Vena cava filter

Abstract

The invention discloses a vena cava filter. The vena cava filter comprises a recycling hanging hook and support pillars, wherein the support pillars are in two-layer structures and comprise upper support pillar parts and lower support pillar parts which are slantwise arranged along the circumferential direction of the recycling hanging hook; one ends of the upper support pillar parts are connected with the recycling hanging hook, the other ends of the upper support pillar parts are connected with the lower support pillar parts, namely, the upper support pillar parts and the lower support pillar parts are arranged at intervals along the axial direction of the recycling hanging hook, and the upper support pillar parts and lower support pillar parts are provided with connecting parts in point contact with the blood vessels. According to the vena cava filter, the support pillars are arranged in two layers, and the upper support pillar parts and the lower support pillar parts are in point contact with the blood vessels, therefore, the fixing stability is increased, under the blood flowing condition or under the effect of gravity, the probability that the vena cava filter inclines can be reduced, and thus the recycling difficulty can be reduced.

Description

technical field [0001] The invention relates to the technical field of medical instruments, and more specifically relates to a vena cava filter. Background technique [0002] Deep vein thrombosis (deep vein thrombosis, DVT) refers to abnormal coagulation of blood in deep veins due to vessel wall damage, blood stasis, blood hypercoagulability, etc. (pulmonary embolism, PE). For this kind of problem, percutaneous placement of inferior vena cava filter (IVCF) can effectively prevent fatal PE, and it is widely used and clinically. IVCF captures large clots that can cause blockage of the main pulmonary artery. Through blood washing and percutaneous catheter thrombus aspiration, catheter thrombolysis dissolves or converts large blood clots into small blood clots, and finally distributes them in the pulmonary artery. The small branches can minimize the impact of thrombus on the pulmonary circulation. [0003] For patients who need filter protection for a long time (especially th...

AI Technical Summary

Problems solved by technology

However, the existing retrievable vena cava filter with point-like anchors is prone to inclination due to blood flow and gravity after the human body is upright.

[0004] Therefore, how to provide a vena cava filter to reduce the problem that the vena cava filter is easy to tilt after being fixed is a technical problem that those skilled in the art need to solve at present.

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