Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (9): 1635-1638.doi: 10.3969/j.issn.1673-8225.2011.09.028

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Control mode of a new gas-cooled controlled radio frequency ablation system

Wang Yu-kai, Gu Xue-lian, Chang Zhao-hua, Zhao Qing-xiao   

  1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai  200093, China
  • Received:2010-11-19 Revised:2011-01-14 Online:2011-02-26 Published:2011-02-26
  • About author:Wang Yu-kai★, Studying for master’s degree, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China hfwyk@126.com
  • Supported by:

    the Shanghai Alliance Plan, No. LM0914*

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Abstract:

BACKGROUND: Radio frequency ablation (RFA) has widely utilized in the treatment for tumor with minimally invasion. However, the current RFA has disadvantages of little volume of coagulation.
OBJECTIVE: To design a new gas-cooled RFA controlled mode to increase the extent of coagulation.
METHODS: A new gas-cooled RFA controlled mode was researched based on existing gas-cooled RFA system and characteristics of gas-cooled electrode. That is, the new mode was by freeing power of gas-cooled to control the range of RFA under temperature-controlled. The control system adopted master machine and slave machine architecture, and the temperature controlling used improved PID control algorithm.
RESULTS AND CONCLUSION: The temperature control results showed that improved PID control algorithm could control temperature precisely, with a fast reaction velocity. Gas-cooled radio frequency power and cooling power showed that, freeing power of gas-cooled can better regulate the output power of RFA to achieve aim of controlling RFA range.

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