Chapter 5 Operation
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W7.091.601
ELECTROSURGICAL GENERATOR ESG-400
In the deactivated state of the electrosurgical generator, the “Set screen” shows
an application time counter in minutes:seconds and an energy counter in
Kilojoules (see figure 5.8), indicating previous treatment parameters. Both
counters can be set to zero (“00:00”, “0.00 kJ”) either by switching off the
electrosurgical generator or by pressing the “Reset button”.
During activation of the electrosurgical generator, the total amount of energy
emitted is constantly updated in the energy counter and the total duration of
power application is constantly updated in the time counter, either in the “Set
screen” or in the “All screen” (see figures 5.8 and 5.9 respectively).
Without RCAP
The medical purpose of RFCoag without RCAP (“Resistance Controlled
Automatic Power”) mode is to achieve controlled tissue coagulation. To select
the RFCoag without RCAP mode, press the “RCAP button” until the “RCAP
button” is not in gray color.
During activation, the electrosurgical generator provides audible feedback of the
coagulation status. The frequency of the output tone is proportional to the tissue
resistance at any particular moment. As the measured tissue resistance
increases, the frequency of the audible feedback tone also increases. This
permits audible monitoring of the coagulation status, since the latter is directly
connected with the tissue resistance.
Energy is applied until the tissue resistance exceeds a limit value (see
“Specifications” in the Appendix). Then the power output is automatically
stopped because the coagulation process is completed due to desiccation of
the tissue (see “Output characteristics” in the Appendix). This is indicated by an
intermittent audible signal.
With RCAP
The medical purpose of RFCoag with RCAP mode is used to achieve deep
tissue coagulation without significant tissue desiccation. To activate the
RFCoag with RCAP mode, press the “RCAP button” until the “RCAP button” is
in gray color.
Once the tissue resistance increases significantly, which indicates beginning
tissue desiccation, the power is reduced automatically. This enables the tissue
to rehydrate, resulting in normal electrical resistance of the tissue after a few
seconds. Detecting this decrease of resistance, the electrosurgical generator
automatically increases the power again to the preset level and continues the
heating process. This cycle will be repeated until the activation is stopped or the
tissue resistance exceeds a limit value. In the latter case, the power output is
automatically stopped. This is indicated by an intermittent audible signal.
Summary of Contents for ESG-400
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