High frequency operation apparatus and high frequency operation method

A high frequency operation apparatus comprising:

• a treatment section configured to perform a treatment of a living tissue as a treatment object, the treatment section having first and second paired treatment members with facing surfaces configured to open and close;
• a sensor configured to detect a distance between the first and second treatment members in a state where the living tissue as the treatment object is grasped by the first and second treatment members;
• a plurality of electrodes provided at the treatment section;
• a switch section connected to each of the plurality of electrodes and configured to switch between conduction and cut off of the plurality of electrodes so as to configure paired electrodes from the plurality of electrodes;
• a power supply section configured to supply high frequency power to the living tissue via the switch section and the paired electrodes which are made conductive by the switch section;
• a biological information measuring section configured to sequentially measure biological information of the living tissue in the case where a plurality of different sets of paired electrodes are formed and where the high frequency power is supplied from the power supply section via the each set of the plurality of sets of the electrode pairs by the switching of the switch section;
• a determining section configured to determine, by referring to a reference value, whether or not the measured values of the biological information, which are measured for the plurality of sets by the biological information measuring section, are within a predetermined range;
• a reference value storing section configured to store the reference values which are different according to information on the distance between the first and second paired treatment members;
• and
• a control section configured to control the power supply section to supply the high frequency power to the living tissue by using, as a bipolar electrode, only the paired electrodes corresponding to the measure value determined by the determining section as being within a predetermined range.