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Covered stent

A covered stent and film-covered technology, applied in the field of medical devices, can solve problems such as no solutions found, and achieve the effect of ensuring blood supply

Active Publication Date: 2020-04-28
LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, for the situation where the aneurysm extends across branch vessels or even involves branch vessels, no better solution has been found so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like figure 1 As shown, the stent graft 10 of this embodiment includes a first membrane segment 11 , a second membrane segment 13 and a connecting segment 12 connecting the first membrane segment 11 and the second membrane segment 13 . Specifically, the connecting section 12 connects the distal end of the first covering section 11 and the proximal end of the second covering section 13 .

[0027] The first coating segment 11 includes a first support 111 and a first coating 112, and the first coating 112 covers the inner or outer surface of the first support 111 so that the first coating segment 11 has a circumferentially closed hollow space. lumen. There may be multiple first support members 111 , and in this case, the multiple first support members 111 are axially connected through the first film 112 . Similarly, the second coating segment 13 includes a plurality of second supports 131 and a second coating 132 , and the plurality of second supports 131 are axially con...

Embodiment 2

[0039] The structure of the stent-graft covered in this embodiment is substantially the same as that of the stent-graft in Example 1, except for the structure of the connecting section. like Figure 4 As shown, the connecting section 22 of the stent-graft in this embodiment includes a plurality of bare stents 223 arranged axially and connected by an elastic member 221 . Every two adjacent bare supports 223 are connected by at least one elastic member 221 . The bare stent can be braided by braiding wire, and the two ends of the braiding wire can be fixedly connected by a fixing member 224 (such as a sleeve), thereby forming a circumferentially closed annular bare stent. The end of the elastic member 221 can also be fixed on the bare support through the fixing member 224 . The elastic member 221 connecting the plurality of bare stents 223 may be substantially in a straight line in the axial direction, and extend along the length direction of the stent-graft.

[0040] The stru...

Embodiment 3

[0043] The structure of the stent-graft covered in this embodiment is substantially the same as that of the stent-graft in Example 1, except for the structure of the connecting section. like Figure 5 As shown, the connecting section 32 of the stent-graft in this embodiment includes at least two axially arranged corrugations, wherein the proximal end of one corrugation is connected to the distal end of the other corrugation. Specifically, the wave ring is a W-shaped wave ring, including a plurality of crests 324 and a plurality of troughs 325 . The number of crests or troughs of the plurality of wave rings may be the same or different, preferably the number of crests of one wave ring is the same as the number of troughs of the adjacent wave ring located at its proximal end.

[0044] For description, the three adjacent corrugations are defined as the first corrugation 321 , the second corrugation 322 and the third corrugation 323 respectively. Wherein, the second wave circle ...

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PUM

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Abstract

The invention discloses a covered stent. The covered stent comprises a first covered section, a second covered section and a connecting section for connecting the first covered section and the secondcovered section, the connecting section comprises a deformation part, the axial size of the deformation part can be lengthened or shortened, and the connecting section further comprises an opening forcommunicating the inner surface and the outer surface of the covered stent. After the covered stent is implanted into a diseased blood vessel, the covered stent can isolate aneurysm, even aneurysm extending across branches, blood supply of branch blood vessels can be guaranteed, and meanwhile the covered stent can adapt to bent diseased blood vessels.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a covered stent. Background technique [0002] When the pathological dilation of the aorta exceeds 50% of the normal vessel diameter, it is called an aortic aneurysm. Using covered stents to isolate aortic aneurysms is the current minimally invasive treatment method and development direction of aortic aneurysms. However, when the aortic aneurysm involves important branch vessels or the anchorage area of ​​the aneurysm neck is insufficient, the branch artery entrance will be covered and blocked during the treatment, which will affect the branch blood supply, and long-term (such as 15 minutes) ischemia will lead to some Permanent loss of organ function. How to isolate the aortic aneurysm with a stent-graft and ensure the smooth blood supply of the branch arteries is the current bottleneck and difficulty in the limited endovascular treatment of aortic aneurysms. At the same time, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07A61F2/915
CPCA61F2/915A61F2/07A61F2002/823A61F2002/065
Inventor 秦翠芳黄新鑫
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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