Covered stent and manufacturing method thereof

Abstract

The invention provides a covered stent and a manufacturing method thereof. Through the design that the near-end portion of a covered tube is not provided with a hole, and the far-end portion of the covered tube is provided with the hole, the covered stent can retain intercostal arteries to the greatest extent and reduce occurrence of complications such as paraplegia while the lesion vessels are repaired, the covered stent with the sufficient length can be selected according to distribution of the diseased portions, and long-term break endoleak caused by shrinkage of the stent and upward movement of the far-end of the stent is avoided. Furthermore, through the design that the near-end wave peak of a first stent ring connected with the near-end of the covered tube is of a circular-arc-shaped structure, hurt of the covered stent to the vessel walls and important branches can be effectively reduced; meanwhile, the wall attaching performance of the stent is improved, and the bird mouth phenomenon is greatly reduced. In addition, through the design that the far-end wave trough of a third stent ring fixed to the far end of the covered tube is of a circular-arc-shaped structure, the covered stent also can integrally present the very good roundness to effectively reduce the hurt of the covered stent to the vessel walls.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a covered stent and a manufacturing method thereof. Background technique [0002] Thoracic aortic aneurysm or dissection is a fatal vascular surgical disease with a high incidence. Before the 1990s, traditional surgical treatment was always used in medicine, which was difficult, traumatic, and complicated. Until 1994, Dake et al. used endovascular stent-graft implantation for Stanford type B aortic dissection for the first time, and then interventional therapy has been greatly developed. In interventional therapy, the stent-graft is usually delivered into the body through the outer sheath through femoral artery puncture, and reaches the aortic lesion along with the aortic channel to cover and repair the lesioned vessel. [0003] Interventional surgery can reduce thoracotomy trauma and mortality, and reduce the time for major arteries to be blocked. However, there are al...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a stent graft and its manufacturing method to solve one or more defects of the existing stent graft

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