Y-shaped carotid artery stent with absorbable self-protruding membrane branch

Abstract

The invention provides a Y-shaped carotid artery stent with an absorbable self-protruding membrane branch, so as to treat carotid artery stenosis. The Y-shaped carotid artery stent is characterized bycomprising an inner net pipe, which is a hollow pipe; an outer net pipe, which is arranged on the outer wall of the inner net pipe in a sleeving manner; and a membrane pipe, which is mounted betweenthe inner net pipe and the outer net pipe and is arranged on the outer wall of the inner net pipe in a sleeving manner, wherein each of the inner net pipe, the outer net pipe and the membrane pipe hasa trunk part, a first branch part and a second branch part opposite to the first branch part; one end of the trunk part is communicated with the ends of the corresponding first branch part and the corresponding second branch part to form an integrated Y shape matched with the shape of a bifurcation structure; the trunk parts are placed in the common carotid artery; the corresponding first branchparts are placed in the internal carotid artery; the corresponding second branch parts are placed in the external carotid artery; the inner net pipe and the outer net pipe are both pipes of mesh structures made of memory metal wires; and the pore size of the inner net pipe is less than that of the outer net pipe.

Description

technical field [0001] The invention relates to a carotid artery stent, in particular to a Y-shaped carotid artery stent with absorbable self-processed membrane branches. Background technique [0002] Cerebrovascular disease is a major disease that threatens human health today, and it is the third leading cause of death after cardiovascular diseases and tumors. Carotid artery stenosis is the main risk factor and etiological basis of ischemic cerebrovascular disease, and 25% of ischemic strokes are related to carotid artery stenosis or occlusion. [0003] Such as Figure 5 As shown, the carotid artery 1 has a "Y"-shaped bifurcation structure, including the common carotid artery 2, the internal carotid artery 3, and the external carotid artery 4. The blood in the common carotid artery 2 flows into two bifurcations, the internal carotid artery 3 and the external carotid artery 4 respectively, wherein the blood in the internal carotid artery 3 mainly flows to the brain. The ca...

AI Technical Summary

Problems solved by technology

However, if the pores of the small-pore network tube are too small, it will have a great blocking effect on the blood flowing from the common carotid artery to the external carotid artery. On the contrary, if the pores of the small-pore network tube are larger, its blocking effect on debris is not ideal.

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