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stent graft

A stent-graft, covering technology, applied in the field of medical devices, can solve problems such as no solution found

Active Publication Date: 2022-07-05
LIFETECH SCI (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 covering section 11 , a second covering section 13 , and a connecting section 12 connecting the first covering section 11 and the second covering section 13 . Specifically, the connecting segment 12 connects the distal end of the first covering segment 11 and the proximal end of the second covering segment 13 .

[0027] The first film section 11 includes a first support member 111 and a first film 112. The first film 112 covers the inner surface or the outer surface of the first support member 111 so that the first film section 11 has a circumferentially closed hollow. lumen. The number of the first support members 111 may be multiple. In this case, the multiple first support members 111 are axially connected by the first coating film 112 . Similarly, the second film section 13 includes a plurality of second support members 131 and a second film 132 , and the plurality of second support mem...

Embodiment 2

[0039] The stent-graft of this embodiment is substantially the same in structure as the stent-graft of Embodiment 1, and the difference lies in 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 , and the plurality of bare stents 223 are axially arranged and connected by elastic members 221 . Every two adjacent bare brackets 223 are connected by at least one elastic member 221 . The bare stent can be made of braided wire, and two ends of the braided wire can be fixedly connected by a fixing member 224 (eg, a sleeve), thereby forming a circumferentially closed annular bare stent. The end of the elastic piece 221 can also be fixed on the bare bracket by the fixing piece 224 . The elastic members 221 connecting the plurality of bare stents 223 can be approximately in a straight line in the axial direction and extend along the length direction of the stent-graft...

Embodiment 3

[0043] The stent-graft of this embodiment is substantially the same in structure as the stent-graft of Embodiment 1, and the difference lies in 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 wave rings arranged in the axial direction, wherein the proximal end of one wave ring is connected with the distal end portion of the other wave ring. Specifically, the wave ring is a W-shaped wave ring, including a plurality of wave crests 324 and a plurality of wave troughs 325 . The number of wave crests or wave troughs of the multiple wave circles may be the same or different, and preferably, the wave crest of one wave circle has the same number of wave troughs as the adjacent wave circles located at the proximal end thereof.

[0044] For the purpose of description, three adjacent wave circles are defined as a first wave circle 321 , a second wave circle 322 and a third wave circle...

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PUM

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Abstract

The invention discloses a covered stent, comprising a first covered segment, a second covered segment and a connecting segment connecting the first covered segment and the second covered segment, the connecting segment comprising a deformation portion , the axial dimension of the deformation portion can be extended or shortened, and the connecting section further includes an opening communicating with the inner surface and the outer surface of the stent-graft. After the stent-graft of the present invention is implanted into the diseased blood vessel, the stent-graft can ensure that the aneurysm is isolated, even the aneurysm extending across the branches, can ensure the blood supply of the branch blood vessels, and can also adapt to the curved 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] Pathological dilation of the aorta over 50% of the normal vessel diameter is called an aortic aneurysm. The use of covered stent to isolate aortic aneurysm is the current minimally invasive treatment method and development direction of aortic aneurysm. However, when the aortic aneurysm involves important branch vessels or the anchoring area of ​​the aneurysm neck is insufficient, the branch artery inlet is covered and blocked during the treatment process, which will affect the blood supply of the branch. Long-term (such as 15 minutes) ischemia will cause some Permanent loss of organ function. How to achieve both the isolation of aortic aneurysm with a covered stent and the unobstructed blood supply of the branch arteries is currently the bottleneck and difficulty in limiting endovascular treatment of aortic aneurysms. At the same ti...

Claims

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Application Information

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