Venous stent with high flexibility

By designing asymmetric venous stents, combined with the structural characteristics of proximal stents, strong radial support stents and distal braided stents, the existing venous stents have solved the problems of uneven pressure resistance and insufficient flexibility in the treatment of iliofemoral vein stenosis occlusion diseases, and better stent fixation and treatment effects have been achieved.

CN120093482APending Publication Date: 2025-06-06SHANGHAI NINTH PEOPLES HOSPITAL SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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Patent Information

Application Number
CN202510460192.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-14
Publication Date
2025-06-06

AI Technical Summary

Technical Problem

The existing venous stents have problems such as uneven anti-pressure, insufficient flexibility, easy angle formation and stent displacement in the treatment of iliofemoral venous stenosis occlusion diseases, which affect the treatment effect and the quality of life of patients.

Method used

An asymmetric venous stent, including proximal stents, strong radial support stents and distal braided stents, adapting to the needs of different segments through different structural and mechanical characteristics, ensuring that the stent does not affect blood flow at the confluence of the double iliac vein, providing strong radial support at the proximal iliac vein, high flexibility across the joint segments, and increasing friction in the distal anchoring area.

Benefits of technology

This stent can better meet the treatment needs of patients with non-thrombotic iliofemoral venous stenosis occlusion diseases, ensure stent fixation and stable placement across joints, reduce damage to the endometrium, improve treatment effect and patient quality of life.

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Abstract

The invention relates to a vein stent with high flexibility, a far-end woven stent is formed by weaving metal wires with coatings and has high flexibility, and the expansion diameter of the stent is slightly larger than the diameter of a target vein but smaller than that of a near-end laser engraving stent; the far-end woven stent comprises a metal wire and a coating located outside the metal wire, the coating is divided into an inner side coating and an outer side coating, the radian proportion of the inner side coating is larger than that of the outer side coating, and the surface roughness of the inner side coating is smaller than that of the outer side coating; and the group of metal connecting short rods are connected with the near-end laser engraving bracket and the woven bracket through welding. The stent has different structure and mechanical characteristics in vein segments with different anatomy and kinematic mechanics characteristics, is better in targeted adaptability, and can better meet the requirements of stent fixation and cross-joint stent placement in iliofemoral vein stent implantation of patients with non-thrombotic iliofemoral vein stenosis occlusion diseases.
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