting piece and is connected with the positioning part, and the second sleeve is connected to one side, away from the positioning part, of the first sleeve; the mandrel is capable of being connected to the first end of the connector through the first sleeve and the second sleeve.

In any of the above technical solutions, optionally, a first detent extending in a radial direction is formed on the first sleeve, and a second detent capable of being engaged with the first detent is formed on the second sleeve;

the first blocking position is formed into a rectangle or an arc.

Compared with the prior art, the invention has the beneficial effects that:

the utility model provides a valve clamping device uses first clamping piece and second clamping piece as the main part, regard as the basal portion with supporting component, the second clamping piece can be relative first clamping piece and supporting component at certain angle within range internal rotation, can realize closing and opening of valve clamping device, consequently, the valve clamping device's of this application simple structure, processing and assembly are more convenient, and it is simpler to regard as the auto-lock structure part operation of main part with the elastic component, reliability and security are higher, make to use the valve clamping device of this application to have a higher success rate when performing the operation, reliability and security are higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic view of a first valve clamping device according to an embodiment of the present invention in a deployed configuration;

FIG. 2 is a schematic view of a first valve clamping device according to an embodiment of the present invention in a closed configuration;

FIG. 3 is an exploded view of a first valve clamping device according to an embodiment of the present invention;

FIG. 4 is a schematic view of a first clamp of the valve clamping device according to an embodiment of the present invention;

FIG. 5 is a schematic view of one of the clamping arms of the second clamp of the valve clamping device according to the present invention;

FIG. 6 is a schematic structural view of a support member of a support assembly of the valve clamping device according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a connector of a support assembly of the valve clamping device according to an embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating an exploded view of a release assembly of a valve clamping device according to an embodiment of the present invention;

FIG. 9 is a schematic view of the overall structure of a release assembly of the valve clamping device according to the present invention;

FIG. 10 is a schematic view of a second valve clamping device according to an embodiment of the present invention in a deployed configuration;

FIG. 11 is a schematic view of a second valve clamping device according to an embodiment of the present invention in a closed configuration;

FIG. 12 is a schematic structural view of an elastic member of a support assembly of a second valve clamping device according to an embodiment of the present invention;

fig. 13 is a schematic structural view of a valve clamping device coated with a woven layer according to an embodiment of the present invention.

Reference numerals:

1-a first clamping piece, 11-a clamping piece, 111-a positioning hole, 112-a positioning turnover part, 12-a positioning part, 121-an extension part, 2-a second clamping piece, 21-a clamping arm, 211-a connecting arm, 2111-a positioning groove, 212-a clamping arm main body, 3-a connecting piece, 31-a first connecting part, 32-a second connecting part, 4-a supporting piece, 41-a connecting position, 42-a bending end, 5-an elastic piece, 51-a spiral spring, 52-a torsion spring, 6-a mandrel, 7-a releasing component, 71-a first sleeve, 711-a first clamping position, 72-a second sleeve, 721-a second clamping position, 81-a bolt, 82-a clamping sleeve and 9-a woven fabric layer.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.

Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly over" or "directly overlying" another element, there may be no intervening elements present.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section referred to in the examples described herein may be termed a second element, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

A valve clasping device according to some embodiments of the present application is described below with reference to fig. 1-13.

Embodiments of the present application provide a valve clamping device for capturing leaflets during mitral valve rim-to-rim repair procedures to reduce mitral regurgitation.

Referring to fig. 1-3 and 10 and 11, in an embodiment of the present application, a valve clamping device comprises a first clamp 1, a second clamp 2, a support component, and a mandrel 6 and a release component 7.

Referring to fig. 4 in conjunction with fig. 1 to 3, the first clamping member 1 includes a positioning portion 12, two clamping pieces 11 connected to two sides of the positioning portion 12 and disposed opposite to each other, and a control wire (not shown). The positioning part 12 is connected between the first ends of the two clamping pieces 11, the second ends of the clamping pieces 11 are free ends, and the free ends of the two clamping pieces 11 have a tendency to be away from each other in a natural state (i.e. under the condition that no external force acts on the clamping pieces 11), i.e. the two clamping pieces 11 can be relatively unfolded to match the second clamping part 2 to capture the valve leaflets. The second end of the clamping piece 11 is provided with a positioning hole 111, the control line can movably pass through the positioning hole 111, and the clamping piece 11 is pulled through the control line, so that the opening and closing angle of the clamping piece 11 is controlled. All seted up locating hole 111 on two clamping pieces 11 that set up each other, consequently can control two clamping pieces 11 respectively through the control line, realize the expansion or the closure of first clamping part 1. Fig. 1 to 3 show the first clamping part 1 in a closed state, and fig. 4 shows the first clamping part 1 in an unfolded state.

