Gradual changed thickness coronary stent suitable for coronary artery tortuosity angulation lesion

Abstract

The invention belongs to the field of medical interventional consumables and particularly relates to a gradual changed thickness coronary stent suitable for coronary artery tortuosity angulation and particularly lesion accompanied with vascular calcification. The stent disclosed by the invention consists of a plurality of closed waveform ring-shaped units; axial connection in the movement direction of a guide wire is realized between the ring-shaped units by connecting pieces; the stent is divided into a head end and a tail end in the movement direction of the guide wire; under the condition of ensuring the inner diameters of all the ring-shaped units to be consistent, the outer diameter of the stent in an extended state is gradually increased from the vertex position of the head end of the stent to the vertex position of the tail end of the stent so as to form a truncated cone-shaped stent structure. On the premise of enabling the stent to be thin as possible, other characteristics of radial intensity, fatigue durability, trackability, propelling movement, perspectivity, elastic return and the like of the stent can be kept; the gradual changed thickness coronary stent is suitable for coronary artery tortuosity angulation and particularly lesion accompanied with vascular calcification.

Description

technical field [0001] The invention belongs to the field of medical interventional consumables, and in particular relates to a coronary stent with gradual thickness suitable for tortuous and angled coronary arteries, especially with vascular calcification lesions. Background technique [0002] Percutaneous coronary intervention (PCI) refers to a treatment method that dredges the narrowed or even occluded coronary artery lumen through cardiac catheterization, thereby improving the blood perfusion of the myocardium. Among them, coronary artery stenting is a new type of minimally invasive interventional treatment technology. This technology is to send the stent into the lesion stenosis in the coronary artery, and pressurize the stent delivery system to expand the metal stent with a grid structure. The stent supports the narrowed coronary artery and expands the diameter of the lumen by pressing the plaque on the vessel wall to ensure the smoothness of the lumen of the vessel wh...

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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