Patent ID: 9028434
Filing Date: 2015-05-12
Classification: A61B,B06B

Abstract:
1. An ultrasound operation apparatus for treating a living tissue, the apparatus comprising: an ultrasound transducer configured to generate ultrasound oscillation; a probe having a proximal end section operatively coupled to the ultrasound transducer and a distal end section that generates ultrasound oscillation, the probe being configured to transmit the ultrasound oscillation generated by the ultrasound transducer from the proximal end section to the distal end section; a resonant frequency tracking section configured to automatically adjust a frequency of a drive signal so as to track a resonant frequency of the ultrasound transducer and cause the distal end section to ultrasound-oscillate at the resonant frequency; a setting section configured to allow an operator to set a value as a target level of a cavitation to be generated during treatment of the living tissue; a detecting section configured to detect a generation level of the cavitation by detecting a signal level of a frequency component signal obtained by integrating the drive signal in a predetermined frequency band excluding the resonant frequency; and a control section configured to compare the generation level of the cavitation which is detected by the detecting section with the target level set by the setting section, and perform control so as to vary an output of the drive signal such that the generation level is at the target level; wherein the detecting section includes a state detecting section that detects a state of dryness of a tissue to be treated or a contact state between the tissue to be treated and the distal end section by detecting the frequency component signal.