Novel inferior vena cava filter

Abstract

The invention provides a novel inferior vena cava filter. The novel inferior vena cava filter comprises a main body bracket, wherein the main body bracket consists of a plurality of rod shaped structures; one ends of the rod shaped structures are fixed to one point to form a sharp end, and the other ends of the rod shaped structures are in radial distribution; a plurality of ring shaped filteringwire rings are arranged on the main body bracket; the annular plane of each filtering wire ring is perpendicular to the center line of the main body bracket; the sections of the filtering wire rings are elliptical cross sections; and an included angle between the major axis of the elliptical cross section of each filtering wire ring and the center line above the filtering wire rings is 50-110 degrees. The novel inferior vena cava filter disclosed by the invention has the advantage of being not liable to block, and can catch thrombosis of which the volume is smaller than the gap of the filtering wires; and compared with a conventional filter, the novel inferior vena cava filter has preferable filtration effects.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to an inferior vena cava filter, in particular to a novel inferior vena cava filter. 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 inferior vena cava filter is an implanted interventional device used to prevent the thrombus formed in the deep vein of the patient's lower limbs from flowing into the heart or lungs. Since 1960, the inferior vena cava filter has been widely used clinically. Studies have shown that the inferior vena cava filter can significantly reduce the incidence of short-term and long-term PE. The inferior vena cava filter can be divided into conical, cylindrical, spiral and so on in terms of shape. Among them, the conical filter is the most widely used clinically and has a high degree of acceptance. Most of the inferio...

AI Technical Summary

Problems solved by technology

[0004] This application solves the problem that the inferior vena cava filter in the prior art is easy to cause re-occlusion after being implanted in the human body, and the problem that the fixed structure between the filter and the blood vessel wall is easy to cause failure and complications, and then provides a device that can New inferior vena cava filter with a new fixed structure to reduce the incidence of clogging

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