Non-uniform Poisson ratio vascular stent with controllable bending degree

Abstract

The invention discloses a non-uniform Poisson ratio vascular stent with controllable bending degree. The stent comprises a plurality of connecting rings which are arranged at intervals in the axial direction; a plurality of connecting rods arranged in the circumferential direction are connected between any two adjacent connecting rings; a gap is formed between any two adjacent connecting rods; andfor the length of any one connecting rod, the Poisson ratio of each position of the vascular stent to be arranged is determined according to the bending degree of the blood vessel which needs to be provided with the vascular stent, and a gap between any two adjacent connecting rings and the length of any one connecting rod are determined according to the Poisson ratio of each position of the vascular stent. The non-uniform Poisson ratio vascular stent with the controllable bending degree is good in shape adaptability, the controllable bending degree of the vascular stent is achieved, and therequirement for placing the vascular stent in the complex multi-bend long lesion blood vessel can be met.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a non-uniform Poisson's ratio blood vessel stent with controllable curvature. Background technique [0002] Atherosclerosis is an inflammatory disease in which the arterial walls thicken due to the buildup of plaque, causing the blood vessels to narrow and reduce blood flow through them, affecting the function of various parts of the body. Depending on the location of the affected arteries, severe hardening may lead to coronary artery disease, stroke, peripheral artery disease, or kidney problems. As one of the most common treatments, hardened arteries can be unblocked by placing vascular stents at the diseased site. Typically, a stent is a small tubular structure that is expanded by a balloon catheter to restore the vessel lumen and prevent arterial wall recoil. At present, with the development of medical technology, the existing vascular stents have undergone the evol...

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned stent method designed to deal with curved vessels, because the balloon has a straightening effect during expansion, and the stent will expand rotationally symmetrically with the expansion of the balloon, this will cause a huge longitudinal straightening of the artery direct effect

Although actively deformable vascular stents have been developed, this balloon stent system has a disadvantage that it can only be applied to short lesions with a single curvature.

Therefore, it is difficult to realize the application of complex and curved long diseased blood vessels.

Because the form of diseased blood vessels varies greatly in each patient, the current vascular stents cannot show the same applicability as the degree of curvature of the diseased blood vessels in all individuals

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