Patent ID: 7060065

Claim:
A resectscope apparatus, comprising: two electrodes adapted to be provided in a conductive or insulating solution within a body cavity; and a high frequency power supply device having a load characteristic, including: a power supply for supplying high frequency current to a living tissue to resect and coagulate the living tissue; and a control unit for controlling the load characteristic to discharge the high frequency current to the living tissue from at least one of the two electrodes, the control unit having a first control circuit which, in the case where the solution is conducive, performs controlling of the load characteristic in correspondence with a resistance value of the conductive solution so as to vaporize the conductive solution in the vicinity of a peripheral surface of at least one of the two electrodes in order to change the resistance value between the two electrodes, a second control circuit which, in the case where the solution is insulating, performs controlling of the load characteristic in correspondence with a resistance value of the insulating solution in order to change the resistance value between the two electrodes, and a switching control portion for selectively switching activations of the first and second control circuits depending upon whether the solution is conductive or insulating.