Patent ID: 8808286

Claim:
A surgical system comprising: a grasping section grasping a living biological tissue; a first energy output section applying ultrasound energy as first energy to the living biological tissue grasped by the grasping section; a second energy output section applying second energy which is a kind of energy different from the first energy to the living biological tissue grasped by the grasping section; an ultrasound impedance detection section detecting an ultrasound impedance value as a physical amount that corresponds to a change of the ultrasound energy that passes through the living biological tissue, the physical amount being obtained by applying the ultrasound energy to the living biological tissue; a storage section storing an increment value or decrement value of a crest factor of an output waveform of the second energy, the increment value or decrement value being detected by the ultrasound impedance detection section, the increment value or decrement value being determined beforehand so as to correspond to the ultrasound impedance value detected by the ultrasound impedance detection section, the increment value or decrement value being associated with the ultrasound impedance value; a determination section determining whether or not the ultrasound impedance value detected by the ultrasound impedance detection section is within a predetermined range; and a control section performing control to adjust an output of the second energy to be applied to the living biological tissue so as to, when the determination section determines that the ultrasound impedance value is greater than an upper limit of the predetermined range, output the second energy decreased by the decrement value of the crest factor stored in the storage section, and when the determination section determines that the ultrasound impedance value is smaller than a lower limit of the predetermined range, output the second energy increased by the increment value of the crest factor stored in the storage section.