stent graft

A technology of covered stents and waveforms, which is applied in the field of covered stents, can solve the problems of poor support at the edge of the window and the size of the window is difficult to meet the requirements, and achieve the effect of improving adaptability

Active Publication Date: 2021-08-17
LIFETECH SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the stent-graft in the prior art performs in-situ window opening, there are often problems such as the size of the window is difficult to meet the requirements, or the support of the edge of the window is poor.

Method used

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Embodiment Construction

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0038] It should be noted that "distal end" and "proximal end" are used as orientation words, which are commonly used terms in the field of interventional medical devices, where "distal end" means the end away from the operator during the operation, and "proximal end" means The end near the operator during surgery. Axial refers to the direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device; radial refers to the direction perpendicular to the aforementioned axial direction, and the distance from the axis refers to the distance along the aforementioned radial direction to the axis.

[0039] Such as figure 1 As shown, one of the preferred embodiments ...

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Abstract

The invention discloses a stent-graft, which includes a multi-turn wave-shaped ring. The stent-graft includes an area A along the circumferential direction, and a area B connected to the A area. The wave-shaped ring includes a The first waveform segment in the A region, and the second waveform segment located in the B region, the waveform angle of the first waveform segment is 70°~120°, and the wave height of the first waveform segment The ratio of the spacing to the adjacent first waveform segment is 1 / 4 to 3; the waveform angle of the second waveform segment is 30° to 60°, and the wave height and phase of the second waveform segment The ratio of the distance adjacent to the second waveform segment is 1 / 4 to 3 / 2, and the ratio of the wave height of the first waveform segment to the wave height of the second waveform segment is greater than or equal to 1 / 3 and less than 1. Beneficial effects of the present invention: the A region is not only beneficial to opening the window, but also allows the wave-shaped ring to be close to the edge of the window to provide sufficient support for the edge of the window.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a covered stent. Background technique [0002] In the past ten years, endovascular exclusion of aortic stent grafts has been widely used in thoracic and abdominal aortic aneurysms and arterial dissections. treatment method. However, for special lesions such as the aortic arch, celiac trunk, bilateral renal arteries, or superior mesenteric artery, the use of covered stents will affect the blood supply of arterial branch vessels. In view of this situation, the stent-graft is often opened in situ by laser or mechanical means during the operation, so that the stent-graft produces the expected hole, and then the branch stent is transported to the hole and docked with the stent-graft. This treatment scheme overcomes the dependence on the anatomical structure of human branch vessels. [0003] When the stent-graft in the prior art performs in-situ window opening, there are oft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/91A61M31/00
CPCA61F2/91A61M31/002A61F2/07A61M31/00A61F2/89A61F2002/91508A61F2002/91516A61F2002/91525
Inventor 刘彩萍肖本好
Owner LIFETECH SCI (SHENZHEN) CO LTD
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