Patent ID: 7927300

Claim:
An ultrasonic operation apparatus, comprising: a hand piece having an ultrasonic vibrator configured to cause ultrasonic vibrations, and a probe configured to treat by transmitting the ultrasonic vibrations from the ultrasonic vibrator to a living body tissue; a driver, removably connected to the hand piece, having a driving signal generating portion configured to generate a driving signal for driving the ultrasonic vibrator; a discriminating portion configured to discriminate the hand piece connected to the driver; a sweep portion configured to sweep the driving signal supplied from the driving signal generating portion to the ultrasonic vibrator based on a discrimination result of the discriminating portion; a sweeping speed control portion configured to control a sweeping speed of the sweep portion based on a condition information of the driving signal swept by the sweep portion; a resonance point detecting portion configured to detect a resonance point of the ultrasonic vibrator of the hand piece from a driving signal having a sweeping speed changed by the sweeping speed control portion; and a tracking and control portion configured to track and control the resonance point based on a detection result of the resonance point detecting portion and a phase information of the driving signal.