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Neutral electrode operation
7 Neutral electrode operation
Only for monopolar treatments
Only for monopolar treatments neutral electrodes are required to return the HF current from
the active electrode of the HF instrument back to the electrosurgical generator. In bipolar
electrosurgery both electrodes, the active and the return electrode, are implemented within
the HF instrument.
7.1 Safety information for neutral electrode operation
Improper connection between the neutral electrode and the patient’s skin surface may cause
burns.
• When attaching a neutral electrode, consider the safety notes as described below.
• For further details on neutral electrodes, refer to the specific instructions for use of the
neutral electrode.
DANGER
Neutral electrodes for infants
If the output power of the electrosurgical generator exceeds the permissible power of a
neutral electrode for infants (patient weight 0...15 kg), then this will result in severe burns to
the patient.
• Only use output settings within the permissible range of output power for the neutral
electrode. Refer to the instructions for use of the neutral electrode.
WARNING
Size of neutral electrodes
If the size of the neutral electrode is too small for the patient, then this could result in burns
to the patient.
• Choose the largest possible neutral electrode that is adequate for the patient.
• Consider the size of the neutral electrode particularly for obese patients.
• Consider the size of the neutral electrode particularly if high output power levels are
needed.
WARNING
Non-split type neutral electrodes
If non-split type neutral electrodes are used, then the contact quality monitor does not work.
In case that the non-split type neutral electrode detaches from the patient, then no warning
signal sounds. This could result in burns to the patient.
• Only use split type neutral electrodes. Refer to the section “Compatible neutral electrodes”
on page 89.
WARNING
Mechanical tissue cutting
If the HF instrument is at the treatment site when a neutral electrode failure is indicated, then
tissue might be cut mechanically with the HF instrument. This could result in bleeding and
perforation.
• Note that the output of energy automatically stops when the CQM indicates a neutral
electrode failure.
DRAFT
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2017-01-17