Curved intravascular stent

Abstract

The invention discloses a curved intravascular stent. The curved intravascular stent comprises a rigid structure, a transition structure, a flexible structure and a sealing structure which are connected in sequence, and the joints are connected by adopting connection bridge structures respectively; the rigid structure adopts a straight-pipe-shaped structure; the transition structure, the flexiblestructure and the sealing structure all adopt a tubular structure; the transition structure, the flexible structure and the sealing structure are pre-bent at a same bending angle to form a bent structure, and the radius of the curvature is not zero. According to the curved intravascular stent, by involving the intravascular stent in a pre-bent form and combining the addition of diameter-varying design in an own multi-section structure, the curved intravascular stent can better adapt to curved characteristics and wall adherence properties of blood vessels, and in-stent restenosis caused by postoperative vascular stimulation is reduced.

Description

technical field [0001] The present application relates to the technical field of medical devices, in particular to a curved vascular stent. Background technique [0002] Iliac vein compression syndrome is a disorder of lower extremity and pelvic venous reflux caused by iliac vein compression and / or abnormal adhesion structures in the cavity. In human anatomy, the common iliac vein is usually compressed by the rear lumbosacral vertebrae and the right common iliac artery synchronously, resulting in venous reflux disorder and venous hypertension of the lower extremities. It is called non-thrombotic iliac vein compression syndrome, and deep venous thrombosis of the lower extremities is a relatively common venous disease in clinical practice. The clinical manifestations in the acute phase are swelling and pain in the lower extremities, and fatal pulmonary embolism caused by thrombus shedding; the clinical manifestations in the chronic phase are Manifested as obvious limb swellin...

AI Technical Summary

Problems solved by technology

[0004] The main problems in the clinical use of the existing traditional stent design: the anatomical structure shows that the diameter of the iliac-femoral vein is a gradual process, and there are different degrees of bending, the traditional design of the stent without diameter reduction and the stent pre-bending structure, easy to produce stents and Poor vascular fit or excessive stent interference

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