Design of cooling radiofrequency ablation instrument and its control algorithm
QIAN Ruiyan
GU Dandan
LIU Difang
YAO Haitao
MAO Lin
ZHOU Yu
Abstract：In order to extend the ablation range and effectively reduce the risk of tissue carbonization or gasification,we designed a cooling radiofrequency ablation instrument and control algorithm that can achieve ablation ranges greater than 3 cm in diameter and close to standard sphericity with only one ablation.Based on the in vitro beef liver,we compared the traditional constant-power radio-frequency ablation,cooling constant-power radiofrequency ablation,and algorithmically controlled cooling radiofrequency ablation.The results showed that the maximum deviation between the ellipticity index and the regularity index of radiofrequency ablation under control algorithm was the smallest,the maximum deviation of the ellipticity index and regularity index was 8%and 42%,respectively.The av-erage value of the elliptical index and the regular index was the closest to 1,which was 1.03 and 0.72,respectively.In addition,the variance of the elliptical index and the regular index was the smallest,which was 0.0023 and 0.0012,respectively.The self-made cooling radiofrequency ablation instrument could effectively reduce the electrode contact tissue temperature,and its control algorithm was more stable,spherical,and regular than that of traditional and cooling constant power ablation.This research is expected to have a positive impact on subsequent ablation therapy.
Keywords：Radiofrequency cooling ablationControl algorithmEllipticity indexRegularity indexIn vitro experiment
Publication Date：2023-12-25
Online Publishing Date：2026-09-11(First online date of this platform, not the publication date of the document)
Pages：9( 384-392 )