Window-opening type covered stent

A stent-graft and fenestration technology, applied in the field of medical devices, can solve problems such as trauma, shorten the operation time, improve the operation efficiency, and avoid the need for customized stents

Pending Publication Date: 2019-06-28
HANGZHOU WEIQIANG MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hybrid technique has certain feasibility and advantages in the treatment of type A dissection lesions, it still requires a thoracotomy. Compared with the intracavitary intervention technique, the hybrid technique has greater trauma
[0012] To sum up, although there are currently some methods for

Method used

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  • Window-opening type covered stent
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  • Window-opening type covered stent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1, such as Figure 1-2 As shown, a stent graft includes a tubular tubular body, and the tubular body includes a first tubular body 110, a second tubular body 120 and a third tubular body 130 arranged in sequence from the proximal end to the distal end; The diameter of the distal end of the tubular body 110 is larger than the diameter of the proximal end of the second tubular body 120, and the distal end of the first tubular body 110 includes an extension part 118 and a connecting part 117 connected to the proximal end of the second tubular body 120; There is at least one first window 150, the distal end surface of the extension part 118 is perpendicular to the central axis of the stent; A window 150 is closed to the gap between the first tube body 110 and the second tube body 120 .

[0054] The fenestration-type stent graft of the present invention is divided into three parts, the first tube body 110, the second tube body 120 and the third tube body 130, these t...

Embodiment 2

[0068] Embodiment 2, this embodiment is an improvement on the basis of Embodiment 1.

[0069] Such as Figure 9 As shown, the arrangement of the first pipe body 110 and the third pipe body 130 in the embodiment is the same as that of the embodiment 1, and the difference from the embodiment 1 is that the second pipe body 120 is provided with a second window 161, and the first pipe body 120 is provided with a second window 161. The two windows 161 are arranged on the same side of the first window 151 , the same side refers to the same side of the bracket viewed in the axial direction, and the second window 161 is close to the first window 151 . The second tube body 120 is provided with an embedded tube body 160 corresponding to the second window 161 , and the outer end of the embedded tube body 160 is fixedly connected with the second tube body 120 . The embedded tube body 160 includes at least a tubular embedded coating, and a support frame may be fixed on the inner or outer w...

Embodiment 3

[0072] Embodiment 3: This embodiment is an improvement on the basis of Embodiment 2.

[0073] Such as Figure 12 As shown, the arrangement of the third tubular body 130 of the tubular stent graft in Embodiment 3 is consistent with that in Embodiment 2, and will not be repeated here.

[0074] Different from Embodiment 2, only one embedded tube 150 is provided at the first window 151 on the first tube 110, and two second windows 161 are provided on the second tube 120, and two second windows 161 are provided on the second tube 120. The positions of the two windows 161 are located on the same side of the first window 151 of the first tube body 110; an embedded tube body 160 is respectively arranged in the second window, and the embedded tube body 160 can be a soft artificial blood vessel; The tube body 160 includes at least a tubular embedded coating, and a support frame may be fixed on the inner wall or the outer wall of the embedded coating to strengthen the overall strength o...

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Abstract

The invention discloses an window-opening type covered stent which comprises a tubular pipe body. The pipe body comprises a first pipe body, a second pipe body and a third pipe body which are arrangedin sequence from the proximal end to the distal end; the distal diameter of the first pipe body is larger than the proximal diameter of the second pipe body; the distal end of the first pipe body comprises an extension part and a connection part connected with the proximal end of the second pipe body; at least one first window is arranged at the distal end of the extension part of the first pipebody, and the distal end face of the extension part is perpendicular to the central axis of the stent; the extension part of the distal end of the first pipe body is provided with a transverse end covering film which closes a gap between the first window or the embedded pipe body and the first pipe body and the second pipe body. According to the covered stent, customization is not needed, the application range is wide, and simple in surgical operation.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a stent, in particular to a fenestration-type covered stent that can be used for aortic vascular disease. Background technique [0002] Aortic aneurysm refers to the local or diffuse abnormal expansion of the aortic wall, which compresses the surrounding organs and causes symptoms, and tumor-like rupture is its main risk. According to the structure, aortic aneurysm can be divided into true aortic aneurysm, false aortic aneurysm and dissecting aortic aneurysm. The aortic aneurysm causes an increase in the inner pressure of the blood vessel, so it is progressively enlarged. If it develops for a long time, it will eventually rupture. The larger the aneurysm, the greater the possibility of rupture. According to statistics, without surgical treatment, 90% of thoracic aortic aneurysms will die within 5 years, and 3 / 4 of abdominal aortic aneurysms will die within 5 years. [000...

Claims

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Application Information

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IPC IPC(8): A61F2/90
Inventor 符伟国王永胜李安伟尚里曼
Owner HANGZHOU WEIQIANG MEDICAL TECH CO LTD
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