Transarticular vascular stent and method of making same

By using segmented design and electrospinning technology to fabricate cross-articular vascular stents, the problem of insufficient adaptability of existing stents in the lower limb arterial region has been solved. This has enabled the stent to achieve compliance and fatigue resistance under complex mechanical deformation, reducing restenosis and fracture.

CN121015356BActive Publication Date: 2026-02-13POLYREY MEDICAL TECH SUZHOU CO LTD
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Patent Information

Application Number
CN202511576723.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-10-31
Publication Date
2026-02-13
Estimated Expiration
2045-10-31

AI Technical Summary

Technical Problem

Existing stent designs cannot take into account the differentiated needs of different regions of the lower limb arteries, making them prone to restenosis or breakage under mechanical deformation in the FPA region. Existing stents cannot simultaneously maintain compliance and fatigue resistance under axial compression, torsion and bending.

Method used

The stent adopts a transarticular vascular design, comprising a first part and a second part. The first part consists of multiple first stent rings and a covering membrane, and the second part consists of multiple second stent rings and a connecting membrane. The covering membrane and connecting membrane are prepared by electrospinning technology. The stent rings are made of absorbable materials and coated with sustained-release drugs. The design of the stent rings and connecting membranes is adapted to the mechanical deformation of different regions.

Benefits of technology

It effectively avoids stent breakage and restenosis, reduces the probability of secondary surgery, maintains vascular patency, adapts to the complex mechanical deformation of lower limb arteries, and reduces mechanical stress stimulation on the arterial wall.

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Abstract

The present application relates to a kind of transarticular vascular stents and its preparation method, transarticular vascular stent includes the first part and second part distributed along the axial direction of transarticular vascular stent;First part includes multiple first stent rings spaced apart along the axial direction of transarticular vascular stent and independent of each other and the whole surface film fixedly arranged on multiple first stent rings;Wherein, from proximal end to distal end, the distance between adjacent two first stent rings gradually increases;Second part includes multiple second stent rings spaced apart along the axial direction of transarticular vascular stent and independent of each other and multiple rows of connecting film groups sequentially arranged along the axial direction of transarticular vascular stent;Each row of connecting film groups includes multiple connecting membranes uniformly distributed along the circumferential direction of transarticular vascular stent, and both ends of each connecting membrane are respectively fixedly connected with adjacent two second stent rings;The width of the rod forming first stent ring is greater than the width of the rod forming second stent ring.
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