Film coating bracket

Abstract

The invention discloses a film coating bracket which comprises a film coating pipe and a self-ejecting type bracket, wherein the self-ejecting type bracket is fixed on the film coating pipe by a suture line and comprises a plurality of self-expanding rings, and the self-expanding ring positioned at the end part of the film coating pipe has an integral waveform structure with a long edge and a short edge. By the integral design of the long edge and the short edge on the self-expanding ring positioned at the end part of the film coating bracket provided by the embodiment of the invention, the short edge constrains the long edge; and meanwhile, the suture depth of the self-expanding ring at the end part is increased, and the constraining function of the film coating pipe on the self-expanding ring at the end part is strengthened. Accordingly, the film coating bracket can provide enough constrain force for the part of the self-expanding ring at the end part, which is exposed out of the film coating pipe in the release process, thereby greatly reducing a turnover risk of the self-expanding ring at the end part during release.

Description

technical field [0001] The present application relates to the field of medical devices, in particular to a covered stent. Background technique [0002] Aortic aneurysm is a mass on the wall of the aorta, which is caused by pressure on the weak artery wall. It can be divided into three types according to the location: ascending aortic aneurysm, aortic arch aneurysm, and descending aortic aneurysm. When an aneurysm reaches a certain size it is at risk of rupture, which can lead to internal bleeding that can be life-threatening for the patient. The current treatment method is mainly to implant a covered stent to seal the aneurysm from the inside to relieve the impact of blood pressure on the weak aortic wall, thereby reducing the risk of its rupture. [0003] The covered stent includes a covered tube and a self-elastic stent fixed on the covered tube by sutures. At the end of the existing covered stent, there is often a part of the self-elastic stent exposed outside the covere...

AI Technical Summary

Problems solved by technology

[0004] Through the research on the prior art, the applicant found that: since the "bare section" of the self-elastic stent is sewn into the covered tube at a shallow depth, it is less constrained by the covered tube and has greater elasticity, so during the release process In the process, the "bare section" of the self-elastic stent may be folded, which will cause the end of the stent-graft to not fit well on the vessel wall, resulting in type I endoleak. At the same time, the folded self-elastic stent The "bare segment" of the needle may also penetrate into the blood vessel wall and cause serious damage to the blood vessel wall

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