SURGICAL TREATMENT APPARATUS

Abstract

A gripping part includes an ultrasound oscillator including a piezoelectric element, a backing member that supports the piezoelectric element, and a stress concentration structure, the piezoelectric element is driven by an impedance matching circuit, and an amount of power supplied to the piezoelectric element is controlled by a processor. The impedance matching circuit drives the piezoelectric element using a first driving frequency and a second driving frequency, and the backing member is fixed to the piezoelectric element in a portion thereof and is not fixed to the piezoelectric element in a different portion thereof.

CPC Classifications