Degradable vena caval filter

Abstract

The invention discloses a degradable vena caval filter which comprises a stereo filter rack in a funnel shape. A plurality of connected frames are rotationally arranged on the filter rack. Each frame comprises an inner side frame and an outer side frame which extend obliquely in the axial direction of the filter rack and are connected, wherein the end, extending to the center of the filter rack, of the inner side frame is a pointed end of the filter rack. An annular frame connected with the inner side frames is arranged on the frames and at the pointed ends of the filter rack. The end, obliquely extending outwards, of each outer side frame is an outer end of the filter rack. The inner side frames, the outer side frames and the annular frame are made of a degradable material, and the thickness of the inner side frames and the thickness of the annular frame are smaller than or equal to the thickness of the outer side frames. The degradable vena caval filter can well stably fasten blood vessels to achieve expansion and supporting, the structure of the filter is easy to fold, the filter can be conveniently implanted in a human body through operation, the blood vessels can be stably fastened, blood clots are effectively filtered away, finally the filter is degraded step by step over time, no residual foreign bodies are generated, patient treatment is helped to the largest extent, and medical value is very high.

Description

technical field [0001] The invention relates to a medical device, in particular to a degradable vena cava filter. Background technique [0002] Venous thromboembolism (VTE), including deep vein thrombosis (DVT) and pulmonary embolism (PE), is an extremely common disease worldwide, seriously affecting the quality of life of patients, and even causing death. According to statistics, the incidence rate of VTE in the general population is 1-3 / 1000, and the occurrence of VTE worldwide is close to 10 million cases per year. The number of VTE cases in the United States exceeds 900,000 per year, and one-third of them directly lead to death, accounting for the third cause of death. bit. DVT mostly occurs in lower extremities. Due to the obstruction of blood return, lower extremity swelling, pain, and dysfunction occur. However, if the thrombus falls off and flows back to the pulmonary artery through the right heart, it can lead to serious complications—PE. Since 1960, the inferior ...

AI Technical Summary

Problems solved by technology

At present, my country still lacks accurate epidemiological data of VTE, but with the continuous improvement of clinicians' awareness and level of diagnosis and the aging of society, the number of cases of PE and DVT diagnosis and treatment in China is increasing year by year.

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