Blood vessel stent

Abstract

The invention provides a blood vessel stent. The blood vessel stent comprises a stent near end, a main stent body and a stent far end which are connected in sequence, the main stent body is composed of multiple rows of open supporting units and multiple rows of open flexible units, and the open supporting units and the open flexible units are alternately arrayed; each row of the open supporting units and each row of open flexible units are integrally connected end to end, each open supporting unit is formed by connecting front ripple supporting ribs with reverse ripple supporting ribs, each open flexible unit is formed by connecting front ripple flexible ribs with reverse ripple flexible ribs, and the preset number of open supporting units and the preset number of open flexible units which are axially adjacent to the open supporting units are connected to form a composite closed loop. The two composite closed rings which are axially adjacent to each other are connected through a connection rib. The strength of the open supporting units is greater than that of the open flexible units, and the deformation capacity of the open supporting units is lower than that of the open flexible units. The blood vessel stent has more proper radical supporting force and anchoring force, and excessive extrusion to narrow patches is reduced; the blood vessel stent has more excellent flexibility and attachment performance, and poor wall attachment is avoided.

Description

Technical field [0001] The present invention relates to the field of medical devices, in particular to a blood vessel stent, which can be implanted into intracranial blood vessels to treat diseases caused by symptomatic intracranial artery stenosis. Background technique [0002] Intracranial atherosclerotic stenosis is an important cause of ischemic stroke. It is more common in non-Caucasians such as Asians, Africans and Hispanics. The drug treatment of intracranial artery stenosis mainly includes anticoagulation, antiplatelet aggregation and acute thrombolysis. Antiplatelet aggregation and anticoagulation are the classic treatments for symptomatic intracranial artery stenosis, but the recurrence rate of stroke is still high. Traditional surgical treatment is mainly limited to the common carotid artery or the extracranial segment of the internal carotid artery. The main surgical methods include carotid endarterectomy and external carotid artery-internal carotid artery bypass. [...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a vascular stent, which solves the problem that the existing vascular stent has too much radial support force and easily squeezes the narrow plaque so that the plaque fragments block the branch blood vessels and cause infarction; and solve the problem that the existing vascular stent complies Poor flexibility and low chronic external expansion force may easily lead to malapposition and restenosis

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