Patent ID: 7001381

Claim:
An electric operation apparatus comprising: a high frequency electric current generating circuit that generates a high frequency electric current for feeding the high frequency electric current to electrodes; a direct current power supply circuit that supplies variable direct current electric power to the high frequency electric current generating circuit to adjust an output of the high frequency electric current generating circuit; a detecting circuit including at least a sensor for monitoring a therapeutic condition brought about by the high frequency electric current during a treatment; a therapeutic condition estimation circuit that estimates the therapeutic condition based on information of the therapeutic condition monitored during the treatment, the therapeutic condition estimation circuit selecting a target value corresponding to the estimated therapeutic condition upon completion of the treatment among a plurality of predetermined target values, said information being based on dimensions of a contact area between said electrodes and a treatment site; and a supplied power setting circuit that sets the electric power supplied by the direct current power supply circuit, the supplied power setting circuit reducing the electric power supplied by a predetermined fraction to a predetermined supply condition so as to reduce the high frequency electric current if a detected result of the detecting circuit reaches the target value selected by the therapeutic condition estimation circuit.