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Technical Alarm Messages (INOPs) 4 Patient Alarms and INOPs
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BIS ISOELECTRC EEG BIS No discernible EEG activity is detected for longer than one
minute.
Check the patient. Check that the electrodes are properly
connected.
BIS LEAD OFF
INOP tone may sound
BIS One or more electrodes have no skin contact and therefore
impedances cannot be measured. Check the sensor montage
and press the electrode pads firmly.
If this INOP persists, replace the sensor(s) in question, using
correct skin preparation.
BIS OVERCURRENT
INOP tone
BIS Unplug and replug the BIS module or, f or the MP20/MP30,
disconnect and reconnect the BISx from the Interface board. If
the INOP persists, contact your service personnel.
BIS SENSOR DISCONN
INOP tone
BIS The sensor is not properly connected to the patient interface
cable (PIC) and/or the PIC is not properly connected to the
DSC or BISx, or the sensor or PIC or DSC or BISx may be
faulty.
Check all the connections.
Disconnect and reconnect the sensor, PIC, DSC, BISx.
If the INOP persists, replace the sensor.
If the INOP persists, replace PIC. If INOP persists, contact
your service personnel.
Silencing this INOP switches the measurement off.
BIS SENSOR INCOMPAT
INOP tone
BIS Unsupported sensor connected or sensor type unknown or not
supported by your software revision. Replace the sensor, using
only Philips supported sensors.
BIS SENSOR MALFUNC
INOP tone
BIS Malfunction in the sensor hardware, most often caused by
liquids permeating into the connectors OR patient interface
cable (PIC) or DSC or BISx may be faulty.
Replace the sensor. Manually initiate a Cyclic Impedance
Check. Make sure all electrodes pass the test. Make sure that
the both sides of the PIC connector (between PIC and sensor)
are dry. If you are not sure that the connector is dry, replace the
PIC until it has dried. If this INOP persists, contact your
service personnel.
BIS SENSOR USAGE
INOP tone
BIS Excessive sensor usage. Replace sensor.
A Cyclic Impedance Check will start automatically.
BIS SQI < 15% (INOP tone)
OR
BIS SQI < 50% (no INOP tone)
BIS If the signal quality is below 50%, BIS numerics cannot be
reliably derived.
If the signal quality is below 15%, no BIS numerics can be
derived.
This may occur as a result of artifacts such as those generated
from motion or the presence of electrocautery devices. Make
sure the sensor is properly attached to the patient. Manually
initiate a Cyclic Impedance Check. Make sure all electrodes
pass the test. Make sure the patient is completely relaxed (even
small motions of the facial muscles affect the signal quality).
BIS UNPLUGGED
INOP tone
BIS Plug in the BIS module. Silencing this INOP switches off the
measurement.
BISx DISCONNECTED
INOP tone
BIS The BISx is not connected to the BIS module or the BIS
interface board. Silencing this INOP switches the measurement
off.
INOP Message, Indication Source What to do