Magnesium alloy vertebral artery degradable stent

Abstract

The invention discloses a magnesium alloy vertebral artery degradable stent and relates to the technical field of vertebral artery stents. The magnesium alloy vertebral artery degradable stent specifically comprises a stent outer frame, wherein both ends of the stent outer frame are moveably connected with one ends of rhombus stents through connecting pins; and the rhombus stents are moveably connected with one ends of connecting rods through connecting pins. According to the magnesium alloy vertebral artery degradable stent, due to selection of a magnesium alloy material of the magnesium alloy vertebral artery degradable stent, the stent made of the magnesium alloy has a good degradation speed effect in a human body, and the purpose of shortening the stent degradation time is achieved; due to arrangement of connecting rod tubes in a transverse direction and a longitudinal direction, the diameter of the stent is increased under the action of an airbag, and a function of supporting a vertebral artery is achieved; and due to arrangement of a fixing rod on a rhombus, the length of the stent can be increased through the conical push rod, an effect of well protecting a lesion blood vessel can be achieved, and the purpose that the size of the stent can be changed in a diameter direction and a length direction as well can be achieved.

Description

technical field [0001] The invention relates to the technical field of vertebral artery stents, in particular to a magnesium alloy vertebral artery degradable stent. Background technique [0002] Atherosclerosis in the vertebral artery system is one of the main causes of posterior circulation stroke, and about one-fifth of posterior circulation stroke occurs in the extracranial segment of the vertebral artery. There are many treatment options for symptomatic vertebral artery stenosis: secondary prevention with antiplatelet aggregation drugs alone, the annual stroke incidence rate is still as high as 15%; warfarin therapy is as effective as aspirin therapy, but the risk of bleeding is much lower increase; the surgical procedure is complicated, the risk is high, and its widespread clinical application is also limited. Vertebral artery stenosis has little effect on drug treatment, and the risk of surgery is too high and the limitations are too large. Endovascular treatment has...

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, the vertebral artery stent also has many deficiencies. In terms of materials, the vertebral artery stent degrades slowly in the human body, and the therapeutic effect is too long. The vertebral artery stent can only be expanded longitudinally under the action of the balloon, and cannot implementation changes its length

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