Ablation electrode capable of stable bending

By setting up a multi-segment sub-tube and thermal expansion parts in the movable bend section of the ablation electrode catheter, the expansion effect of the thermal expansion parts is used to limit the activity of the sub-tube, and the problem of insufficient bending flexibility and stability of the existing ablation electrode during surgery is solved, and the stability of the end of the ablation electrode and the efficiency of the ablation surgery are improved.

CN118845197BActive Publication Date: 2025-03-28NANJING FIRST HOSPITAL
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Patent Information

Application Number
CN202410900982.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-05
Publication Date
2025-03-28
Estimated Expiration
2044-07-05

AI Technical Summary

Technical Problem

The existing bendable ablation electrode cannot meet the needs of flexibility and stability of the end of the electrode during the surgery, resulting in difficulty in surgical manipulation and inaccurate ablation position.

Method used

A stable bending ablation electrode is designed. By setting multiple relative positions of the movable sub-tubes in the movable bent section of the ablation catheter and reserved a movable space between the sub-tubes. Using flexible thermal expansion parts and thermal conductors, the thermal expansion parts expand after heating, extruding the movable space between the sub-tubes, thereby limiting the activity margin of the sub-tubes and maintaining the stable bending direction and angle of the electrode end.

Benefits of technology

By gradually reducing the bending flexibility of the ablation electrode tip, the stability of the electrode tip position is improved, the safety and efficiency of the ablation surgery are improved, and the problem of inaccurate ablation position is avoided.

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Abstract

The present invention discloses a stably bendable ablation electrode, comprising an ablation catheter, an electrode assembly and a water pipe assembly. A section of the ablation catheter near the electrode end is connected by a plurality of relatively movable sub-tubes, and a movable space is reserved between two adjacent sections of the sub-tubes; a flexible heat expansion component is arranged inside the movable space or at its edge; the water pipe assembly comprises a water injection pipe and a water return pipe, and a heat conductive component is arranged between the water return pipe and the heat expansion component; wherein, when the heat expansion component expands due to heat, the volume occupied by the heat expansion component in the movable space increases. The above technical scheme utilizes the heat generated when the plasma ablation electrode ablates the lesion site to cause the volume of the heat expansion component to expand. As the ablation operation proceeds, the heat expansion component gradually occupies the movable space between adjacent sub-tubes, limiting the movable margin between adjacent sub-tubes, which is beneficial to improving the stability of the position of the ablation electrode tip during the operation.
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