Left iliac total vein extravascular stent and operation method

By implanting a silicone rubber stent for the left common iliac vein outside the blood vessel, the problems of displacement, restenosis, and material fatigue associated with internal stents have been solved. This approach achieves close fit to the blood vessel and long-term patency, thus improving the treatment outcome of the iliac vein.

CN121465780AActive Publication Date: 2026-02-06KANGPU JISHI (SHAANXI) HEALTH & LIFE TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511999160.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-29
Publication Date
2026-02-06
Estimated Expiration
2045-12-29

AI Technical Summary

Technical Problem

Existing built-in iliac vein stents have problems such as stent migration, restenosis, intimal hyperplasia, material fatigue and poor biocompatibility, making them difficult to adapt to the complex anatomical structure of the iliac vein and difficult to operate.

Method used

The procedure employs an extravascular implantation method, using a stent made of silicone rubber for the left common iliac vein. The stent is designed as a one-piece structure, with the mid-segment connecting the stent forming a 135°~145° angle with the inferior vena cava stent and the left iliac vein stent. It is equipped with an elastic limiting clamp and is precisely implanted through minimally invasive surgery to ensure a tight fit between the stent and the outer wall of the blood vessel.

Benefits of technology

It significantly reduces the risk of intimal hyperplasia and thrombosis, improves anti-fatigue performance, reduces hemodynamic disturbances, enhances the compatibility of stents with blood vessels, reduces operational difficulty and the risk of complications, and improves long-term patency and safety.

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Abstract

The invention discloses a left iliac total vein extravascular stent and an operation method, and belongs to the field of medical instruments. The stent comprises a middle section connecting sleeve frame, an inferior vena cava sleeve frame and a left iliac vein sleeve frame which are integrally formed, the included angle between the three is 135-145 degrees, an elastic silica gel limiting clamping belt is arranged and made of a silicon rubber material, and the crosslinking density and flexibility are regulated and controlled by adjusting the vinyl content. The surgical method comprises the following steps of: minimally invasive laparoscopic approach, implanting a stent after exposing a target blood vessel, and adjusting the position. Direct contact between the built-in stent and the intima is avoided, the intima hyperplasia and thrombus risks are reduced, fatigue resistance and creep resistance are achieved, the stent is attached to the anatomical structure, fixation is stable, minimally invasive recovery is fast, customizable adaptation can be achieved, and the clinical treatment effect and safety are improved.
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