Vein filter and recovery device thereof

By designing a catheter with a balloon and a venous filter recovery device, the problems of the venous filter being tilted and difficult to remove and the recovery operation being difficult are solved, thereby achieving the effect of simplifying the removal process and reducing the complexity of the operation.

CN120616841APending Publication Date: 2025-09-12SHANGHAI CITY JIADING DISTRICT CENT HOSPITAL
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Patent Information

Application Number
CN202511060505.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-30
Publication Date
2025-09-12

AI Technical Summary

Technical Problem

Existing venous filters are difficult to remove when tilted, and the retrieval operation is difficult, often requiring complex surgery or laparotomy, and the operation of hooking the snare into the retrieval hook requires high precision.

Method used

A venous filter and its retrieval device are designed, including a catheter with a balloon and a retrieval mechanism. The balloon is fixed to the venous filter after being expanded in the expansion and fixing cavity, and is connected to the central opening of the funnel through the catheter, simplifying the removal process.

Benefits of technology

It significantly reduces the probability of the venous filter being unable to be removed due to tilt, reduces the difficulty of the recovery operation, simplifies the doctor's operation, and avoids complicated surgery.

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Abstract

The invention provides a vein filter and a recovery device thereof, the vein filter comprises a recovery mechanism and a filtering mechanism, the filtering mechanism is composed of a plurality of filtering arms, the roots of the filtering arms are connected with the recovery mechanism, the recovery mechanism comprises a funnel part, a fixing part and a connecting part, and the funnel part, the fixing part and the connecting part are fixedly connected in sequence; a funnel cavity is formed in the funnel part, an expansion fixing cavity is formed in the fixing part, and a passing cavity is formed in the connecting part; the wide-opening end of the funnel cavity is communicated with the outside, the narrow-opening end of the funnel cavity is communicated with one end of the expansion fixing cavity, and the other end of the expansion fixing cavity is communicated with one end of the passing cavity; the maximum inner diameter of the expansion fixing cavity is larger than the inner diameter of the narrow opening end of the funnel cavity. The funnel type recovery mechanism is matched with the catheter provided with the balloon, so that the technical problems in the prior art that the filter is difficult to take out when inclining and the recovery operation is difficult are solved.
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