A hybrid balloon-expandable vascular stent

Abstract

The invention provides a mixed saccule expansion type vascular stent which comprises an open ring zone I, an open ring zone II, a closed ring zone I (33), a closed ring zone II and a closed ring zone III. Each zone comprises a plurality of groups ring-like supporting bodies and connecting ribs, wherein two adjacent groups of ring-like supporting bodies are connected through the connecting ribs. The middle end of the vascular stent adopts a closed ring structure design, the metal coverage rate is improved appropriately, the radial supporting capability of the vascular stent is improved, plaques can be effectively prevented from protruding toward a tubular cavity through mesh holes, and the possibility of thrombosis is reduced. The adjacent ring-like supporting bodies of the open ring zone I and the open ring zone II of the vascular stent are connected in a staggered mode and are connected by using the V-shaped connecting ribs, the flexibility of the stent is improved, blood more easily passes through the lesion blood vessels. A closed ring structure is adopted between the adjacent ring-like supporting bodies at two tail ends of the vascular stent, the supporting bodies are connected by using linear connecting ribs, the longitudinal strength of the vascular stent is improved, and meanwhile the axial shortening rate of the vascular stent is reduced.

Description

Technical field [0001] The invention belongs to the field of interventional medical equipment, and in particular relates to a mixed balloon-expandable blood vessel stent suitable for treating coronary arteries. Background technique [0002] Cardiovascular disease has become one of the main diseases threatening human health. At present, more than 1.5 million patients worldwide receive percutaneous coronary intervention every year. There are three types of treatments for cardiovascular diseases: drug therapy, surgery and interventional therapy. Percutaneous coronary stenting has become the main treatment method for coronary artery disease due to its high efficiency, minimal invasiveness and low medical cost. Percutaneous coronary stents use a balloon delivery system to deliver the stent to the diseased part of the blood vessel. Then the balloon is inflated and expanded to expand the stent, open up the blocked part of the blood vessel, and improve blood supply to the cardiovascular ...

AI Technical Summary

Problems solved by technology

The existing open-loop vascular stents have good flexibility and wall-attachment performance, but the stent has poor radial support ability, and it is easier for plaque to penetrate into the stent, causing restenosis in the stent; the closed-loop vascular stent With stronger radial support force, it can effectively prevent the plaque from protruding into the lumen through the mesh, that is, prevent the plaque from falling off, but has low flexibility

At the same time, it has been found clinically that severe longitudinal deformation may occur at the proximal and distal ends of the stent, resulting in failure of the stent and increasing the risk of stent thrombosis

Images