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Covered stent and manufacturing method thereof

A technology of a covered stent and a manufacturing method, which is applied in the field of vascular stents, can solve problems such as the complexity of implanting a covered stent, and achieve the effects of reducing implantation costs, convenient and simple implantation operations, and simple implantation operations

Active Publication Date: 2021-05-04
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the complicated problem of implantation of existing stent grafts, thereby providing a stent graft that is easy to implant and matches the curved configuration of the aortic arch and its manufacturing method

Method used

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  • Covered stent and manufacturing method thereof
  • Covered stent and manufacturing method thereof
  • Covered stent and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The stent graft of this embodiment, such as figure 1 - image 3 As shown, it includes a frame body, a covering film 23 and a bending piece 1 .

[0038] The frame body is straight and includes a keel 21 and a bracket 22 . The frame body is nickel-titanium alloy material.

[0039] The keel 21 is long and has two pieces, which are respectively arranged on the inner side and the outer side of the frame body when it is bent.

[0040] There are a plurality of brackets 22 in a zigzag ring structure. The plurality of brackets 22 are arranged on the keel 21 along the length direction of the keel 21 and evenly distributed in the length direction of the keel 21 .

[0041] The covering film 23 is arranged on the inner side of the frame body, and is connected with the frame body by sewing.

[0042]There are two bending pieces 1 connected to the two keels 21 , and the bending pieces 1 are located between the frame body and the covering film 23 . The bending part 1 is a nickel-ti...

Embodiment 2

[0049] In this example, if image 3 As shown, two keels 21 are provided, which are respectively arranged on the inner side and the outer side of the bending when the frame body is bent; a plurality of brackets 22 are evenly distributed in the length direction of the keel 21; The length direction of the frame body is set, and there are four pieces, two of which are set on the two keels 21, and the other two are set on a plurality of the brackets 22.

[0050] Of course, three, five, or six bending pieces 1 may also be provided, which need to be evenly distributed on the frame body, so as to drive the bending of the frame body when the bending piece 1 resumes bending.

Embodiment 3

[0052] The manufacturing method of the stent graft of the present embodiment, such as Figure 4 shown, including the following steps:

[0053] Make a mold according to the curved configuration of the patient's aortic arch;

[0054] Put the curved part 1 into the mold at a temperature of 400°-500° to perform bending shape memory treatment;

[0055] mark the bending direction on the bending piece 1;

[0056] At the second set temperature, after the bending piece 1 is straightened, the bending piece 1 is connected to the frame body, and then the frame body is connected to the covering film 23 .

[0057] Wherein, when the bending piece 1 is connected to the frame body, the bending direction marked on the bending piece 1 is consistent with the development mark 31 of the coating 23 .

[0058] In the manufacturing method of the stent-graft of this embodiment, the mold is made according to the curved configuration of the patient's aortic arch, so a more suitable stent-graft can be ...

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Abstract

The invention belongs to the field of vascular stents, in particular to a covered stent and a manufacturing method thereof. The stent-graft includes a frame body and a bending part; at least one bending part is arranged on the frame body along the length direction of the frame body; The human body returns to the bent state under the first set temperature adapted to by the human body. The covered stent of the present invention has the advantages of simple implantation and matching with the curved configuration of the aortic arch.

Description

technical field [0001] The invention belongs to the field of vascular stents, in particular to a covered stent and a manufacturing method thereof. Background technique [0002] Aortic aneurysm and aortic dissection are frequent diseases in the cardiovascular system. Among them, aortic aneurysm is manifested by local expansion of the artery, and the mechanical properties of the vessel wall are reduced. After the condition worsens, it is easy to cause aneurysm rupture, and the mortality rate is extremely high. Media and adventitia, caused by the formation of false lumen, the most serious result is dissection rupture and bleeding, the rupture process is very painful and the mortality rate is also high. At present, both diseases can be treated by implanting a covered stent, which separates the blood from the vessel wall and prevents the blood flow from directly acting on the vessel wall. However, a large number of case follow-up records found that there are still a certain pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/07A61F2/82
CPCA61F2/07A61F2/82A61F2002/823
Inventor 孙安强杨雅清樊瑜波邓小燕
Owner BEIHANG UNIV