Surgical apparatus

A surgical apparatus comprising:

• a treatment section for treating a living tissue;
• an energy generation section that generates energy for providing ultrasound vibration or high-frequency current to the treatment section;
• a probe provided in the treatment section, the probe performing the ultrasound vibration;
• a liquid feeding unit for supplying a liquid;
• a liquid feeding conduit for feeding the liquid;
• a liquid feeding port, provided in the treatment section, for feeding the liquid from the liquid feeding conduit toward the probe in order to feed the liquid to between the living tissue and the treatment section;
• a liquid feeding unit for supplying the liquid to the liquid feeding conduit;
• an impedance detection section that detects an impedance of the living tissue that is in contact with the treatment section;
• and
• a control section that performs control so that in connection with stoppage of an output of the energy from the energy generation section, the liquid is supplied from the liquid feeding unit for a predetermined period of time or in a predetermined amount based on the impedance after the stoppage of the output of the energy, the control section controlling the liquid feeding unit so that as the impedance detected by the impedance detection section is larger, the predetermined period of time or the predetermined amount increases.