Electric operation apparatus
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United States of America Patent
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-
Feb 6, 2007
Issued Date -
N/A
app pub date -
Sep 11, 2003
filing date -
Aug 23, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
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 .DELTA.Zn 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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