Stent Graft

A covered stent and film-covered technology, which is applied in the field of medical devices, can solve the problems of affecting blood flow, reducing the sealing effect of covered stents, type I endoleaks, etc., and achieve the effect of improving release accuracy

Active Publication Date: 2022-04-05
LIFETECH SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the anchoring area is relatively small, the anchoring accuracy of the existing stent grafts is insufficient. If the anchoring position deviates to the distal end, the sealing effect of the stent graft will be reduced, and even cause type I endoleak. Proximal deviation can easily cause partial or complete coverage of branch vessels, affecting blood flow

Method used

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Embodiment Construction

[0015] 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.

[0016] 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 present invention relates to a membrane-grafted stent, comprising a membrane-covering unit and an exposed unit connected with the membrane-covering unit, the membrane-covering unit includes a first area, and the first area is arranged near the membrane-covering unit One end of the exposed unit, the first area is connected to the exposed unit, and the rigidity of the first area is greater than that of the exposed unit. In the aforementioned stent graft, since the stiffness of the exposed unit is smaller than that of the first region, during the release process, the exposed unit can be bent and deformed so that the first region is completely attached to the vessel wall, preventing the stent graft from shifting during the release process. The risk of release is improved, and because the rigidity of the first region is greater, it can provide greater axial support and reduce the risk of displacement of the stent graft after implantation.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a covered stent. Background technique [0002] Thoracic aortic aneurysm refers to an aneurysm that occurs in the aortic sinus, ascending aorta, aortic arch, or descending aorta. It is an abnormal expansion, deformation, and tumor-like protrusion of the thoracic aorta. The "tumor-like" mass formed by local or multiple irreversible expansion or bulging of the thoracic aorta caused by various reasons is called an aneurysm. [0003] Thoracic endovascular aortic repair (TEVAR) was first proposed by Parodi and used for the treatment of thoracic aortic dilatation disease, and then gradually used for the treatment of Stanford B aortic dissection (TBAD) . Through research and technical improvement in recent years, it has become the preferred treatment method for various types of TBAD, including acute phase, chronic phase, stable type and unstable type, basically replacing the traditional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/07
CPCA61F2/07
Inventor 肖本好浦文俊
Owner LIFETECH SCI (SHENZHEN) CO LTD
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