Surgical operation system and surgical operation method

A surgical operation system comprising:

• a treatment section that treats a living tissue of a treatment target;
• an ultrasound oscillation generation section that provides ultrasound oscillation, having an ultrasound energy amount required to treat the living tissue, to the treatment section;
• an ultrasound drive power supply section that supplies drive power that generates the ultrasound oscillation to the ultrasound oscillation generation section;
• a high-frequency power supply section that supplies high-frequency power, having a high-frequency energy amount required to treat the living tissue, to the treatment section;
• an ultrasound impedance detection section that detects an ultrasound impedance value as a load impedance value when the ultrasound oscillation is provided to the living tissue via the treatment section;
• a high-frequency impedance detection section that detects a high-frequency impedance value as a load impedance value when the high-frequency power is supplied to the living tissue via the treatment section;
• a first control section that variably controls an increase and decrease of a value of the drive power that corresponds to the ultrasound energy amount generated by the ultrasound generation section in response to the ultrasound impedance value detected by the ultrasound impedance detection section in a state where the ultrasound oscillation and the high frequency power are supplied to the living tissue at the same time by the treatment section;
• and
• a second control section that variably controls an increase and decrease of a value of the high-frequency power having the high frequency energy amount generated by the high-frequency power supply section in response to a high-frequency impedance value detected by the high-frequency impedance detection section in a state where the ultrasound oscillation and the high-frequency power are simultaneously supplied to the living tissue by the treatment section.