vena cava filter

Abstract

The invention provides a vena cava filter which comprises a columnar net barrel. Shape memory wire threads are woven to form the columnar net barrel, a filter structure which is use for filtering thrombi is arranged in the net barrel and comprises a plurality of rod-shaped filter components, one end of each filter component is connected with the inner wall of the net barrel, and the other end of each filter component is connected with a connector. The filter components are perpendicular to the axis of the net barrel and are pressure springs. The vena cava filter has the advantages that the vena cava filter is of a net barrel structure, nickel-titanium alloy wires are woven to form the net barrel, accordingly, the vena cava filter is excellent in blood vessel adherence, and severe complications due to the fact that the vena cava filter moves and falls off to the hearts and the lungs of human bodies and is broken, vena cava is perforated and the like can be prevented; the vena cava filter can be recycled and can be conveniently implanted into the human bodies and taken out of the human bodies via the connectors; the vena cava filter which is of the net barrel structure can deform, is adaptive to the shapes of the blood vessels of the human bodies, and can be contracted when implanted into the human bodies and taken out of the human bodies, so that the vena cava filter with a small diameter can be arranged in a conveyor device.

Description

technical field [0001] The invention relates to a medical device, in particular to a vena cava filter. Background technique [0002] Pulmonary embolism is an acute disease with high clinical morbidity and mortality, the most common of which is caused by pulmonary thromboembolism. According to incomplete statistics, there are currently 355,000 patients with pulmonary embolism in China. [0003] The vena cava filter is a vascular filtering structure placed in the vena cava to capture thrombus, which can prevent thrombus from moving up to the heart and lungs, and effectively prevent pulmonary embolism. A vena cava filter may be used in patients with contraindications to anticoagulation and acute pulmonary embolism or acute proximal (above the knee) deep vein thrombosis. With the development of clinical technology and manufacturing technology, the performance and implantation method of vena cava filter have made great progress. [0004] The vena cava filter is a medical devic...

AI Technical Summary

Problems solved by technology

Although the above-mentioned patent can play the role of capturing thrombus, because it only uses a few metal wires as the fixing part, the rigidity of the overall structure is relatively large, the contraction performance is poor, and it is easy to shift and fall off, and because the ends of the metal wires It is in direct contact with the inner wall of the blood vessel, so it may cause a certain degree of damage to the inner wall of the blood vessel

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