Uniformly expandable degradable scaffold structure with high support stiffness

Abstract

The invention discloses a uniformly-expandable high-support-stiffness degradable stent structure, and relates to the field of vascular interventional medical treatment. On the basis of an original stent structure, a sliding strip with a lock catch structure is inserted between every two connecting ribs in the middle of a stent in the circumferential direction of the stent; due to the lock catch structures of the sliding strips, the sliding strips have the characteristic of one-way sliding, in this way, through the mechanism design, on the one hand, the vascular stent is allowed to radially expand, on the other hand, the stent is prevented from radially contracting, and finally the supporting performance of the stent is improved. In addition, multiple sliding strips are uniformly distributed and have strong interaction with one another, and the uniform expansion of the stent is ensured.

Description

technical field [0001] The invention relates to the medical field of vascular intervention. Specifically, the present invention relates to a degradable zinc alloy vascular stent with high support rigidity, that is, a sliding bar with a locking structure is inserted between every two connecting ribs along the circumferential direction of the stent. Background technique [0002] At present, stenting, as the main way to treat vascular stenosis, is accepted by more and more doctors and patients. Vascular stent, as a tiny tube network-shaped structure, is placed into the stenotic segment of the blood vessel to expand and support the lesion. During the expansion process, the vascular stent expands the narrow lumen by squeezing and stretching the plaque on the artery wall, thereby reducing the degree of stenosis of the blood vessel and ensuring the blood flow of the blood vessel. After the expansion is completed, the vascular stent expands to the maximum displacement and undergoe...

AI Technical Summary

Problems solved by technology

[0003] In recent years, degradable material vascular stents have attracted more and more attention. However, compared with stainless steel materials and cobalt-chromium alloys, the mechanical properties such as stiffness of degradable materials are obviously insufficient, and they are degradable. The support performance is seriously insufficient during the dynamic service process, so there is still a certain distance from clinical application of degradable stents

In addition, clinically, vascular plaques are divided into central plaques and eccentric plaques. For the treatment of eccentric plaques, the uneven expansion of the stent often leads to large residual stenosis after expansion, large dog-bone effect, and severe Affect the clinical treatment effect of stent

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