Surgical treatment apparatus
AssigneeFUJIFILM Corporation
InventorsNobuyuki TADA, Kohei HIGASHI
Life of this patent
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Abstract
A surgical treatment apparatus comprises a probe that includes a piezoelectric element, a power supply circuit for driving the piezoelectric element, a power supply wiring line to the piezoelectric element, and an impedance matching circuit, in which the probe has electrode layers for power supply on both surfaces of the piezoelectric element, and the impedance matching circuit sets a driving frequency used in the power supply to a frequency lower than a resonance frequency in an impedance characteristic at a treatment start temperature of the probe and a frequency at which a reactance component of impedance becomes 0Ω.
Claims9
A surgical treatment apparatus comprising:
- a probe that includes a piezoelectric element;
- a power supply circuit for driving the piezoelectric element;
- a power supply wiring line to the piezoelectric element;
- a flexible tubular sheath;
- a control mechanism for the amount of power supplied to the piezoelectric element;
- and
- an impedance matching circuit,
- wherein the probe has electrode layers for power supply on both surfaces of the piezoelectric element and an opening and closing mechanism that grips biological tissue,
- the flexible tubular sheath includes the power supply wiring line to the piezoelectric element and a part of the opening and closing mechanism of the probe, and
- the impedance matching circuit sets a driving frequency used in the power supply to the piezoelectric element to a frequency lower than a resonance frequency in an impedance characteristic at a treatment start temperature of the probe and a frequency at which a reactance component of impedance becomes 0 Ω.
Dependencies are inferred from the claim text.