In addition, referring to fig. 4, the sides of the clip 11 facing away from each other are further formed with positioning turned-over portions 112 turned outward, the positioning turned-over portions 112 may be formed as a convex structure, a triangular or other-shaped turned-over structure, and the like, and fig. 4 shows that the positioning turned-over portions 112 are in an outward-turned triangular structure. When the first clamping component 1 is unfolded, the clamping piece 11 is contacted with one side of the valve leaf of the mitral valve and is matched with the second clamping component 2 (the specific structure of the second clamping component 2 will be specifically described in the following embodiment) to realize clamping at the mitral valve, and when clamping, the positioning turnover part 112 on the clamping piece 11 can increase the friction force of the first clamping component 1 at the clamping position, thereby improving the clamping stability of the valve clamping device of the embodiment.

The material of the clip 11 can be nickel-titanium alloy material and 316 stainless steel, and the clip 11 is preferably nickel-titanium alloy material because of its excellent physical and chemical properties, and the nickel-titanium alloy material has good elasticity, bending resistance, corrosion resistance and stability, and is non-toxic, so the clip 11 formed by the nickel-titanium alloy material has a certain resilience, and the first clamping member 1 can be automatically unfolded in a natural state. In addition, the positioning portion 12 and the clip 11 of the first clamping member 1 of the present embodiment may be an integrally formed structure, that is, the positioning portion 12 and the clip 11 are an integral structure formed by a nickel-titanium alloy material.

Further, as shown in fig. 4, both sides of the positioning portion 12 (the side portions to which the clip 11 is not attached) are formed with extending portions 121 extending outward, and the extending portions 121 are used for connection with the second clip element 2.

Referring to fig. 5 in conjunction with fig. 1 to 3, the second clamping member 2 includes two clamping arms 21 disposed opposite to each other, and the clamping arms 21 and the clamping pieces 11 are disposed in a one-to-one correspondence, so that each clamping piece 11 can cooperate with the corresponding clamping arm 21 to form a clamping action. The clamping arm 21 is plate-shaped, and a vertical edge structure is formed at an edge of one side of the clamping arm facing the clamping piece 11, and the vertical edge structure is matched with the clamping piece 11 to play a more stable clamping role. One end of each clamping arm 21 forms two connecting arms 211 arranged in parallel, and the two connecting arms 211 are respectively used for connecting the extending parts 121 on two sides of the positioning part 12 and the supporting component. As shown in fig. 2 and 3, one end of the connecting arm 211, which is far away from the clamping arm main body 212, is rotatably connected to the extending portion 121 of the positioning portion 12 through a pivot member such as a bolt 81, and a position where the connecting arm 211 is connected to the clamping arm main body 212 is rotatably connected to the supporting assembly through a pivot member such as a bolt 81, so that in a process that the supporting assembly moves relative to the first clamping member 1, the clamping arm 21 can be driven to rotate, thereby opening and closing the second clamping member 2.

Referring to fig. 5, the connecting arm 211 is provided with a positioning slot 2111 extending along the end of the connecting arm 211 towards the clamping arm body 212, and the connecting arm 211 can be connected with the positioning portion 12 at different positions of the positioning slot 2111 through a pivot member such as a bolt 81, so as to adjust the expansion length and the expansion angle of the clamping arm 21. As shown in fig. 1, the connecting arm 211 is connected to the positioning portion 12 at the end of the positioning slot 2111, and at this time, the extension length of the clamping arm 21 is longest and the extension angle is largest, so that the clamping jaw 11 can be engaged to capture the valve leaflet.

Referring to fig. 1 to 3, the support assembly includes a connection member 3, two support members 4, and an elastic member 5.

Referring specifically to fig. 7 in conjunction with fig. 1 to 3, the connecting member 3 has a T-shaped structure, and includes a first connecting portion 31 and a second connecting portion 32 that are vertically connected; one end of the first connecting portion 31 movably passes through the positioning portion 12 and extends into between the two clamping pieces 11, and the end of the first connecting portion 31 is a first end of the connecting member 3. The other end of the first connecting portion 31 is connected to the second connecting portion 32, and the second connecting portion 32 is integrally formed as a second end of the connecting member 3. The second connecting portion 32 has two connecting ends respectively provided at both sides of the first connecting portion 31, and the two connecting ends are respectively used for connecting the two supporting members 4. Specifically, the connection end of the second connection portion 32 may be connected to the support 4 by a connection member such as a bolt 81.

