Swirling vena cava filter

Abstract

The invention relates to a vena cava filer with a swirling guider, and belongs to the field of medical equipment. The invention aims to solve a problem of thrombus blockage after the traditional filter is implemented in the vena cava. The swirling vena cava filter is composed of two parts, namely a swirling guider part and a conventional umbrella-shaped filter screen, and the two parts are combined into an integral whole. The swirling vena cava filter is characterized in that the spiral distance in a spiral structure which is from small to big along the opening direction of the filter screen ranges from 5 to 20 millimeters, and the section of a spiral metal wire takes the shape of a circle with the diameter being less than 2 millimeters. The swirling guider of the filter has the function of enabling blood stream to move rotatably, and can increase the flowing shear stress and better scour the filter screen at the same time, thereby achieving the purpose of preventing or alleviating thrombus blockage, and having important clinical application values.

Description

technical field [0001] The invention relates to a vena cava filter, in particular to a vena cava filter that guides blood to rotate and flow forward, and belongs to the field of medical devices. Background technique [0002] The inferior vena cava filter is an interventional device used to prevent the thrombus formed in the deep vein of the patient's lower extremity from flowing into the heart. After an inferior vena cava device is implanted, blood clots often block the filter, forcing the doctor to remove the filter and replace it with a new one. At present, the vena cava filter has been developed to the second generation. Although the second-generation vena cava filter can be sent into the human body with a catheter, it can be taken out from the human body with a catheter, but the thrombus blockage after the vena cava filter is implanted has not been resolved. The study found that the human aortic arch is in a three-dimensional spiral shape, and it is this spiral structu...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention proposes a vena cava filter that guides the blood flow to rotate and flow forward, the purpose of which is to make the blood flow in the vena cava swirl, thereby helping to prevent the accumulation of thrombus in the vena cava filter And self-dissolution, dredging the flow of blood in the filter, so as to solve the problem of thrombus blockage of the vena cava filter

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