Patent ID: 6872207

Claim:
A resectscope apparatus comprising: an electrode unit having one of a treating and return electrodes; a sheath for housing the electrode unit, the sheath having the other of the treating and return electrodes, the treating and return electrodes adapted to be provided in a conductive solution within a body cavity; high frequency current supply means for supplying high frequency current between the treating and return electrodes, in which the high frequency current is discharged from the treating electrode to a living tissue, and the living tissue is resected and is coagulated; comparing means for comparing resistance values around the treating and return electrodes with a predetermined threshold value, the predetermined threshold value being set higher than a resistance value in a condition that the treating and return electrodes are in a conductive liquid and lower than a resistance value in a condition that the treating and return electrodes are in an insulative liquid or in air; and control means for controlling an output of the high frequency current supply means to the treating electrode based on a comparison result by the comparing means.