filter

Abstract

The invention discloses a filter, which includes a filter body and at least one recovery body, the filter body includes a filter part and at least one end connected to the filter part, and the recovery body includes a plurality of spaced apart recovery hooks; each recovery hook is It is connected with the end portion and extends radially outward from the end portion toward the filter portion. The filter of the present invention includes a plurality of recovery hooks spaced apart from each other. Even if the filter is tilted so that the blood vessel wall covers one of the recovery hooks, other recovery hooks are still exposed in the lumen, which does not affect the capture device to catch the recovery hook. Recycle filter. If the filter is not tilted, multiple recovery hooks arranged at intervals increase the probability of the capture device entrapping the recovery hooks. As long as the capture device entangles any one of them, the filter can be recovered. Therefore, the above-mentioned recovery body setting is adopted. It can reduce the operating time of the filter recovery operation, reduce the difficulty of the operation, and thereby reduce the intraoperative risk of the patient.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a filter. Background technique [0002] Pulmonary embolism is a common disease with a high fatality rate. According to statistics, the mortality rate of untreated pulmonary embolism is 20%-30%; new cases each year account for about 0.2% of the total population, calculated on the basis of my country's 1.35 billion population , about 2.7 million new patients each year. The vena cava filter (hereinafter referred to as the filter) has been clinically proven to reduce the incidence of pulmonary embolism. Filters are divided into permanent implant filters and temporary filters. If the implant position is improper or the filter is tilted when implanted in the body, it is necessary to use a catcher to recover the filter and then release it again. For temporary filters, after implanting in the patient for a period of time, after the risk of pulmonary embolism decreases or disappears, t...

AI Technical Summary

Problems solved by technology

However, limited by the size of the end portion 21, and in order to ensure that the beveled opening 211 does not break during the pulling process, usually only one beveled opening 211 can be provided at the end portion 21

If filter 2 occurs due to factors such as unstable anchoring or vascular biodynamics during implantation, such as figure 1 As shown, the end 21 will be in contact with the blood vessel 31, and the above-mentioned oblique opening 211 will be blocked by the blood vessel wall 32, making it difficult for the capture device to be inserted into the oblique opening 211, thus increasing the difficulty of the operation and prolonging the operation time , and increased surgical risk

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