Erbe HybridAPC Manual Del Usuario página 25

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5.8 In the case of endoscopic use: protection against
HF leakage current at the ocular
The HF leakage current at the ocular of the endoscope may
cause thermal injury to the user. In order to prevent this, please
use only endoscopes designed for use with electrosurgical devic-
es.
5.9 Risks in the case of endoscopic use
Risk of capacitive coupling: HF current can be transferred from
the activated instrument to the endoscope, even if the two are
not touching (known as "capacitive coupling"). Risk of burns to
the patient and/or operating theater staff. Only use endoscopes
designed for use with electrosurgical devices.
Unwanted stimulation of nerves and muscles due to low-fre-
quency currents. Dangerous summation of patient leakage cur-
rents from several power sources: It is not possible to entirely
avoid low-frequency currents in electrosurgery, but they can be
limited by applying technical measures to equipment and acces-
sories. Limit types show how wide-ranging these measures are,
e.g. type B, BF or CF as per EN 60601. Type CF offers the highest
level of protection against low-frequency currents. However,
please note the following: If you use an electrosurgical device
and an endoscope that is supplied with energy at the same time,
the low-frequency currents from both power sources accumu-
late to form one single patient leakage current. If the electrosur-
gical device belongs to type CF and the endoscope to type BF, the
less favorable limit values for type BF apply to the overall patient
leakage current. You should therefore only use power sources
with the same type classification, ideally those of type CF.
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