Covered stent

A covered stent and film-covered technology, applied in stents, medical science, blood vessels, etc., can solve problems such as film damage, achieve the effects of increasing pull-off force, ensuring wall adhesion, and improving bending performance

Active Publication Date: 2015-05-06
SHANGHAI MICROPORT ENDOVASCULAR MEDTECH (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This U.S. patent document describes how to choose the coating material and connecting material in a large number, but does not do any treatment for the wire ends of the braided wire, which may cause damage to the coating, and the U.S. patent document only deals with cylindrical stents with equal diameters Be explained

Method used

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Embodiment Construction

[0039] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the specific embodiments described below in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts should fall within the scope of the present invention.

[0040] figure 1 It is a schematic diagram of the overall appearance of the stent graft of the present invention. like figure 1 As shown, the stent graft 1 of the present invention includes a stent body 2 and a membrane 3 fixed on the stent body 2 . The stent body 2 is divided into a plurality of stent segments 7 along the ...

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Abstract

A coated stent graft (1) comprises a stent graft main body (2) and a coat (3) fixed on the stent graft main body (2). The stent graft main body (2) is divided into multiple stent graft segments (7) along a central axis (X) of the coated stent graft (1), each stent graft segment (7) extends for a circle around the central axis (X) and each stent graft segment (7) is formed by connecting multiple wave rods (8) end-to-end in a wave-shaped structure. The stent graft main body (2) is formed by a small-diameter segment (4), a transition segment (5) and a large-diameter segment (6) along the central axis (X). The transition segment (5) connects the small-diameter segment (4) to the large-diameter segment (6). A space between adjacent stent graft segments in the transition segment (5) is greater than a space between adjacent stent graft segments in the small-diameter segment (4) and less than a space between adjacent stent graft segments in the large-diameter segment (6). The coated stent graft (1) is provided with improved bending performance.

Description

technical field [0001] The invention relates to a covered stent, which can be used for treating abdominal aneurysm and iliac aneurysm. Background technique [0002] There are many types of stent grafts currently on the market for the treatment of abdominal aneurysms and iliac aneurysms. The advantages and disadvantages of each product are different, and the treatment points are also different. The covered stents used for the treatment of abdominal aneurysms and iliac aneurysms should have the following characteristics: they should adapt to tortuous and curved blood vessels, and they should have good adherence, roundness and moderate support strength. [0003] At present, in the domestic and international markets, the evaluation of this type of covered stent mainly includes the following performance indicators: ① Sealability: evaluate the effectiveness of the stent in isolating the tumor cavity and blood; ② Displacement resistance: prevent the stent from shifting after placem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07
CPCA61F2/07A61F2/89A61F2250/0039A61F2250/0014A61F2250/0037A61F2230/0054
Inventor 李中华王丽文朱清高延彬
Owner SHANGHAI MICROPORT ENDOVASCULAR MEDTECH (GRP) CO LTD
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