filter device

Abstract

The invention provides a filtering device. The filtering device includes a net tubular support structure ad at least one internal filtering structure connected to the support structure; each internal filtering structure and the support structure at least partly overlap in the axial direction; each internal filtering structure includes a plurality of support rods; and first ends of all the support rods are connected together, and second ends of the all the support rods are connected to the support structure. Each internal filtering structure and the support structure at least partly overlap in the axial direction, and then the length of the filtering device is shortened in the axial direction, influence on dual side renal vein and iliac vein blood return due to a too long filtering structure can be avoided, and the efficiency of thrombus capturing can be improved; and meantime, the support structure is net tubular and adopts an appropriate specification, and provide strong support force for the internal filtering structures, and then eccentric tops of the internal filtering structure can be avoided, the accuracy of the filtering device can be improved after the filtering device is released, and the efficiency of thrombus capturing can be further improved.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a filter device. Background technique [0002] According to the survey, the number of patients who die of pulmonary embolism (Pulmonary Embolism, PE) in the United States is 10,000 to 30,000 every year, which exceeds the sum of deaths from breast cancer and AIDS, and is the third largest disease in the United States. Based on this, the American Association of Orthopedic Surgeons proposed that preventive treatment measures for pulmonary embolism should be taken in patients before surgery. Usually, preventive treatment measures for pulmonary embolism include the use of chemical drugs such as aspirin, low-molecular-weight heparin, and warfarin, mechanical rehabilitation preventive devices, or implanted filters. The above-mentioned treatment methods have achieved obvious effects in the preventive treatment of pulmonary embolism, but there are still some significant probl...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a filter device to solve the problem that the existing filter device is implanted into the human body, which affects the blood return of the iliac artery and the renal artery due to the excessive length, resulting in the generation of large thrombus or the occlusion of the renal artery, and the problem that the filter device is easy to Eccentricity occurs, resulting in a decrease in the efficiency of capturing thrombus and the impossibility of secondary recovery of the filter

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