ultrasonic surgical apparatus includes a probe having an active edge or working surface to a distal end, an electromechanical transducer connected to the probe, an electrical waveform having an ultrasonic frequency and amplitude to the electromechanical transducer and a hydraulic circuit connected to the electromechanical transducer to provide. Actuating circuit includes a signal generator comprises an output reduction circuit operatively connected to the signal generator further output reduction circuit, when sensed by the output reduction circuit to reduce the load on the probe, the signal generator automatically reduces the amplitude of the electrical waveform vessel超音波手術装置は、遠位端に作用エッジ又は作用表面を備えたプローブと、プローブに接続された電気機械変換器と、電気機械変換器に超音波周波数及び振幅を有する電気波形を供給するために電気機械変換器に接続された作動回路とを含む。作動回路は、信号発生器を含み、信号発生器に動作可能に接続された出力低減回路を更に含み、出力低減回路は、プローブでの負荷の低減を出力低減回路によって感知した際に、信号発生器に電気波形の振幅を自動的に低減させる。
