A low resilience high support coronary artery degradable stent

Abstract

The invention relates to a low-springback high-support coronary artery biodegradable stent. The stent adopts an integral tubular mesh structure formed by connecting a head end beam column unit, a tail end beam column unit and a plurality of middle section beam column units, wherein the middle section beam column units comprise a plurality of W-shaped structures; adjacent W-shaped structures are staggered; a connection position of two adjacent W-shaped structures in each middle section beam column unit extends to two sides, so as to form a bracket structure; one bottom end of the W-shaped structure extends to two sides, so as to form a bracket structure; the other bottom end of the W-shaped structure extends to one side, so as to form a bottom end extending end; the top end of the W-shaped structure extends to one side, so as to form a top end extending end; the bottom end extending ends and the top end extending ends in two adjacent lines are mutually connected and then are raised; the raised end forms a circular ring; adjacent circular rings are mutually connected through an S-shaped connecting rib. The stent has more stable mechanical properties, and can provide supporting effect with a longer period of time.

Description

technical field [0001] The invention relates to a medical device for interventional treatment of coronary artery stenosis, in particular to a low-rebound high-support coronary artery degradable stent. Background technique [0002] Currently, biodegradable polymer coronary stent intervention is a new method for the treatment of coronary artery stenosis. The stent is positioned by the delivery system to the stenotic lesion site and is stretched and released, so that the lumen of the blood vessel returns to the normal physiological diameter. However, due to the poor mechanical strength of the polymer itself, the stent tends to rebound after decompression and has weak supporting force. The current design of degradable polymer stents refers to the design of metal stents. Such a design cannot overcome the problem of large radial rebound, nor can it provide continuous support during the polymer degradation process, which is likely to cause restenosis of blood vessels. Contents o...

AI Technical Summary

Problems solved by technology

However, due to the poor mechanical strength of the polymer itself, the stent tends to rebound after decompression and has weak support

The current design of degradable polymer stents refers to the design of metal stents. Such a design cannot overcome the problem of large radial rebound, nor can it provide continuous support during the polymer degradation process, which is likely to cause restenosis of blood vessels.

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