Radiofrequency ablation catheter and radiofrequency ablation device

By setting a central wire with an internal limiting part in the radiofrequency ablation catheter, the expansion and contraction of the electrode stent can be realized, which solves the problems of cumbersome operation and vascular damage in the prior art, and improves the accuracy of branch superselection and the efficiency of radiofrequency ablation.

WO2026114189A1PCT designated stage Publication Date: 2026-06-04SHANGHAI GOLDEN LEAF MED TEC CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SHANGHAI GOLDEN LEAF MED TEC CO LTD
Filing Date
2025-11-24
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing radiofrequency ablation catheters are cumbersome to operate when inserting and retrieving the center wire multiple times, have low branch superselection accuracy, and are prone to causing damage to blood vessels.

Method used

A radiofrequency ablation catheter is designed with a first limiting part and a second limiting part on the central wire, both of which are built into the first cavity. The expansion and contraction of the electrode stent are realized through the cooperation of the limiting parts. The distal end of the central wire has a small size, which reduces the risk of vascular injury and improves the superselection accuracy of branches.

Benefits of technology

The central wire offers greater controllability and smoother movement, reducing the risk of vascular injury and improving the efficiency of radiofrequency ablation and the precision of branch superselection.

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  • Figure CN2025137210_04062026_PF_FP_ABST
    Figure CN2025137210_04062026_PF_FP_ABST
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Abstract

A radiofrequency ablation catheter (100) and a radiofrequency ablation device. The radiofrequency ablation catheter (100) comprises a radially contractible and expandable electrode stent (20), a connecting tube (30), and a core wire (40). The proximal end of the connecting tube (30) is connected to the distal end of the electrode stent (20), and the connecting tube (30) has a first lumen (34) running through the proximal and distal ends thereof. The core wire (40) movably runs through the electrode stent (20) and the first lumen (34). The core wire (40) is provided with a first limiting portion (41), the first limiting portion (41) being located in the first lumen (34); and the inner wall of the first lumen (34) is correspondingly provided with a second limiting portion (35). When the first limiting portion (41) abuts against the second limiting portion (35) and the central wire (40) moves from the distal end to the proximal end, the electrode stent (20) is switched from a contracted state to an expanded state. The radiofrequency ablation catheter (100) can reduce the risk of vascular injury, improve the accuracy of the core wire (40) in accessing a target branch vessel, and thus improve the ablation efficiency of radiofrequency ablation.
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