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Stent Graft

A covered stent and film-covered technology, which is applied in the field of medical devices, can solve problems such as film expansion, covered stent rupture, and loss of isolation function of the covered stent, so as to improve the ability of anti-expansion, ensure blood flow, and reduce function. The effect of the risk of failure

Active Publication Date: 2021-06-29
LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the double-layer PTFE coating has a certain degree of ductility in the circumferential direction, and after being impacted by high-pressure blood flow for a long time, the coating of the stent-graft is prone to expansion to a certain extent. Membrane scaffold loses insulation function

Method used

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Embodiment Construction

[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

[0033] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directl...

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Abstract

The invention relates to a covered stent, comprising a bare metal stent and a covering film covering the bare metal stent, the covering film includes an inner membrane and an adventitia, and the bare metal stent is arranged on the inner membrane and the outer membrane. Between the adventitia, the intima and at least one surface of the adventitia are provided with binding wires distributed along the circumferential direction of the stent-graft, and the stent-graft includes a first region and a The second region connected to the first region, the first region and the second region both extend along the axial direction of the stent-graft, and the coverage of the binding wire in the first region is zero. In the stent-graft, since the binding wire is arranged in the second region, the ability of the stent-graft to resist expansion in the circumferential direction can be improved, and the risk of the stent-graft function failing due to the expansion of the stent-graft can be reduced.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a covered stent for in-situ fenestration. Background technique [0002] Over the past ten years, endovascular repair has become a routine treatment for thoracic aortic aneurysm, aortic dissection, and abdominal aortic aneurysm due to its definite curative effect, less trauma, quick recovery, and fewer complications. However, the principle of endovascular repair technology requires that the lesion has sufficient proximal and distal anchoring areas, and many aortic aneurysms or aortic dissection lesions are close to important arterial branches, which is a taboo for conventional endovascular repair techniques . For example, there are three important branches of the aortic arch, the brachiocephalic trunk, the left common carotid artery, and the left subclavian artery. How to establish the important branches of the aorta is currently a major problem in endovascular aortic aneurysm repa...

Claims

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Application Information

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IPC IPC(8): A61F2/07
CPCA61F2/07A61F2002/072
Inventor 肖本好刘彩萍浦文俊
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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