Referring to fig. 6 in detail and with reference to fig. 1 to 3, the supporting member 4 is a V-shaped plate structure, two ends of which are respectively formed as connecting positions 41, and the connecting positions 41 are used for connecting with the second clamping member 2 (the connecting between the two can be realized by a pivot member such as a bolt 81); the bending part of the supporting member 4 is formed as a bending end 42, the bending end 42 is used for connecting with the connecting end of the connecting member 3 (the connection between the two can be realized by connecting members such as a bolt 81), and the connecting positions 41 of the supporting member 4 are relatively symmetrically arranged at two sides of the bending end 42. Support piece 4's quantity is two, two support piece 4 symmetries set up in the both sides of connecting piece 3, to every support piece 4, a connection position 41 thereof is used for connecting a arm 21 of second clamping piece 2, another connection position 41 thereof is used for connecting another arm lock 21 of second clamping piece 2, consequently, through the support linkage effect of two support piece 4 to the arm lock 21 of both sides, on the one hand can guarantee with two arm lock 21 stable connection, on the other hand can make two arm lock 21 realize the symmetry change at the in-process that opens and shuts, guarantee promptly that the angle of opening and shutting of two arm lock 21 changes unanimously.

It should be noted that, as shown in fig. 1 to fig. 3, the structure in which the clip arm 21 and the clip 11, the clip arm 21 and the support 4, and the support 4 and the connecting piece 3 are connected by the bolt 81 is shown, and in order to prevent the bolt 81 from falling off, the cutting ferrule 82 is disposed at the joint of the bolt 81, and the bolt 81 is fixed by the cutting ferrule 82, so as to realize stable connection at the joint of the above structures.

In addition, the material of the clamping arms 21 can be nickel-titanium alloy material and 316 stainless steel, and the nickel-titanium alloy material is preferred.

The elastic part 5 acts as a self-locking member of the valve clamping device, which enables locking of the valve clamping device when the valve clamping device is closed. The present embodiment shows two structural forms of the elastic member 5, and the following describes the structure of the elastic member 5 and the self-locking principle in detail with reference to fig. 1 to 3 and fig. 10 to 12.

As shown in fig. 1 to 3, the elastic member 5 of one embodiment of the valve clamping device of the present application is a coil spring 51, which is sleeved on the first connecting portion 31 of the connecting member 3, and one end of the elastic member 5 is fixedly connected to the positioning portion 12 or the end of the first connecting portion 31 away from the second connecting portion 32, and the other end of the elastic member 5 is fixedly connected to the end of the first connecting portion 31 for connecting the second connecting portion 32 or the second connecting portion 32. Taking the view angle of the valve combining device shown in fig. 1 as an example, in the working process of the valve combining device, one end of the connecting piece 3 extending into the clamping pieces 11 is pushed to move downwards, the distance between the positioning portion 12 and the second connecting portion 32 of the connecting piece 3 is increased, the coil spring 51 is elastically stretched, the clamping arms 21 move in the direction away from the corresponding clamping pieces 11 under the pulling action of the connecting piece 3 and the supporting piece 4, that is, the clamping arms 21 are unfolded relative to the clamping pieces 11, and at this time, the valve combining device is in the unfolded state. The connecting piece 3 is released (i.e. the acting force acting on the connecting piece 3 is cancelled), the spiral spring 51 can elastically retract and generate an elastic restoring force at the same time, the restoring force can pull the positioning part 12 and the second connecting part 32 of the connecting piece 3 to be close to each other, the clamping arm 21 moves towards the corresponding clamping piece 11 under the pulling action of the connecting piece 3 and the supporting piece 4, namely, the clamping arm 21 is closed relative to the clamping piece 11 until the valve clamping device is in a stable closed state, namely, the locking of the valve clamping device can be realized by matching the connecting piece 3 and the supporting piece 4 through the spiral spring 51, the structure is simple, the assembly and the operation are convenient, and the reliability and the safety are.

When the elastic member 5 is the coil spring 51, the end of the elastic member 5 can be fixedly connected to the positioning portion 12 and the connecting member 3 by welding, bonding with medical glue, or clipping, so long as the elastic member 5 can be stably connected to the positioning portion 12 and the connecting member 3.

