Electrosurgical system employing multiple electrodes and method thereof

Abstract From the Canadian patent

A system and method for heat ablation of tissue in which energy is sequentially applied to at least two electrodes inserted into tissue. The system is comprised of a radiofrequency (RF) source for supplying RF energy at least two electrodes configured to apply RF energy to tissue at least one return electrode for returning the RF energy to the RF source and a controller configured to sequentially apply the RF energy to each of the at least two electrodes. The sequential delivery of energy is determined by the measured current and voltage the calculated impedance at each of the electrodes and the timing for each electrode. An internal load may be activated with the previously activated …