Surgery – Instruments – Electrical application
Reexamination Certificate
2007-02-06
2007-02-06
Peffley, Michael (Department: 3739)
Surgery
Instruments
Electrical application
C606S040000, C606S049000
Reexamination Certificate
active
10660400
ABSTRACT:
When a user steps on a footswitch, high-frequency output power is delivered. A control circuit included in a diathermic power supply calculates the impedance ZSn that is offered by a living tissue immediately after delivery of high-frequency output power is started during the n-th delivery period. The control circuit also calculates the impedance ZEn that is offered thereby immediately before delivery of high-frequency output power is discontinued with elapse of predetermined time. The control circuit then discontinues delivery of high-frequency output power for the predetermined time, and calculates a difference ΔZn between the impedances. When the difference meets a predetermined condition that implies coagulation or when the number of times of delivery reaches a predetermined value, the control circuit discontinues delivery of high-frequency output power.
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Harano Kenji
Hatta Shinji
Hijii Kazuya
Ohyama Masahide
Yamauchi Koji
Olympus Corporation
Peffley Michael
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