Valve stent safe to use and valve replacement device with same

Abstract

The invention discloses a valve stent safe to use and a valve replacement device with the same. The valve stent comprises a tubular supporting net rack and a flaring section connected to the end of the supporting net rack. The flaring section is connected with all end nodes of the corresponding side of the supporting net rack. The flaring section is located at the initial releasing end of the valve stent. The outer edge of the flaring section is formed by a plurality of bent supporting strips. The end nodes, corresponding to the supporting strips in position, of the supporting net rack are connected with the supporting strips. The structure of an existing memory alloy self-expanding valve stent is improved, isolated rhombus peaks existing at the non-end portion of the valve stent are eliminated, the phenomenon that spines appear after the valve stent is compressed is avoided while the original structural mechanical property is kept, and the problem that a sheathing canal is damaged by spines is fundamentally solved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a safe valve support and a valve replacement device with the valve support. Background technique [0002] In the prior art, an interventional heart valve usually includes a compressible valve stent and valve leaflets, wherein the valve stent has good biocompatibility and can be safely, stably and reliably placed on a corresponding heart valve position. [0003] The main part of the valve stent is mostly a diamond-shaped unit structure to meet the compressibility requirements. However, the diamond-shaped unit structure will have independent diamond-shaped vertices. These isolated rhombus-shaped vertices are usually relatively sharp. During the use of the valve stent, These isolated diamond-shaped vertices pose a risk of puncturing the sheath. [0004] If these isolated diamond-shaped vertices are concentrated at the end of the valve stent, the piercing effect will be small. However...

AI Technical Summary

Problems solved by technology

The valve sewing section in this patent document is composed of several diamond-shaped structural units. When the distal end of the valve sewing section is connected to the stop mechanism, there are several isolated diamond-shaped vertices left over. These isolated diamond-shaped vertices become security risks

[0007] As another example, the Chinese patent document whose authorized announcement number is CN 101951858 B discloses a funnel-shaped throttling device, such as figure 1 As shown, the funnel-shaped throttling device includes a middle part with a rhombus grid structure, and flared end parts connected to both ends of the middle part. The rhombus grid structure in the middle part has a number of isolated rhombus vertices 10, which exist in isolation The rhombus vertex 10 will cause great inconvenience to the operation process

[0008] When the valve stent is compressed into the sheath, the isolated diamond-shaped vertices will be deformed into spikes, which will easily puncture the sheath when passing through the complex curved anatomical path of the human body, and will also cause resistance during the subsequent valve release process If it is too large, it will puncture the sheath, causing the valve to fail to release normally. In extreme cases, it will puncture or even pierce the blood vessel wall, causing great harm to the patient.

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