Novel retrievable vena cava thrombus filter

Abstract

The invention discloses a novel retrievable vena cava thrombus filter. The product is composed of a retrieving hook, a connecting internal nut, front-end filter screens, blood vessel fixed thorns, balancing pillars, sine wave filter screens, a tail end and a tail end connecting nut. The filter structure is formed through integrated laser cutting processing and welding. The finished product disclosed by the invention, by virtue of the sine wave filter screens in positive S forms, can expand the filter part of the filter and improve the thrombus filter efficiency; the product, when used for filtering thrombus, can avoid occlusion in the passing ability of blood flow, so that the risks of pulmonary embolism reoccurrence and vein occlusion in a patient subjected to the treatment by virtue of the thrombus filter apparatus. The product, which is processed from same nickel-titanium alloy, can improve the corrosion potential thereof, relieve the corrosion thereof in blood, relieve the invasion of metal ions into a human body and promote the safe use thereof.

Description

technical field [0001] The patent of the present invention relates to a medical device for the cardiovascular system, in particular to a recyclable vena cava thrombus filter that can filter floating thrombus in the vena cava system and prevent pulmonary embolism and pulmonary infarction. Background technique [0002] According to reports, there are 300,000-500,000 hospitalized patients each year in the United States due to deep vein thrombosis and pulmonary infarction, of which 50,000 patients died of pulmonary infarction. According to the autopsy analysis of pulmonary infarction patients, 95% of the emboli come from the deep vein and pelvic vein thrombosis of the lower extremities. At present, different manufacturers in the market have also developed different thrombus filtering devices, which are used for limb trauma and fractures, especially vascular intima injuries; trauma; malignant tumors; neurosurgery; pregnancy complicated with deep vein thrombosis; and venous thromb...

AI Technical Summary

Problems solved by technology

However, the better products in the market are non-single metal products with low corrosion potential. After the product enters the human body, it is easily corroded in the human blood environment. The metal ions in the product will enter the human body and endanger the health of patients.

After the products on the market are implanted into the human body, in addition to being easy to corrode, the thrombus filtration efficiency is also insufficient, and there are often reports of pulmonary embolism in patients

Images