High-frequency power supply device and electrosurgical device

Details High-frequency power supply device and electrosurgical device High-frequency power supply device and electrosurgical device

2006-11-06

2010-06-29

Dvorak, Linda C (Department: 3739)

Surgery

Instruments

Electrical application

C606S034000, C606S037000

Reexamination Certificate

active

07744593

ABSTRACT:
A high-frequency power supply device and an electrosurgical device are provided which can automatically control the output of an appropriate high-frequency current in accordance with the condition of a biological tissue to be treated. A phase detection unit detects respective phases of a high-frequency voltage and a high-frequency current outputted in a high-frequency power generation unit, and thereafter a phase difference calculation unit calculates the phase difference based on the respective phases. Meanwhile, an impedance calculation unit calculates the impedance on the basis of respective magnitudes of the high-frequency voltage and the high-frequency current. In this case, on the basis of at least one of the impedance and the phase difference and the output state of an instruction signal, a control unit performs a control to output a high-frequency voltage and a high-frequency current having a predetermined waveform. Accordingly, the output of the appropriate high-frequency current can be automatically controlled.

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Abstract of WO 95/03743, dated Feb. 9, 1995.

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