Double top-cover coronary bracket

Abstract

The invention relates to a double-top ring coronary artery frame, a pipe wall ring frame is formed by metal main body units which are connected with each other, the metal main body unit is formed by a large snake-shaped ring segment, a double-top snake-shaped ring segment and a small snake-shaped ring segment which are connected with each other in turn, the neighboring large snake-shaped ring segment and the small snake-shaped ring segment of the metal main body units are connected with each other by single top rings, the front metal main body unit is connected with the rear metal main body unit through the double-top snake-shaped ring segment by using a connecting rod and the single top ring formed by the large snake-shaped ring segment and the small snake-shaped ring segment. The metal main body unit of the double-top ring coronary artery frame is composed of the large snake-shaped ring segment, the double-top snake-shaped ring segment and the small snake-shaped ring segment at interval, the connecting rod adopts structure characteristic mode of a straight rod or a n-shaped connecting rod, the flexibility of the frame can be effectively increased, the frame has small retracting performance in order that after the frame is expanded at last, the diameter of the frame can be accurately suitable for the blood vessel diameter on pathological change, the coronary artery frame of the invention has high scientificaalness.

Description

technical field [0001] The invention relates to a coronary stent in the field of medical materials, in particular to a double top ring coronary stent. Background technique [0002] Coronary artery stenting is a new type of minimally invasive interventional therapy, which has developed rapidly since it was applied in clinic and is more and more widely used. At present, there are many kinds of stents clinically. Although the emphases are different, the purpose is to improve the supporting force, flexibility and expandability of the stent. However, the design of existing stents often cannot meet the above indicators at the same time, and there are generally the following defects: 1. For stents with relatively large metal coverage, although the radial support force is improved, the flexibility and transport performance of the stent are relatively small , which is not conducive to the treatment of tortuous vasculature; 2. For stents with small metal coverage, although the flexib...

AI Technical Summary

Problems solved by technology

However, the design of existing stents often cannot meet the above indicators at the same time, and there are generally the following defects: 1. For stents with relatively large metal coverage, although the radial support force is improved, the flexibility and transport performance of the stent are relatively small , which is not conducive to the treatment of tortuous vasculature; 2. For stents with small metal coverage, although the flexibility of the stent has been improved, its radial support force will be weakened, and it is impossible to open the blood vessels in the lesion to allow blood to re-open. 3. The elastic retraction characteristics of existing stents are not good, which will affect the final clinical results

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