Fukuda Denshi HS-8000 Series, Service Manual

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Electrosurgery Safety
W A R N I N G
The monitoring system contains protection against interference generated by
electrosurgical instruments. However, operating conditions, surgery site with
respect to the location of ECG electrodes, or the type of instrument used,
may cause noise on the ECG. The noise is generated at the tip of an
electrical knife and is difficult to completely eliminate because of the
frequency components of the ECG. To reduce electrosurgical interference,
take the following precautions:
Location
Locate the electrosurgical unit as far as possible from this unit and the patient
cable. This will help reduce interference on the ECG through the monitor or
cables.
Power Supply
Connect the electrosurgical unit to a power supply that is different from that of the
monitor. This will help prevent interference through the power cable.
Electrode Placement
The amount of interference is considerably different depending on the electrode
position and surgery site. Place the ECG electrodes as far away as possible from
the surgery site. Do not place electrodes in the path between the surgery site and
the ground plate. If the electrodes are placed in this path, the amount of
interference will be quite large. Position (+) and (–) electrodes as close as
possible to each other.
Ground Plate
When using electrosurgical instruments, make sure the contact between the
patient and the ground plate is secure. If the connection is incomplete, the patient
may suffer a burn at the electrode site.
Precautions about Magnetic Resonance Imaging
W A R N I N G
z Do not operate this equipment in magnetic resonance imaging (MRI)
environments.
z When conducting MRI test, remove the electrodes and sensors connected
to the patient (test subject).
The local heating caused by the induced electromotive force may cause burn
injury to the patient (subject). For details, refer to the operation manual for the
MRI testing device.
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