As shown in fig. 10 to 12, the elastic element 5 of another embodiment of the valve clamping device of the present application is a torsion spring 52, which is sleeved on the second connecting portion 32 of the connecting element 3, and two abutting ends of the torsion spring 52 abut against the side walls of the clamping arms 21 at two sides of the connecting element 3, which are away from the clamping pieces 11. Taking the view angle of the valve combining device shown in fig. 10 as an example, in the working process of the valve combining device, the end of the connecting piece 3 extending into the clamping pieces 11 is pushed to move downward, the distance between the positioning portion 12 and the second connecting portion 32 of the connecting piece 3 is increased, the clamping arms 21 move in the direction away from the corresponding clamping pieces 11 under the pulling action of the connecting piece 3 and the supporting piece 4, that is, the clamping arms 21 are unfolded relative to the clamping pieces 11, the unfolding of the clamping arms 21 can push the torsion spring 52 to generate torsion deformation, and at this time, the valve combining device is in the unfolding state. Release connecting piece 3 (promptly withdraw the effort of acting on connecting piece 3), torsion spring 52 can take place torsion gyration and produce the torsion restoring force simultaneously, this restoring force can promote the relative clamping piece 11 of arm lock 21 closed, the closure of arm lock 21 passes through support piece 4 and drives second connecting portion 32 of location portion 12 and connecting piece 3 and be close to each other for valve clamping device reaches stable closed state, can realize the locking to valve clamping device through torsion spring 52 cooperation connecting piece 3 and support piece 4 promptly, moreover, the steam generator is simple in structure, the assembly and the operation are convenient, and reliability and security are high.

Optionally, as shown in fig. 10 and 11, the number of the torsion springs 52 is two, the two torsion springs 52 are respectively sleeved on the second connecting portions 32 located at two sides of the first connecting portion 31 of the connecting member 3, and the two torsion springs 52 act synchronously, so that the unfolding and closing processes of the clamping arms 21 are more stable, the closing state of the valve closing device is more stable, and the reliability and the safety of the device are further improved.

Referring to fig. 1 to 3, the pushing action of the valve closing device of this embodiment on the connecting member 3 during operation is achieved by an operator operating the mandrel 6, wherein the mandrel 6 is an elongated rod member, and one end of the elongated rod member is detachably connected, such as by screwing or clipping, with the end of the connecting member 3 extending between the clamping pieces 11 (the first end of the connecting member 3). As shown in fig. 3, an external threaded connection part is formed at one end of the mandrel 6, an internal threaded connection hole is formed at the first end of the connecting member 3, and the mandrel 6 is in threaded connection with the first end of the connecting member 3, so that when the connecting member 3 needs to be pushed, the control of the connecting member 3 can be realized by operating the mandrel 6. It can be understood that, in this embodiment, an internal threaded connection hole may be formed at one end of the mandrel 6, and an external threaded connection part may be formed at the first end of the connection member 3, so as to achieve the threaded connection between the mandrel 6 and the connection member 3.

Referring to fig. 8 and 9 in conjunction with fig. 1 to 3, the release assembly 7 is disposed between the jaws 11, and the release assembly 7 includes a first sleeve 71 and a second sleeve 72 that are engaged with each other; the first sleeve 71 is sleeved outside the first end of the connecting piece 3, and the first sleeve 71 is fixedly connected with the positioning part 12; the second sleeve 72 is connected to a side of the first sleeve 71 facing away from the positioning portion 12. The mandrel 6 can be connected to the first end of the connector 3 through a first sleeve 71 and a second sleeve 72. The first sleeve 71 is formed with a first detent 711 extending along a radial direction thereof, the first detent 711 is formed as a detent structure, a protrusion structure, or a detent structure having both the detent structure and the protrusion structure, and an opening shape of the detent structure and a protrusion shape of the protrusion structure may be rectangular or arc-shaped. The second sleeve 72 is formed with a second detent 721 extending along the radial direction thereof, and the second detent 721 is adapted to the first detent 711, so that the first sleeve 71 and the second sleeve 72 can be clamped by the matching clamping action of the second detent 721 and the first detent 711. As shown in fig. 8 and 9, the first detent 711 is shown to include a radially extending rectangular slot structure and a rectangular protrusion structure, and the second detent 721 is correspondingly provided with a radially extending rectangular protrusion and a rectangular slot structure, so as to achieve the engagement of the first sleeve 71 and the second sleeve 72.

In addition, 316 stainless steel can be selected for the material of connecting piece 3, support piece 4, bolt 81, cutting ferrule 82 and dabber 6 and release subassembly 7, and 316 stainless steel has good tensile properties, and yield strength is higher, corrosion resistance and stability are fabulous, and the material easily obtains, can satisfy the user demand.

