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Covered stent

A covered stent and film-covered technology, which is applied in the field of medical devices, can solve the problems of not being able to use the emergency department, the difficulty of reconstructing multi-branch arteries, and the long time it takes to achieve the effect of less difficult surgery and avoiding long-term ischemia

Pending Publication Date: 2022-06-03
LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the fenestration stent technology is difficult to locate, needs to be customized, takes a long time, and cannot be used in emergency; the chimney stent technology is prone to endoleaks, and is limited by the anatomical shape of the blood vessels, making it difficult to reconstruct multi-branched arteries
At the same time, no matter whether the fenestration stent or the chimney stent is used, the branch artery is always in a state of ischemia before the branch artery is reconstructed, and the probability of postoperative complications is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] like figure 1 As shown, the stent-graft 10 of the present embodiment has a hollow tubular structure with openings at both ends as a whole, including a main stent 11 , a branch stent 12 , an inscribed membrane 14 and a window support 15 . The surface of the main body bracket 11 is provided with a window 13, and the edge of the inner covering film 14 is connected to the main body bracket 1; the window support 15 is provided outside the inner covering film 14 and protrudes outward from the inner covering film 14. surface. A through hole is opened on the inner covering film 14, and the through hole is communicated with the inner cavity of the covered stent 10; such as image 3As shown, the branch stent 12 has a hollow cylindrical structure, which is arranged inside the stent graft 10 and communicates with the through hole on the inner covering film 14 , so that blood can flow into the branch blood vessel after passing through the branch stent 12 . In this embodiment, the ...

Embodiment 2

[0069] like Figure 10 As shown, the structure of the stent-graft 40 of this embodiment is substantially the same as that of the stent-graft 10 of the first embodiment, and the difference lies in the window support 45 . The window support 45 of this embodiment is formed separately, and the main body support 411 opposite to the window support 45 has an open structure, that is to say, the support of other parts of the main body frame is a closed annular structure, and the window support 45 has an open structure. The opposing body support 411 is not a complete annular shape.

[0070] like Figure 11 and Figure 12 As shown, the window support 45 of this embodiment includes a plurality of support sections 451, the plurality of support sections 451 are connected with the edge of the main body bracket window 43, and the plurality of support sections 451 are connected by hooking each other, thereby forming a net Mesh of holes 456 . The mesh structure includes sections formed by w...

Embodiment 3

[0079] The structure of the stent-graft in this embodiment is substantially the same as the structure of the stent-graft in the second embodiment, and the difference lies in the window support 65 . like Figure 15 and Figure 16 As shown, the window support member 65 of this embodiment is made of cross-woven braided wires 657, and the mesh holes 656 are in a diamond-shaped structure. When forming the mesh hole 656, the adjacent braided filaments overlap each other to form a movable intersection, so that the four vertices of the mesh hole 656 can be moved, and the range of movement is compared with the movement of the movable intersection formed by the interlocking method. The range is larger, so that this embodiment does not limit the mesh size too much, and even if the mesh size is small, it can adapt to the implantation of the bridging bracket and play a stabilizing effect on the bridging bracket. In addition, the window support of this embodiment does not have structures ...

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Abstract

The invention provides a covered stent which comprises a main body covering film, a window is formed in the surface of the main body covering film, the covered stent further comprises an inscribed covering film, the edge of the inscribed covering film is connected with the main body covering film, and the window comprises a first edge and a second edge which extend in the length extending direction of the covered stent. And the inner connecting covering film and the main body covering film are independently formed and then are spliced and connected. According to the covered stent, the internally connected covering film and the main covering film are independently formed and then spliced, so that the manufacturing difficulty of the covered stent is greatly reduced.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a covered stent. Background technique [0002] Aortic aneurysm and aortic dissection are diseases that seriously endanger human life. Without active treatment, the aortic aneurysm and dissection will continue to expand and eventually rupture, resulting in serious complications and death. With the increasing number of patients with hypertension, hyperlipidemia and hyperglycemia, the incidence of aortic aneurysm and aortic dissection is also increasing significantly. [0003] Traditional open surgery for aortic aneurysm and aortic dissection has the advantages of large trauma, high mortality, long operation time, high incidence of postoperative complications and high surgical difficulty, while endovascular treatment has less trauma and fewer postoperative complications. Due to the characteristics of short operation time and low operation difficulty, it has gradually become the main ...

Claims

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Application Information

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IPC IPC(8): A61F2/856A61F2/90
CPCA61F2/856A61F2/90A61F2002/821A61F2002/823
Inventor 肖本好明廷伯
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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