2 Safety
900-301_IFU-V2.2_11316-S0-20131023-EN Operating Manual ARC 250 / 303 23
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 to the patient's body (because muscles are
more conductive in the direction of the fibrils).
Figure 2-1: Application point of neutral electrode
During 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 path of the
current.
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 specifications
regarding the point of application.
Ensure that the application point is free of scar tissue,
bony protuberances, surface hair and ECG elecrodes.
Ensure that there are no implants (e.g. bone nails, bone
plates, endoprostheses) in the current path.
Ensure that no short circuits can occur at the neutral
electrode connection.
Avoid locations where fluids may collect.
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, as it dries
out the skin and increases the transition resistance.
If the patient has poor circulation, massage or brush the application
site.
Apply the neutral electrode using the entire contact surface. Secure
reusable neutral electrodes with rubber bands or elastic ties so that
they do not loosen or fall off when the patient moves. Ensure that
the patient's circulation is not impaired (risk of necrosis).
Never use wet towels or electropastes.
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