2 Safety
18 Operating Manual ARC 400 BOWA-IFU-11779-ARC400-V2.1.0-S0-EN
To prevent the patient being burned by the neutral electrode, you must
comply with the following conditions:
Select the application point for the neutral electrode so that
the current paths between the active and neutral electrodes
are as short as possible and run longitudinally or diagonally
through the patient’s body (because muscles are more
conductive in the direction of the fibrils).
Figure 2-1: Application point of neutral electrode
For surgery in the thoracic region, do not run the current
path transversely across the patient’s body and ensure that
the patient’s heart is never in the current path.
Depending on the surgical site, apply the neutral electrode
to the nearest upper arm or thigh if possible, but never
closer than 20 cm.
In the case of self-adhesive disposable electrodes, comply
with any further manufacturer instructions regarding the
point of application.
Ensure that the application area is free of scar tissue, bony
protuberances, surface hair and ECG electrodes.
Ensure that there are no implants (e.g. bone nails, bone
plates or endoprostheses) in the current path.
Ensure that no short circuits can occur at the neutral
electrode connection.
Avoid areas where fluids may collect.
Use split neutral electrodes with a sufficiently large surface
area (patient age and max. output power during operation
have to be considered).
Before applying the neutral electrode
Shave the area where the neutral electrode will be applied.
Clean the application site, but do not use any alcohol, since it dries out
the skin and increases the contact resistance.
If the patient has poor circulation, massage or brush the application
site.
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