Surgical treatment apparatus
AssigneeFUJIFILM Corporation
InventorsHiroyuki YAEGASHI, Kohei Higashi, Keisuke Aoshima
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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.
Claims10
A surgical treatment apparatus comprising:
- a gripping part that grips a biological tissue;
- an ultrasound oscillator that is provided at the gripping part and that includes a piezoelectric element;
- a support member that is provided at the gripping part and that supports the piezoelectric element;
- an impedance matching circuit for driving the piezoelectric element;
- a processor that controls an amount of power supplied to the piezoelectric element;
- and
- a stress concentration structure that is provided at the gripping part and that protrudes from a gripping surface facing the biological tissue,
- wherein the impedance matching circuit drives the piezoelectric element using a first driving frequency and a second driving frequency that are different from each other, and
- the support member has fixed portions fixed to the piezoelectric element and a non-fixed portion not fixed to the piezoelectric element.
Dependencies are inferred from the claim text.