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Ensure that the device does not come in direct contact with the patient
or in the sterile area respectively.
►
Ensure that the user does not come into direct contact with the patient
and the HF device at the same time.
Patient safety
Danger due to inadequate preparation or faults in
the HF surgical device!
►
Check that the HF surgical device is in perfect
DANGER
working order.
►
Ensure that neither the foot switch nor the hand
switch has been penetrated by conductive fluids
(e.g. blood, amniotic fluid).
►
Ensure there is no short circuit in the foot or
hand switch cables.
Risk of burns suffered by the patient due to inad-
vertent activation of the HF surgical device!
►
In case of any inadvertent activation of the HF
WARNING
surgical device, switch off the device immedi-
ately at the OFF/ON switch.
►
Always exercise particular care when operating
the foot switch.
Risk of injury to the patient due to uncontrolled
rise of the HF output voltage due to some fault in
the HF surgical device!
WARNING
►
Stop using the HF surgical device as soon as it
shows even the slightest anomaly.
Risk of injury to patients/users due to defective
power cord or missing protective ground connec-
tions!
WARNING
►
Check the mains power cord/protective ground
connections.
Danger of injuries due to muscle contraction,
caused by stimulation of the nerves and muscles!
►
WARNING
Work with particular care on sensitive struc-
tures.
Always be sure to do the following:
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Position the patient in such a way that s/he is not in contact with any
metal parts that are grounded or have a significant electric capacity
against ground (e.g. operating table, fixtures). If necessary, interpose
antistatic drape.
►
Ensure that the patient will not be in contact with any damp cloths,
drapes or bedding.
►
Safeguard areas prone to strong perspiration against skin contact with
the trunk of the patient's body by inserting antistatic tissue between
such areas and the trunk.
►
Siphon off urine with a catheter.
►
For patients with cardiac pacemaker or other active implants, consult
with the relevant medical specialist prior to applying HF surgery, so
that irreparable damage to the pacemaker or implant can be avoided.
►
If possible, remove from the vicinity of HF electrodes any electrodes
from physiological monitoring devices that are not equipped with pro-
tective resistors or HF dampers.
►
Do not use needle electrodes for intraoperative monitoring.
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Use monitoring systems fitted with devices to limit the HF current.
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Arrange the wires and cables of monitoring devices in such a way that
they do not come in contact with the patient's skin.
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Keep the leads to the HF electrodes as short as possible, and arrange
them in such a way that they do not touch the patient or any other
wires or cables.
►
To avoid unwanted coagulation in other areas of the body when per-
forming surgery on body parts with small cross-sections and on such
high-resistance areas as bones and joints: Use bipolar technique in
those areas.
►
Do not remove hot electrodes from the patient's body immediately
after performing cutting or coagulation procedures.
►
Never put down HF instruments or active electrodes on or next to the
patient.
►
Put down active electrodes that are not needed at any particular
moment, in such a way that they will not touch the patient.
►
Adjust the HF power output according to the intended surgical inter-
vention. taking into account clinical experience and reference param-
eters.
►
Always set the power output of HF devices to as low a level as possible.
►
Should the output power appear insufficient with the usual settings,
check that:
– neutral electrodes are placed properly,
– the working electrodes are clean,
– all plug connections are properly in place.
►
In operations where continuous contact between the electrodes and
the patient cannot be avoided (e.g. endoscopic operations), switch off
the HF device immediately on the "Device on/off" switch after an acci-
dental activation.
►
Adjust the acoustic warning, which signals the activation of the elec-
trode, to such a level that it will always be heard without difficulty.
Application of the neutral electrode
The function of the neutral electrodes in monopolar HF surgery is to return
the electricity that enters the patient's body at the operating site to the
HF device. Typically, either reusable neutral electrodes made of conductive
rubber, or self-adhesive disposable electrodes are usually used. Both neu-
tral electrode types are quite suitable for use on uneven body surfaces.
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