Recyclable vena cava filter

Abstract

The invention relates to a recyclable vena cava filter. The recyclable vena cava filter comprises a recycling column and a vena cava filter body with unfolded and folded states, wherein the vena cava filter body comprises a filtering rod assembly and a support frame; the filtering rod assembly comprises a plurality of first filtering rods and a plurality of second filtering rods; when the filter is unfolded, an included angle A formed by the first filtering rod and the central axis of the recycling column is greater than an included angle B formed by the second filtering rod and the central axis of the recycling column; the distance from the lower end part of the first filtering rod to the central axis of the recycling column is smaller than the distance from the lower end part of the second part to the central axis of the recycling column; the support frame comprises a plurality of support rod pieces which are evenly arranged around the central axis of the recycling column and are of a closed structure; and when the filter is unfolded, the located plane of each support rod piece is parallel to the central axis of the recycling column. The vena cava filter provided by the invention has high structural stability, good wall adherence, good anti-falling performance, high embolus capture rate and small influence on blood circulation.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to a recoverable vena cava filter. Background technique [0002] Deep vein thrombosis (DVT) refers to abnormal coagulation of blood in deep veins due to vessel wall damage, blood stasis, blood hypercoagulability, etc. Embolism (Pulmonary embolism, PE). Inferior vena cava filter (IVCF) is a device designed to prevent pulmonary embolism caused by emboli falling off in deep vein thrombosis of the lower extremities. It can effectively prevent fatal PE and is widely used in clinical practice. The inferior vena cava filter can capture large clots, and then dissolve or break down the large clots into smaller blood clots through catheter thrombolysis, and disperse them to the small branches of the pulmonary artery, reducing the impact of thrombus on the pulmonary circulation. [0003] At present, the types of filters can be divided into permanent, retrievable and con...

AI Technical Summary

Problems solved by technology

However, its contact with the blood vessel wall is limited, and its adherence, stability, and anti-shedding properties need to be further improved during use, and the structure of the part where it captures and filters thrombus is relatively complicated, which significantly disturbs the blood flow and easily causes hemolysis. Phenomenon

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