CN216777298U

CN216777298U - Clamping assembly for mitral valve repair clamp

Info

Publication number: CN216777298U
Application number: CN202122452017.9U
Authority: CN
Inventors: 吴明明; 耿肖肖; 丁峰; 石成晓; 陈大凯
Original assignee: Koka Nantong Lifesciences Co Ltd
Current assignee: Koka Nantong Lifesciences Co Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-06-21
Anticipated expiration: 2031-10-12

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a clamping assembly. A clamping assembly for a mitral valve repair clamp, comprising: the first clamping arm and the second clamping arm; the first clamping arm and the second clamping arm are arranged oppositely; the outer side surface of the first clamping arm is provided with: a plurality of first friction members arranged in a row from a distal end to a proximal end; the second clamping arm has on its inner side: a plurality of second friction members arranged in a row from the distal end to the proximal end. According to the mitral valve repair clamp, the first friction piece is arranged on the first clamping arm, the second friction piece is arranged on the second clamping arm, and the valve leaflets are clamped through the mutual matching of the first friction piece and the second friction piece, so that the valve is prevented from falling off due to heart contraction in the later use process of the mitral valve repair clamp.

Description

Clamping assembly for mitral valve repair clamp

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a clamping assembly.

Background

For cardiac valve insufficiency, in particular atrioventricular valve insufficiency or regurgitation, the current treatment methods mainly comprise valvuloplasty, artificial mechanical valve replacement and biological valve replacement. With the development of cardiac surgical techniques, annuloplasty has become one of the major means of treating heart valve disease. Compared with the replacement of artificial mechanical valves, the valvuloplasty does not need anticoagulation, avoids complications caused by taking anticoagulant drugs such as warfarin and the like, and has good forming effect and is beneficial to the recovery of cardiac function. Although the anticoagulation time is short after the replacement of the biological valve, the short service life is a main obstacle limiting the wide application of the biological valve.

In the process of performing the valvuloplasty, a repair fixture is needed, and a first clamping arm and a second clamping arm are usually adopted to clamp the valve leaflet in a matching way. It is generally recognized in the industry that the first clamping arm functions to capture a leaflet and to bring the captured leaflet into clamping engagement with the second clamping arm. Thus, the first clamping arm is typically barbed and the barb is designed very sharp and thin in order to penetrate the leaflets. However, multiple clinical trials find that the second clamping arm is generally placed near the valve leaflet, so that the valve leaflet is lifted, the first clamping arm is continuously pushed towards the far end, and when the valve leaflet is located at the proper position of the second clamping arm, the first clamping arm is pulled back to be matched with the second clamping arm, so that the barb on the first clamping arm only plays a friction role, so that the valve is prevented from falling off due to heart contraction in the later use process of the repair clamp.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the existing mitral valve repair clamp cannot be adapted to practical use scenes, and provides a clamping assembly for the mitral valve repair clamp.

A clamping assembly for a mitral valve repair clamp, comprising: the first clamping arm and the second clamping arm are matched with the first clamping arm to clamp the native valve leaflets;

the clamping device is characterized in that the first clamping arm and the second clamping arm are oppositely arranged;

the first clamping arm has on its outer side:

a plurality of first friction members arranged in a row from a distal end to a proximal end;

the second clamping arm has on its inner side:

a plurality of second friction members arranged in a row from the distal end to the proximal end.

According to the utility model, the first friction piece is arranged on the first clamping arm, and the second friction piece is arranged on the second clamping arm, so that in the actual use process, the second clamping arm is placed near the valve leaflet through an external conveying structure, the second clamping arm plays a role of lifting the valve leaflet, the first clamping arm is continuously pushed towards the far end, when the valve leaflet is located at the proper position of the second clamping arm, the first clamping arm and the second clamping arm are pulled back, and the valve leaflet is clamped by the first friction piece and the second friction piece in a mutually matched mode, so that the valve is prevented from falling off due to heart contraction in the later use process of the mitral valve repair clamp.

The first friction piece and the second friction piece are both of saw-tooth structures, and the saw-tooth structures of the first friction piece and the second friction piece can be meshed with each other to clamp the valve leaflets in a matched mode.

First friction spare adopts the triangular prism structure, a quadrangle bottom surface in the first friction spare set up in on the first clamping arm, two sides of first friction spare are the triangle-shaped structure, in the triangle-shaped structure with in two contained angles of first clamping arm junction, the contained angle that is located the near-end is first contained angle, and the contained angle that is located the distal end is the second contained angle, the angle of first contained angle is greater than the angle of second contained angle, another contained angle orientation of first clamping arm is kept away from in the triangle-shaped structure the second clamping arm.

The angle range of the first included angle is 80-110 degrees.

The angle of the other included angle ranges from 45 degrees to 75 degrees.

The bottom space between two adjacent first friction pieces is as follows: the height of the first friction member is 1: 0.5-1.5.

The heights of the first friction pieces are gradually reduced from the far end of the first clamping arm along the proximal direction.

The second friction piece adopts the triangular prism structure, a quadrangle bottom surface in the second friction piece set up in on the second clamping arm, two sides of second friction piece are isosceles triangle, the apex angle orientation of second friction piece first clamping arm.

The far end of the first clamping arm and the far end of the second clamping arm are both coated with clamping arm coating films.

The clamping arm covering film is made of high polymer materials or natural pericardium materials.

The high polymer material is at least one of expanded polytetrafluoroethylene, polyester, polyurethane, polypropylene or silicon rubber.

