Vertebral artery stent

Abstract

The invention discloses a vertebral artery stent. Aiming at the problem of restenosis after implantation of a stent of a starting portion of a vertebral artery, the vertebral artery stent with an asymmetric ellipse-like section is designed. The vertebral artery stent consists of annular supporting bodies which are longitudinally stacked and connecting ribs for connecting the adjacent annular supporting bodies. The two sides of the stent are divided into two arc-shaped side faces with large curvature and small curvature, different degrees of supporting can be carried out according to the characteristics of blood vessels of the starting section of the vertebral artery, the blood vessel walls are subjected to different supporting forces, an asymmetric blood vessel section is formed, and therefore, a hemodynamic environment in the blood vessel is changed. Meanwhile, in the stent, the large-curvature sides and the small-curvature sides of the adjacent annular supporting bodies are connectedthrough the connecting ribs having different structures, the directions of the stent can be distinguished conveniently, and therefore, the direction can be better distinguished when the stent is implanted into the blood vessel of the vertebral artery.

Description

technical field [0001] The invention belongs to the field of vascular stents, in particular to a vascular stent implanted into a vertebral artery. Background technique [0002] Cerebrovascular disease is one of the three major diseases that cause human death. Cerebral ischemic stroke accounts for about 80% of cerebrovascular diseases, and cerebrovascular stenosis is its most important cause. Stenosis at the origin of the vertebral artery accounts for 25% to 40% of all cerebrovascular stenosis. Drug treatment cannot reverse the morphological changes that have already been caused, and the site is not suitable for surgery due to factors such as difficult treatment techniques and high risks. Since the 1980s, endovascular angioplasty has been used to treat vertebral artery stenosis, including balloon dilatation and stent placement. The success rate of the operation is high, but the problem of postoperative restenosis cannot be ignored. Restenosis refers to the recurrence of ste...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention discloses a new type of stent for asymmetric stenosis at the initial part of the vertebral artery. The stent has the advantages of improving the local hemodynamic environment, improves the use efficiency, and solves the problem of stent implantation. The problem of restenosis of the initial segment of the vertebral artery caused by the asymmetric hemodynamic environment in the future, and the problem that the stent cannot be used for a long time

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