Patent ID: 8142429

Claim:
A high-frequency treatment apparatus comprising: a treatment high-frequency wave output unit configured to output a treatment high-frequency wave to be applied to a treatment target living tissue; a detection unit configured to detect an impedance of the treatment target living tissue; a control unit configured to control the treatment high-frequency wave output unit on the basis of the result of the detection in the detection unit, the control unit configured to set a treatment frequency of the treatment high-frequency wave to a first treatment frequency in order to treat the living tissue primarily by Joule heat when the impedance of the treatment target living tissue is lower than a threshold value and to set the treatment frequency to a second treatment frequency higher than the first treatment frequency in order to treat the living tissue primarily by high-frequency dielectric heating when the impedance of the treatment target living tissue is higher than the threshold value; and a detection high-frequency wave output unit configured to output a detection high-frequency wave to be applied to the treatment target living tissue and configured to be controlled by the control unit, wherein the detection unit is configured to calculate the impedance of the treatment target living tissue on the basis of the detection high-frequency wave output from the detection high-frequency wave output unit.