A self-expandable tapered vascular stent for multiple stenosis of tapered blood vessels

Abstract

The invention provides a self-expanding tapered vascular stent applied to multiple stenosis of a tapered blood vessel, comprising a plurality of plaque contact areas and blood vessel contact areas; Both the plaque contact area and the blood vessel contact area respectively include multiple groups of corrugated supports, and the diameters of adjacent corrugated supports are reduced in equal proportions, so that the stent is tapered along the axial direction; each group of corrugated supports includes a plurality of unit waves; the present invention The sub-regional design is adopted to reduce the damage to the blood vessel after stent implantation. Compared with the blood vessel contact area, the plaque contact area has a shortened peak-to-valley length, increased rib thickness and rib width, and increased unit wave length. The number of waves is increased to enhance the radial support force. In addition, the stents in the plaque contact area are connected by rigid connectors, which enhances the circumferential rigidity of the stents. At the same time, there are several semicircular grooves in contact with blood on the inner surface of the vascular stent, so as to improve the blood flow in the vascular stent and prevent the occurrence of restenosis.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a self-expanding tapered blood vessel stent used for multiple stenosis of tapered blood vessels. Background technique [0002] Cardiovascular and cerebrovascular disease is a disease that seriously threatens human beings, especially the common diseases of middle-aged and elderly people over 50 years old. The number of vascular diseases is as high as 15 million people, ranking first among all causes of death. As a medical device for interventional treatment of cardiovascular disease, vascular stent has the advantages of minimally invasive, high efficiency and fast postoperative recovery time in the treatment of vascular stenosis. Therefore, it has been widely recognized and applied in recent years. At present, there are many types of vascular stents for a single stenosis disease, each with its own advantages and disadvantages, but the vascular stents for multi...

AI Technical Summary

Problems solved by technology

Relevant clinical studies have also shown that the use of round straight stents for implantation in conical vessels has certain limitations and may cause vascular damage to distal vessels

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