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Mitral valve stent

A mitral valve and internal stent technology, applied in the field of medical devices, can solve problems such as increased development difficulty, achieve smooth blood flow, avoid blood flow obstruction, and increase the area that blood flow can pass through

Pending Publication Date: 2022-01-25
赛诺心畅医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the unique anatomical structure of the mitral valve greatly increases the difficulty of its development. Not only must the outflow tract of the left ventricle and aortic valve be considered, but also whether the blood flow of the pulmonary vein outlet of the left atrium is unobstructed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a mitral valve stent, such as figure 1 As shown, it includes: an inner stent 1, an outer stent 2 and a skirt 3, the inside of the inner stent 1 is connected with an artificial biological valve leaflet 4, and the outer stent 2 is connected and sleeved on the outside of the inner stent 1, The skirt 3 is wrapped and connected to the inner bracket 1 .

[0038] Such as figure 2 As shown, in the existing mitral valve stent products, after the mitral valve stent is set to the position of the mitral valve, the upper end of the inner stent 1 protrudes upwards from the annulus 5 of the mitral valve, and the lower end of the inner stent 1 faces downward. The outer stent 2 protrudes, and the skirt 3 is completely covered on the inner stent 1; like this, the part of the inner stent 1 protruding upward from the annulus 5 will be blocked on the blood channel entering the pulmonary vein outlet 7 of the left atrium 6, thus causing Poor blood circulation can e...

Embodiment 2

[0042] This embodiment provides a mitral valve stent, such as Image 6 As shown, its structure is substantially the same as that of Embodiment 1, and the upper end of the inner stent 1 is upwardly beyond the position of the annulus 5 of the mitral valve. The difference is that the upper edge of the skirt 3 of the present embodiment is a straight edge, but , the upper edge of the skirt 3 upwards does not exceed the position of the mitral annulus 5 .

Embodiment 3

[0044] This embodiment provides a mitral valve stent, such as Figure 7 As shown, its structure is substantially the same as that of Embodiment 1, the difference being that firstly, the upper end of the inner stent 1 does not exceed the position of the valve annulus 5 of the mitral valve upwards, that is, the top end of the inner stent 1 is lowered below the valve annulus 5 , at this time, the blood flow of the left atrium 6 flows into the left ventricle 10 through the inner stent 1 more easily, and the upper side of the skirt 3 can be set as a straight side.

[0045] Second, because the inner stent 1 has been moved down, the part of the inner stent 1 protruding downwards from the outer stent 2 is larger, and the annulus 5 of the mitral valve is adjacent to the aortic valve 11, and the inner stent 1 from The protruding part of the ventricle end of the outer stent 2 is hollowed out to prevent the obstruction of the outflow tract of the left ventricle 10 and ensure the smooth fl...

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Abstract

The invention provides a mitral valve stent, and belongs to the technical field of medical instruments. The mitral valve stent comprises an inner stent internally connected with an artificial biologic valve leaflet, an outer stent, and a skirt edge, wherein the outer stent is connected to and arranged outside the inner stent in a sleeving mode; the skirt edge is connected to the inner stent in a wrapping manner; and the upper end and / or the lower end of the combination of the inner stent and the skirt edge are / is hollowed out. According to the mitral valve stent, when the upper end of the combination of the inner stent and the skirt edge is hollowed out, smooth blood flow of a pulmonary vein outlet of a left atrium can be guaranteed, and when the inner stent is moved downwards to enable the upper end of the inner stent not to exceed a valve ring, the part, protruding out of the outer stent, of the lower end of the combination of the inner stent and the skirt edge will block a left ventricular outflow tract; and the lower end,combined with the skirt edge, of the inner stent is designed to be hollow, so that smoothness of the left ventricular outflow tract can be guaranteed, blood flow blocking can be avoided in consideration of smoothness of the left ventricular outflow tract and smoothness of blood flow of a pulmonary vein outlet of a left atrium, and the mitral valve stent is more suitable for transcatheter mitral valve replacement.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a mitral valve stent. Background technique [0002] Mitral valve regurgitation is one of the most common heart valve diseases. Systolic blood flow reverses from the left ventricle to the left atrium. About 10% of people over the age of 75 suffer from this disease. [0003] Mitral valve repair or replacement under extracorporeal circulation is the standard treatment for mitral regurgitation. However, some studies have shown that more than 50% of patients with severe symptomatic mitral regurgitation are due to pulmonary insufficiency, liver insufficiency, and renal insufficiency. And other reasons are not suitable for surgical treatment. [0004] According to the accumulated clinical experience of transcatheter aortic valve replacement, completely percutaneous, transfemoral, transapical and other approaches are also suitable for mitral valve replacement, and the transcat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/24
CPCA61F2/2418A61F2/2442A61F2/2412
Inventor 赵金红马剑翔于博宇孟磊李天竹李中华
Owner 赛诺心畅医疗科技有限公司