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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 inability to use emergency treatment, high difficulty in reconstructing multi-branched arteries, and restricted vascular anatomy, so as to achieve the effect of less difficult surgery and avoid 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

[0047] like figure 1 As shown, the stent graft 10 of this embodiment is a hollow tubular structure with openings at both ends as a whole, including a main body stent 11 , a branch stent 12 , an internal graft 14 and a window support 15 . Wherein, the surface of the main frame 11 is provided with a window 13, and the edge of the inscribed film 14 is connected to the main body frame 1; surface. A through hole is provided on the inner covering film 14, and the through hole communicates with the lumen of the stent graft 10; as image 3 As shown, the branch stent 12 is a hollow cylindrical structure, which is arranged inside the stent graft 10 and communicates with the through hole on the inner graft 14 , so that blood can flow into the branch blood vessel after passing through the branch stent 12 . In this embodiment, the stent graft 10 includes three branch stents 12 , wherein two branch stents 12 are arranged near the proximal end of the window 13 , and one branch stent 12 is ...

Embodiment 2

[0068] 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, except for the window support member 45 . The window support 45 of the present embodiment is formed separately, and the main body support 411 opposite to the window support 45 is an open structure, that is to say, the support of other parts of the main body support is a closed ring structure, and the window support 45 and the other parts of the support are closed ring structures. The opposing body support 411 is not a complete ring.

[0069] like Figure 11 and Figure 12 As shown, the window support member 45 of this embodiment includes a plurality of support segments 451, the plurality of support segments 451 are connected to the edge of the main frame window 43, and the plurality of support segments 451 are connected by hooking each other, thereby forming a network with a net. A network of holes 456 . Th...

Embodiment 3

[0078] The structure of the stent-graft in this embodiment is substantially the same as the structure of the stent-graft in the second embodiment, except for the window support 65 . like Figure 15 and Figure 16 As shown, the window support member 65 of this embodiment is formed by cross-braiding braiding wires 657, and the mesh 656 has a diamond-shaped structure. When the mesh 656 is formed, adjacent braided filaments overlap each other to form movable intersections, so that the four vertices of the mesh 656 can move, and the range of motion is compared with that of the movable intersections formed by the interhanging method. The range is larger, so the present embodiment does not have too many restrictions on the size of the mesh, even if the size of the mesh is small, it can also adapt to the implantation of the bridging stent and stabilize the bridging stent. In addition, the window support in this embodiment does not have structures like crests or troughs except for th...

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Abstract

The invention provides a covered stent which comprises a main stent body, a window is formed in the surface of the main stent body, the covered stent further comprises an inscribed covering film, the edge of the inscribed covering film is connected with the main stent body, and a through hole communicated with an inner cavity of the covered stent is further formed in the inscribed covering film; the covered stent further comprises a window supporting piece, the window supporting piece is arranged outside the inner connecting covering film and protrudes outwards out of the surface of the inner connecting covering film, the window supporting piece comprises a net-shaped structure with meshes, and the size of the meshes can be changed under the action of external force. The covered stent provided by the invention can adapt to implantation of bridging stents of different sizes, the bridging stents cannot be extruded by the weaving wires, the positions of the bridging stents can be fixed to a certain extent, and the blood flow impact resistance stability of the implanted bridging stents is enhanced.

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 currently diseases that seriously endanger human life. If not actively treated, the aortic aneurysm and dissection will continue to expand and eventually rupture, causing serious complications and death. With the continuous increase of patients with hypertension, hyperlipidemia and hyperglycemia, the incidence of aortic aneurysm and aortic dissection is also significantly increasing. [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 difficulty of operation, while endovascular treatment has the advantages of less trauma and fewer postoperative complications. Due to the short operation time and low operation difficulty, it has gradually become ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/856A61F2/90
CPCA61F2/856A61F2/90A61F2002/821A61F2002/823
Inventor 舒畅肖本好明廷伯
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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