Plasma electrodes, impedance measurement signal injection methods, and tumor edge recognition methods

By integrating a wideband impedance sensing plasma electrode and a multi-frequency sinusoidal excitation signal injection method, the real-time and accuracy problems of impedance testing in traditional plasma surgery are solved, enabling rapid identification and precise resection of tumor margins.

CN122350855APending Publication Date: 2026-07-10HANGZHOU GONGSHU DISTRICT HOLOGRAPHIC INTELLIGENT TECHNOLOGY RESEARCH INSTITUTE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU GONGSHU DISTRICT HOLOGRAPHIC INTELLIGENT TECHNOLOGY RESEARCH INSTITUTE
Filing Date
2026-06-09
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In traditional plasma surgery, impedance testing makes it difficult to collect local tissue electrical property data in real time and in situ, which makes it difficult to identify the boundary between tumor and normal tissue and easily leads to residual or excessive damage.

Method used

A plasma electrode integrating broadband impedance sensing was designed. A four-electrode measurement method and a multi-frequency sinusoidal excitation signal injection method were used, combined with a genetic algorithm to optimize phase and distributed relaxation time analysis, to achieve rapid identification of tumor margins.

Benefits of technology

This achieves deep integration of ablation and impedance measurement, improving measurement accuracy and recognition speed, and ensuring the precision and safety of the surgery.

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Abstract

This invention discloses a plasma electrode, an impedance measurement signal injection method, and a tumor edge recognition method, relating to the fields of electrosurgical instruments and biological tissue detection technology. To address the problems of traditional plasma surgery's inability to acquire tissue electrical properties in real-time and in situ, and its difficulty in accurately identifying tumor edges, this invention integrates two pairs of miniature measurement electrodes into the active electrode, with a ceramic-insulated microchannel on the back side; it uses multi-frequency signals superimposed at logarithmic frequency points of 1kHz to 5MHz, and injects them in parallel within 10ms after phase optimization using a genetic algorithm; it extracts the Cole relaxation frequency based on distributed relaxation time, and achieves rapid tumor edge recognition through offline pre-calculation and online processing. This invention achieves deep integration of ablation and sensing, enabling early determination of tissue type and improving the accuracy and safety of tumor resection.
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