Super-adaptive nitinol intravascular stent

Abstract

The invention relates to a medical device, which provides a super-compliant nickel-titanium alloy vascular stent, which includes a plurality of stent units sequentially connected along the axial direction, and each of the stent units is sequentially formed in a sinusoidal manner along the circumferential direction structure, and the stent units at both ends of the vascular stent adopt a peak-to-peak structure, and the middle stent unit adopts a peak-to-trough structure, so that both ends of the stent have compliance, and there is a connection between two adjacent stent units, While ensuring the flexibility of the stent without losing its radial support force, the "fish mouth" effect when the stent is bent is effectively reduced.

Description

technical field [0001] The invention relates to a medical device, in particular to a super-compliant nickel-titanium alloy vascular stent. Background technique [0002] At present, intravascular interventional therapy of vascular stents has gradually become the main treatment method for vascular stenosis diseases. The principle is that the implanted stent usually reaches the lesion site through the delivery system, and then rebuilds the blood vessel after dilation, thereby treating vascular stenosis. This method has the following advantages: less trauma, less complications, high safety, less pain for patients, easy to accept, short hospital stay, and can be tolerated by elderly patients with severe illness. [0003] Among the performance indicators of the stent, the compliance and expansion properties of the stent play a crucial role in the clinical effect both during and after the operation. The compliance performance affects the ability of the stent to straighten the bloo...

AI Technical Summary

Problems solved by technology

For example, a single helical structure can improve the overall flexibility of the stent and improve the passing performance of the stent, but the radial performance of the stent will be affected, and a "fish mouth" phenomenon may occur when the vascular stent is sharply bent (when the vascular stent is bent, Due to the impact of the bracket structure, there is a large gap between two adjacent bracket units of the bracket, which looks like a fish mouth), or a structure of multiple connecting units is used between adjacent bracket units, which can obtain a better axial direction. stability, but its radial support and compliance will be affected

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