Covered stent

A covered stent and film-covered technology, which is applied in the field of medical devices, can solve problems such as easy-to-cause thrombus, and achieve the effect of reducing the risk of thrombus, preventing displacement, and reducing the risk of rupture

Active Publication Date: 2021-06-04
LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above problems, the object of the present invention is to at least solve the problem that the existing covered stents easily cause thrombus at the bend when the outer layer of the stent is adopted as a narrow strip.

Method used

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Examples

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Embodiment Construction

[0032] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0033] It should be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may also be meant to include the plural forms unless the context clearly dictates otherwise. The terms "comprising", "comprising", "containing" and "having" are inclusive and thus indicate the presence of stated...

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Abstract

The invention belongs to the field of medical apparatus and instruments, and specifically relates to a covered stent. The covered stent has a proximal great curvature side and a proximal lesser curvature side; the covered stent includes a main support, an inner layer covering film arranged on the inner side of the main support and an outer layer covering film arranged on the outer side of the main support; the main support includes multiple wave circles spaced in an axial direction, and wave peaks and wave troughs in alternate arrangement are formed on the wave circles; and the outer layer covering film is provided with first openings, and the first openings makes at least one wave trough, located on the proximal great curvature side or close to the proximal great curvature side, exposed to the outside. According to the covered stent of embodiment, the exposed wave troughs are easy to hang on vascular walls, therefore the effects of preventing the covered stent from dislocating can be achieved; and the wave peaks and wave troughs located on the proximal lesser curvature side maintain to be covered by the outer layer covering film, thus, the covering film in the cavity of the stent and wave circle stacking states are along the direction of blood flow, and the risks of thrombosis can be reduced.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a covered stent. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] The aortic stent graft is generally used for minimally invasive interventional surgery in the aortic cavity, mainly for the treatment of aortic diseases such as aortic aneurysm and aortic dissection. purpose of healing. The existing aortic stent graft is mainly composed of a nickel-titanium metal stent and a PTFE membrane. The PTFE covering is divided into inner and outer layers, and the metal stent is wrapped between the outer covering and the inner covering. The inner and outer coatings are tightly fused together through the coating heat treatment process at high temperature. For this type of stent graft, since the metal stent is completely wrapped in the PTFE membrane, all the direct contact with the ves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07A61F2/915A61F2/848
CPCA61F2/07A61F2/915A61F2/848A61F2002/91575A61F2002/8486A61F2002/075A61F2002/072A61F2220/0041A61F2230/0019A61F2250/0037
Inventor 肖本好唐江峰刘彩萍
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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