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Covered stent

A covered stent and membrane technology, applied in the field of medical devices, can solve the problems of low safety of carotid artery stents, and achieve the effect of good safety in use

Pending Publication Date: 2020-12-04
SUZHOU ZENITH VASCULAR SCITECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a covered stent to solve the problem of lower safety of the existing carotid stent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] figure 1 It is an initial state diagram of the stent graft 20 released in the carotid artery 10 according to the embodiment of the present invention. figure 2 It is a state diagram of an embodiment of the present invention after the stent graft 20 is released in the carotid artery 10 .

[0046] like figure 1 and figure 2 As shown, the carotid artery 10 is divided into a common carotid artery 11 , an internal carotid artery 12 and an external carotid artery 13 , and the common carotid artery 11 , the internal carotid artery 12 and the external carotid artery 13 form a Y-shaped bifurcation structure. The blood of the common carotid artery 11 flows into the internal carotid artery 12 and the external carotid artery 13 respectively at the Y-shaped bifurcation structure. Among them, the blood of the internal carotid artery 12 mainly flows to the brain, and the blood of the external carotid artery 13 mainly supplies the facial organs. There are plaques on the common car...

Embodiment 2

[0066] Figure 7 It is a structural diagram of a stent graft 20 according to the second embodiment of the present invention. like Figure 7 As shown, the same as the first embodiment: this embodiment discloses a stent graft 20, the stent graft 20 includes a stent body 21 and a filter membrane 22, the stent body 21 has a proximal end 211 and a distal end 212, the proximal End 211 is intended to be positioned upstream of the blood vessel relative to distal end 212 . The filter membrane 22 has a mounting portion 222 and a free portion 221 , the mounting portion 222 is connected to the frame body 21 , the free portion 221 is connected to the mounting portion 222 and is free from the frame body 21 .

[0067] After the stent body 21 of the covered stent 20 of the present invention is installed on the Y-shaped bifurcation of the carotid artery 10, the stent body 21 is opened, and the filter membrane 22 is opened along with the stent body 21, and the filter membrane 22 covers the sp...

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Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a covered stent. The covered stent comprises a stent body and a filter membrane; the stent body is provided with a near end and a far end, and the near end is used for being arranged on the upstream of a blood vessel relative to the far end. The filter membrane is provided with a mounting part and a dissociation part, the mounting part is connected to the stent body, and the dissociation part is connected with the mounting part and dissociates from the stent body. After the stent body is installedat a Y-shaped bifurcation of a carotid artery, the stent body is opened, the filter membrane is opened along with the stent body, and the filter membrane covers plaques in blood vessels, so that the plaques can be prevented from being broken and falling off due to extrusion of the stent body. Besides, after the stent body is installed on the common carotid artery and the internal carotid artery, blood flow entering the external carotid artery from the common carotid artery easily rushes through the filter membrane located at the entrance of the external carotid artery, and therefore it is guaranteed that the blood normally enters the external carotid artery. Compared with the prior art, the covered stent is better in use safety.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a covered stent. Background technique [0002] Cerebrovascular disease is a major disease that threatens human health today, and is the third leading cause of death after cardiovascular disease and tumors. Among them, 25% of ischemic strokes are related to carotid artery stenosis or occlusion. [0003] The treatment of carotid artery stenosis is mainly divided into drug therapy, carotid endarterectomy, and carotid artery stenting. Among them, carotid artery stenting has the advantages of simple operation, less trauma, and fewer complications, and is currently one of the effective methods for treating carotid artery stenosis. [0004] The carotid artery is divided into the common carotid artery, the external carotid artery and the internal carotid artery. The common carotid artery, the external carotid artery and the internal carotid artery have a Y-shaped bif...

Claims

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Application Information

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IPC IPC(8): A61F2/07
CPCA61F2/07A61F2002/077A61F2230/0067A61F2250/0039
Inventor 李爽汪泽辉夏洁
Owner SUZHOU ZENITH VASCULAR SCITECH LTD
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