Chain type coronary stent suitable for coronary artery tortuosity angulation lesion

Abstract

The invention relates to a chain type coronary stent suitable for coronary artery tortuosity angulation and particularly lesion accompanied with vascular calcification. The stent consists of a plurality of closed waveform ring-shaped units which form a cylindrical structure; axial connection in the movement direction of a guide wire is realized between the ring-shaped units by connecting assemblies; the connecting assemblies comprise rigid connecting assemblies and elastic connecting assemblies; the stent adopts every two to four ring-shaped units to form one unit group; the adjacent ring-shaped units in each unit group are connected by the rigid connecting assemblies; the unit groups are connected by the elastic connecting assemblies. According to the stent disclosed by the invention, by arranging the elastic connecting assemblies between the ring-shaped units, higher passing ability is realized under the condition of not changing the thickness between each two ring-shaped units; moreover, the characteristic requirements of radial intensity, fatigue durability, trackability, propelling movement, perspectivity, elastic return and the like of the stent are kept.

Description

Technical field [0001] The invention belongs to the field of medical interventional consumables, and in particular relates to a chain type coronary stent suitable for tortuous angulation of coronary arteries, especially for vascular calcification lesions. Background technique [0002] Percutaneous coronary intervention (PCI) refers to a treatment method in which transcardiac catheter technology can clear the stenosis or even occlusion of the coronary artery lumen, thereby improving myocardial blood perfusion. Among them, coronary artery stenting is a new type of minimally invasive interventional treatment technology. The technology is to deliver a stent into the narrowed part of the coronary artery, and expand the metal stent with a grid-like structure by compressing the stent delivery system. The stent supports the stenosis of the diseased coronary artery, and expands the diameter of the lumen by pressing the plaque on the blood vessel wall to ensure the patency of the blood ves...

AI Technical Summary

Problems solved by technology

[0007] Clinically, for the interventional treatment of such lesions, a stent with a thinner beam size has been tried for treatment. Although the passability of the stent has been improved, the outer diameter of the entire stent is reduced and the supporting force of the entire stent is seriously affected. For lesions with severe vascular calcification at the same time, there will be insufficient supporting force, and there is a risk of stent unloading and coronary artery dissection complications.

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