Vertebral artery stent

A vertebral artery and annular support technology is applied in the field of vascular stents implanted in vertebral arteries, which can solve the problems of stenosis of the initial segment of the vertebral artery and the inability of the stent to be used for a long time.

Active Publication Date: 2020-07-07
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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Embodiment

[0027] In this embodiment, the vascular stent has five annular supports and eight groups of connecting ribs 2, each group of four connecting ribs. In each annular support body 1 , the side with a smaller curvature has 4 U-shaped support units, and the side with a larger curvature also has 4 U-shaped support units. Two adjacent annular supports 1 adopt a closed-loop, peak-to-valley connection form, and the peaks and troughs are connected by connecting ribs 2. In this embodiment, the connecting ribs 2 on the side with large curvature are all I-shaped, and the ones with small curvature The connecting ribs 2 on one side are all V-shaped; the above-mentioned I-shaped connecting ribs and V-shaped connecting ribs can be distinguished under X-ray perspective.

[0028] Due to the difference in the opening angle of the U-shaped structure on both sides, the equivalent stiffness of the side with the smaller curvature of the annular support body 1 is greater than the equivalent stiffness o...

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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...

Claims

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Application Information

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IPC IPC(8): A61F2/90
CPCA61F2/90A61F2210/0004A61F2210/0061
Inventor 张弛柳朝晖林贝勒
Owner BEIHANG UNIV
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