Patent ID: 8663215
Filing Date: 2014-03-04
Classification: A61B

Abstract:
1. A method for controlling an electrosurgical apparatus for joining biological tissues, the method comprising: a detection portion detecting a voltage and a current of a high frequency power that is output from a high frequency power supply portion for supplying the high frequency power to be applied to the biological tissues; an impedance calculating portion calculating an impedance value between a pair of electrodes to which the high frequency power is applied and which grasps the biological tissues, based on respective values of the voltage and the current that are detected; and a control portion controlling so as to stop supply of the high frequency power and output a predetermined voltage (Vd) for monitoring a state of the biological tissues for a predetermined time (tm) when there is an increase that is equal to or greater than a predetermined value in the impedance value calculated by the impedance calculating portion after starting supply of the high frequency power, and if the impedance value calculated by the impedance calculating portion at an end of the predetermined time (tm) is equal to or greater than a first threshold value (Zth if the impedance value calculated by the impedance calculating portion at the end of the predetermined time (tm) is less than the first threshold value (Zth