Novel retrievable vena cava thrombus multi-filtering device

Abstract

The invention provides a novel retrievable vena cava thrombus multi-filtering device. The multi-filtering device is composed of a retrieve hook, a connecting internal nut, a forked type filter screen, blood vessel fixing stabs, a sine wave filter screen, a tail end and a tail end connecting nut. The structure of the multi-filtering device is formed through integrated cutting processing and welding by adopting laser. The product is in a double-saucer-shaped structure, so that the contact area of the product and the vascular wall is obviously reduced, the intimal hyperplasia area of the vascular wall is greatly reduced, and when the multi-filtering device is retrieved, the damage to the vascular venous wall is obviously reduced, thus the retrievable time of the product in the human body is obviously prolonged. The double-saucer structure of the product is provided with four filtering screens, so that the thrombus filtering times can be increased, the thrombus filtering efficiency can be improved, while the thrombus is filtered, the passing of the blood is not blocked, therefore, the relapse risk of pulmonary embolism and the risk of the vein occlusion after the patient is treated by adopting the thrombus filtering device is greatly reduced.

Description

technical field [0001] The invention relates to a medical device, in particular to a recyclable vena cava thrombus filter which can filter floating thrombus in the vena cava system and prevent pulmonary embolism and pulmonary infarction. Background technique [0002] According to the analysis, 95% of the emboli in patients with pulmonary embolism and pulmonary infarction come from the shedding of the deep veins of the lower extremities and pelvic venous thrombus. The main way to remove the venous thrombus is to insert a venous thrombus filter through interventional operation to remove the floating thrombus in the patient's blood vessels. . At present, many manufacturers have developed different thrombus filtering devices in the market, which are used for limb trauma and fractures, especially vascular intima injuries; trauma; malignant tumors; neurosurgery; pregnancy complicated with deep vein thrombosis; venous thrombosis formed by long-term bedridden patients . [0003] W...

AI Technical Summary

Problems solved by technology

The better products on the market are better fixed in the blood vessel with multiple cross-bar segments in contact with the blood vessel wall. The product has a large contact area with the blood vessel wall. After implantation, the hyperplasia area of ​​the vascular intimal is too large. The blood vessel wall is severely damaged, resulting in a very short recovery time of the product in the patient's body

In addition, thrombus filtration efficiency is insufficient, and postoperative pulmonary embolism is frequently reported in patients

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