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3 • Safety Features
80113-101_V25087
2023-11
Chapter 3
Safety Features
Neutral electrode monitoring
The VIO 50 C/VIO 100 C is equipped with a neutral electrode monitoring system. The
neutral electrode monitoring system monitors the electrical connection between the
neutral electrode and the unit for single and dual surface neutral electrodes. The skin
contact is also monitored for dual surface neutral electrodes.
To optimally utilize the unit's monitoring functions, Erbe recommends connecting a
dual surface electrode, and in particular the Erbe NESSY Omega electrode. Apart from
many other advantages, this electrode virtually eliminates any possibility of excessive
heating of the tissue and skin at the edges of the electrode.
Monitoring the connection
between neutral electrode and unit
If the connection between unit and neutral electrode is interrupted or if the contact
tab for a neutral electrode with separate connecting cable is not fully inserted into the
connection clamp, the neutral electrode indicator light illuminates red. The monopolar
socket cannot be activated. A warning signal and error number is displayed when try
-
ing to activate the socket.
Monitoring the contact between
skin and neutral electrode
The skin contact is only monitored for dual surface neutral electrodes.
If the contact between skin and neutral electrode is interrupted, the neutral electrode
indicator light illuminates red. The monopolar socket cannot be activated. A warning
signal and error number is displayed when trying to activate the socket.
Short circuit in the connecting cable or in the clip of a dual surface neutral electrode
If a short circuit occurs in the connecting cable or in the clamp of a dual surface neutral
electrode, the unit can no longer monitor the contact with the patient's skin. You will
not receive a warning if the electrode becomes detached from the skin.
To rule out the possibility of a short circuit in the connecting cable and in the clamp,
you must test the connecting cable before use (see page
52).
Automatic monitoring of equipment output error
The unit is equipped with an automatic monitoring system for the HF output parame-
ters. This system monitors any divergence between the actual value and the setpoint
of the HF output parameters selected and emits warning signals or switches off the HF
generator if the divergence is so great that the required quality of the respective effect
(CUT or COAG) is no longer guaranteed. For the operating surgeon the display of any
equipment output error allows him to immediately see, in the event of divergence or
absence of the required effect, whether this defect has been caused by the unit. With
the unit, any divergence of the HF output parameters from the HF output parameters
actually selected can only be caused by loads with an excessively low resistance, e.g.
too large coagulation electrodes, short circuit between active electrode and neutral
electrode or by a defect in the unit.
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