The positive progress effects of the utility model are as follows: the utility model adopts the clamping component for the mitral valve repair clamp, the first friction piece is arranged on the first clamping arm, the second friction piece is arranged on the second clamping arm, and the valve leaflets are clamped through the mutual matching of the first friction piece and the second friction piece, so that the valve is prevented from falling off due to heart contraction in the later use process of the mitral valve repair clamp.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1;

FIG. 4 is a schematic view of a first clamping arm according to the present invention;

fig. 5 is a schematic structural view of the second clamping arm according to the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific drawings.

Referring to fig. 1 to 5, a clamping assembly for a mitral valve repair clamp includes a first clamping arm 111, a second clamping arm 121 cooperating with the first clamping arm 111 to clamp native valve leaflets, and the first clamping arm 111 and the second clamping arm 121 are disposed opposite to each other. As shown in fig. 1, when the present invention is applied to a mitral valve repair clamp, two first clamping arms 111 and two second clamping arms 121 may be provided, and one first clamping arm 111 is engaged with and opposed to one second clamping arm 121.

The outer side surface of the first clamping arm 111 is provided with a plurality of first friction members 112, and the plurality of first friction members 112 are arranged in a row from the far end to the near end. The second clamping arm 121 has a plurality of second friction members 122 on its inner side, and the plurality of second friction members 122 are arranged in a row from the distal end to the proximal end. As shown in fig. 1, the plurality of second friction members 122 on the second clamping arm 121 are disposed opposite the plurality of first friction members 112 on the first clamping arm 111. As shown in fig. 2, the width of the second clamping arm 121 is greater than the width of the first clamping arm 111, and preferably, the width of the second clamping arm 121 is twice the width of the first clamping arm 111.

According to the utility model, the first friction piece 112 is arranged on the first clamping arm 111, and the second friction piece 122 is arranged on the second clamping arm 121, so that in the actual use process, the second clamping arm 121 is placed near the valve leaflet through an external conveying structure, the second clamping arm 121 plays a role of lifting the valve leaflet, the first clamping arm 111 is continuously pushed towards the far end, when the valve leaflet is located at the proper position of the second clamping arm 121, the first clamping arm 111 and the second clamping arm 121 are pulled back, the valve leaflet is clamped by the mutual matching of the first friction piece 112 and the second friction piece 122, and the valve is prevented from falling off due to heart contraction in the later use process of the mitral valve repair clamp.

The first friction member 112 and the second friction member 122 both adopt a saw-tooth structure, and the saw-tooth structure of the first friction member 112 and the saw-tooth structure of the second friction member 122 are engaged with each other to clamp the valve leaflets.

Referring to fig. 3, the first friction member 112 is a triangular prism structure, a quadrilateral bottom surface of the first friction member 112 is disposed on the first clamping arm 111, two side surfaces of the first friction member 112 are triangular structures, an included angle located at a proximal end of two included angles at a connection with the first clamping arm 111 in the triangular structure is a first included angle a, an included angle located at a distal end of the two included angles is a second included angle b, the angle of the first included angle a is greater than that of the second included angle b, and another included angle c away from the first clamping arm 111 in the triangular structure faces the second clamping arm 121. The first included angle a is in the range of 80-110. The other included angle c is in the range of 45-75. Bottom pitch L of two adjacent first friction members 112: the height H of the first friction member 112 is 1: 0.5-1.5. The height H is the distance between another included angle c in the triangular structure and the first clamping arm 111. Preferably, the height H of the plurality of first friction members 112 is gradually decreased from the distal end of the first clamping arm 111 in the proximal direction.

Referring to fig. 3, the second friction member 122 has a triangular prism structure, a quadrilateral bottom surface of the second friction member 122 is disposed on the second clamping arm 121, two side surfaces of the second friction member 122 are isosceles triangles, and a vertex angle of the second friction member 122 faces the first clamping arm 111.

The distal ends of the first clamping arm 111 and the second clamping arm 121 are coated with clamping arm coating films 130. The clamping arm covering film 130 is made of a high polymer material or a natural pericardium material. The high polymer material is at least one of expanded polytetrafluoroethylene, polyester, polyurethane, polypropylene or silicon rubber.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A clamping assembly for a mitral valve repair clamp, comprising: the first clamping arm and the second clamping arm are matched with the first clamping arm to clamp the native valve leaflets;

the first clamping arm has on its outer side:

the second clamping arm has on its inner side:

a plurality of second friction members arranged in a row from the distal end to the proximal end;

2. The clamping assembly for a mitral valve repair clamp of claim 1, wherein the first friction member and the second friction member each have a saw-tooth structure, and the saw-tooth structure of the first friction member and the saw-tooth structure of the second friction member are engageable with each other.

3. The mitral valve repair clamp assembly of claim 1, wherein the first included angle is in a range of 80 ° to 110 °.

4. The clamping assembly for a mitral valve repair clamp of claim 1, wherein the further included angle is in the range of 45 ° -75 °.

5. The mitral valve repair clamp assembly of claim 1, wherein the bottom spacing of two adjacent first friction members is: the height of the first friction member is 1: 0.5-1.5.

6. The clip assembly for a mitral valve repair clip of claim 1, wherein the plurality of first friction members gradually decrease in height in a proximal direction from the distal end of the first clip arm.

7. The clamping assembly for a mitral valve repair clamp of claim 1, wherein the second friction member has a triangular prism structure, a quadrangular bottom surface of the second friction member is disposed on the second clamping arm, two side surfaces of the second friction member are isosceles triangles, and a vertex of the second friction member faces the first clamping arm.

8. The clamping assembly for a mitral valve repair clamp of claim 1, wherein the distal end of the first clamping arm and the distal end of the second clamping arm are coated with clamping arm coating films.

9. The clamping assembly for a mitral valve repair clamp of claim 8, wherein the clamping arm cover is made of a polymer material or a natural pericardial material.