A microcatheter with a balloon at the distal end

By setting a partition rod inside the connecting channel of the microcatheter to control the expansion of its distal end to separate the balloon and the connecting channel, the problems of difficulty in retraction of the balloon and reduced adaptability in the prior art are solved, and efficient retraction and diversified expansion effects of the balloon are achieved.

CN118079200BActive Publication Date: 2025-03-25XUZHOU XIUWEI MEDICAL TECH CO LTD
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Patent Information

Application Number
CN202410204950.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-02-26
Publication Date
2025-03-25
Estimated Expiration
2044-02-26

AI Technical Summary

Technical Problem

The existing microcatheter balloons are blocked in filling channels or high viscosity of the developer, which leads to difficulty in balloon retraction, while the U-shaped communication design leads to reduced balloon adaptability.

Method used

A plurality of partition rods are arranged inside the connecting channel of the microcatheter. By controlling the expansion of the distal end of the partition rod, the balloon and the connecting channel are separated, forming multiple independent cavitys, thereby achieving different radial expansion of the balloon and improving applicability.

Benefits of technology

Through the control of the partition rod, the balloon is guaranteed to retract and improve the adaptability of the balloon, so that it can expand radially at different positions, which is suitable for more situations.

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Abstract

The present invention discloses a microcatheter with a balloon at the distal end, which belongs to the technical field of microcatheters and comprises a microcatheter body, wherein a tube seat is installed at the proximal end of the microcatheter body, a developing mark is installed at the distal end, and a hydrophilic coating is provided on the outer side of the microcatheter body. The microcatheter body comprises an inner tube and an outer tube, wherein a balloon is installed at the distal end of the outer tube, and a plurality of branch tubes are installed at the proximal end. The balloon is communicated with the plurality of branch tubes through a connecting channel formed between the inner tube and the outer tube, and a plurality of partition rods corresponding to the branch tubes are arranged inside the connecting channel. The distal end of the partition rod can be controlled to expand. When the distal end of the partition rod expands, the balloon and the connecting channel are separated into a plurality of independent cavities, and after the separation, the plurality of branch tubes are respectively communicated with the corresponding independent cavities. When the distal end of the partition rod contracts, the balloon and the connecting channel form a cavity, and a plurality of through holes which can be controlled to open and close and are used to assist the contraction of the balloon are arranged on the partition rod.
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