Tube and wire combined vena cava filter

Abstract

The invention relates to a tube and wire combined vena cava filter, which comprises a guide tube and at least three guide wires. The guide wires all arranged in the guide tube and penetrate the guide tube; first ends of the guide wires extend out from the front end of the guide tube and woven fixedly to form a network structure; second ends, opposite to the first ends, of the at least three guide wires are provided with recovery hooks; the recovery hooks extend out from the rear end of the guide tube, and the recovery hooks face outwards and are uniformly distributed on the periphery of the guide tube. The guide wires are woven into the network structure for filtering large thrombi, and auxiliary filter and protection of the guide wires are realized by virtue of the guide tube, so that the large thrombi can be filtered effectively to prevent pulmonary embolism while structural stability, high strength, low cost and simplicity in manufacturing are realized. In addition, due to the three recovery hook structures, one of the recovery hooks is always not close to the blood vessel wall no matter what position and posture of the vena cava filter are in the vena cava, and accordingly the recovery hooks can be conveniently caught by a catching ring, and convenience in recovery of the whole filter is achieved.

Description

technical field [0001] The invention relates to the field of vena cava filter, in particular to a filter of vena cava combined with tube wire. Background technique [0002] Deep venous thrombosis of the lower extremities is a common clinical disease and the main cause of pulmonary embolism. Pulmonary embolism has a high mortality and disability rate. The insertion of the vena cava filter is a percutaneous puncture method. A metal filter is placed in the inferior vena cava through a catheter feeder. The filter can prevent large thrombus from ascending, prevent the occurrence of fatal pulmonary embolism or reduce the occurrence of pulmonary embolism. Compared with traditional surgery, percutaneous subcaval filter placement is simple, safe and effective, and has been widely used in recent years. The current inferior vena cava filter is mostly made of medical titanium alloy tubes through laser engraving; the existing problem is that either the strength is poor, and it is prone...

AI Technical Summary

Problems solved by technology

The current inferior vena cava filter is mostly made of medical titanium alloy tubes through laser engraving; the existing problem is that either the strength is poor, and it is prone to breakage, which affects safety; or although the strength is good, the cost is high and the processing technology requirements are also high.

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