A high-strength and flexible covered vascular stent

Abstract

The invention relates to a high intensity soft and smooth type tectorial membrane vascular stent. The vascular stent comprises a cannular tectorial membrane and metal stents which are located in the tectorial membrane; the metal stents comprise a plurality of stent rings, and small drop-shaped rings which bends crosswise are distributed on the circumferences of the stent rings; the extension directions of the small rings are parallel to the axial directions of the corresponding stent rings, and the extension directions of the adjacent small rings are opposite. The tectorial membrane vascular stent has good flexibility and can adopt to a relatively twisted blood vessel structure; meanwhile the vascular stent has higher radial direction support force, and the vascular stent can adopt to the blood vessel with a bad form such as straitness and prevent the complications such as inner leakage. According to the vascular stent, the small drop-shaped rings are designed to an angulation which protrudes in the axial direction, and when the tectorial membrane vascular stent is used combinedly, the metal stents of the tectorial membrane vascular stents of the inner layer and the outer layer can hook with each other and can be prevented from falling off.

Description

Technical field [0001] The invention belongs to the technical field of medical devices, and particularly relates to a high-strength and flexible type covered blood vessel stent. Background technique [0002] Aortic disease is a group of cardiovascular diseases that seriously threaten human health, mainly including aortic dissection and aortic aneurysm. If these diseases are not treated in time, they may cause aortic vascular rupture, which seriously threatens the life of patients. [0003] At present, stent implantation is one of the main methods for the treatment of cardiovascular diseases, and the stent graft is widely used clinically. At present, the structural design of the stent graft on the market has some drawbacks, such as poor flexibility, irregular expansion shape, and weak connection between components. These poor design factors can lead to poor deployment of the stent graft in the blood vessel. . Poor flexibility or irregular expansion of the inner diameter can lead ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-strength and flexible covered vascular stent, which is used for the treatment of aortic dissection and aortic aneurysm, and can solve the problem of poor flexibility, irregular expansion shape and component gaps of the existing covered vascular stent. Insecure connections etc.

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