In addition, the embodiment of the application can also coat the outer side of the first clamping piece 1, the second clamping piece 2 and the supporting component with the braided fabric layer 9. Specifically, as shown in fig. 13, the braided fabric layer 9 can be wrapped around the clip 11, the clip arm 21 and the supporting component, the braided fabric layer 9 is formed by a PET polymer compound, on one hand, the contact area between the first clip member 1 and the second clip member 2 and the valve leaflet can be increased after the braided fabric layer is wrapped around the PET polymer compound, so as to reduce the damage of the clip member to the valve leaflet, and on the other hand, the braided fabric layer 9 is formed with a porous structure, so as to promote endothelialization, and convert the human non-endothelial cells to endothelial cells on the surface of the clip member, thereby playing a role of anticoagulation. It should be noted that the braid 9 does not affect the clamping action of the valve clamping device of the present embodiment.

The working principle and the application operation process of the valve clamping device of the present embodiment will be specifically described below with reference to fig. 1 and 2 and fig. 10 and 11, wherein fig. 2 and 11 show the structural schematic diagram of the valve clamping device in the closed state, and fig. 1 and 10 show the structural schematic diagram of the valve clamping device in the open state.

The valve clamping device of the embodiment takes the first clamping part 1 and the second clamping part 2 as main bodies, takes the connecting piece 3 as a base part, and the second clamping part 2 can rotate in a certain angle range relative to the first clamping part 1 and the connecting piece 3 to realize the closing and the opening of the clamping device. During the application operation, the upper ends of the clamping pieces 11 of the first clamping part 1 are firstly pulled by using the control lines, so that the two clamping pieces 11 are close to each other and close to the releasing component 7; then the control line is released, the clamping pieces 11 move towards the direction of separation due to the metal resilience force, so that the two clamping pieces 11 are correspondingly attached to the two clamping arms 21 respectively, and the effect of capturing the valve leaflets is achieved.

Furthermore, the opening angle for the two clip arms 21 can be achieved by the mandrel 6 engaging the connecting piece 3. Firstly, on the premise that the mandrel 6 is connected with the connecting piece 3, the movement of the connecting piece 3 is controlled by controlling the movement of the mandrel 6. In the view shown in fig. 1 and 2, the driving mandrel 6 moves downward, the connecting piece 3 and the supporting piece 4 move downward, the two clamping arms 21 are pulled to be relatively unfolded to a preset angle, and the elastic piece 5 stores force. Then, the mandrel 6 is rotated to separate the mandrel 6 from the connecting piece 3, at this time, the radial limitation of the mandrel 6 is not provided, the second sleeve 72 can be separated from the first sleeve 71, the first end of the connecting piece 3 can move between the clamping pieces 11, the clamping arm 21 is driven to move towards the direction close to the clamping pieces 11 under the restoring force action of the elastic piece 5, so that the clamping arm 21 is locked, the stability of clamping the valve leaflet by the clamping arm 21 and the corresponding clamping piece 11 is improved, and the valve clamping device is prevented from falling off at the clamping position.

Therefore, the valve clamping device of the embodiment has the advantages of simple structure, convenience in processing and assembling, simplicity and convenience in operation, simplicity in operation of the self-locking structure part taking the spring as the main body, high reliability and safety, high success rate when the valve clamping device of the embodiment is used for operation, and high reliability and safety.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve clamping device, comprising:

2. The valve clamping device of claim 1, wherein said first clamp comprises two of said jaws, said second clamp comprises two of said clamping arms, and said two of said jaws and said two of said clamping arms are disposed on opposite sides of said connector, respectively;

3. The valve clamping device according to claim 2, wherein the supporting member is V-shaped, two ends of the supporting member respectively form a connecting position, the supporting member is rotatably connected with the two clamping arms through the connecting positions, and a bent end of the supporting member is connected with the second end of the connecting member;

4. The valve clamping device according to claim 1, wherein a positioning groove is formed at a connection part of the clamping arm for connecting with the positioning part, and the clamping arm can be connected with the positioning part at different positions of the positioning groove through a positioning part so as to change the expansion length of the clamping arm.

5. The valve clamping device of claim 2, wherein the resilient member is a coil spring;

6. The valve clamping device of claim 2, wherein the resilient member is a torsion spring;

7. The valve clipping device of claim 1, wherein the first clip element further comprises a control wire, wherein an end of the clip distal from the positioning portion is formed with a positioning aperture through which the control wire can move;

8. The valve clamping device of claim 1, further comprising a mandrel removably coupled to the first end of the connector.

9. The valve coaptation device of claim 8, wherein the valve coaptation device further comprises a release assembly;

10. The valve clamping device of claim 9, wherein the first sleeve is formed with a first detent extending radially, and the second sleeve is formed with a second detent engageable with the first detent;

the first blocking position is formed into a rectangle or an arc.