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[Cool-tip Radiofrequency Ablation Therapy Instrument Based on Impedance Control Algorithm]

Danping Zheng, Mingri Zhu, Wenbin Liu, Xin Yao, Kai Pan, Huibin Gong
Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi 2015, 32 (4): 905-9
A new cool-tip radiofrequency (RF) ablation therapeutic instrument based on impedance control algorithm is introduced in this paper. The equipment is composed of hardware system and software system. The RF power output and real time data acquisition are completed by the hardware system, while the software is used mainly to finish the control of the ablation range, the core of which is impedance control algorithm, and it also used to complete the display of the real time data in the course of the experiment. The impedance algorithm has solved the problem of impedance increased rapidly during the RF ablation, which has also expanded the scope of ablation. The pig liver experiments showed that the impedance control algorithm had strong adaptability. It also obtained a result of ablation range up to 3.5-4.5 cm single needle. It has the high clinical practical value of one-time inactivation of 3-5 cm tumor.


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