Protection film for implanting and releasing conical cavity vein filter

Abstract

The invention relates to a protection film for implanting and releasing a conical cavity vein filter, and belongs to the field of medical instruments. The protection film wraps one end of the filter close to a supporting leg, is made of degradable materials and has elasticity, the protection film can be unfolded along with unfolding of the filter when the filter is implanted and released, the protection film is thin, and the thickness of the protection film is smaller than 0.2 millimeter after the filter is unfolded. According to the protection film, force released by the filter is effectivelyrelieved in the unfolding process of the filter, so that damage of supporting leg hooked spines to blood vessel walls is reduced, fixing of the filter on the blood vessel walls cannot be affected asthe protection film is thin, the protection film is marked by an iodide compound, a degradation position of the protection film in a human body is easily traced by a medical image, a blood vessel injury resisting drug on the protection film helps to protect blood vessels, and complication of filter implantation is decreased. The protection film solves the problem that the blood vessels are damagedwhen the filter is unfolded and has important clinical application values.

Description

technical field [0001] The invention relates to a protective film, in particular to a protective film when a conical vena cava filter is implanted and released, and belongs to the technical field of medical devices. Background technique [0002] Venous thromboembolism (VTE), including deep vein thrombosis (DVT) and pulmonary embolism (PE), is a common disease worldwide with a high mortality rate. The vena cava filter is an interventional device used to prevent blood clots formed in the deep veins of the lower extremities from flowing into the heart. Since 1960, vena cava filter has been widely used clinically, studies have shown that vena cava filter can significantly reduce the incidence of short-term and long-term PE. The conical filter is a commonly used vena cava filter clinically, such as: Greenfield filter, Celect filter and Option filter are all conical vena cava filters. The conical vena cava filter is usually made of nickel-titanium shape memory alloy. When it is ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention proposes a protective film for the implantation and release of the conical vena cava filter, the purpose of which is to reduce the damage to the vessel wall caused by the barbs of the supporting legs during the release of the filter

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