5 Patient Alarms and INOPs
INOP Message, Indication
BIS SENSOR USAGE
BIS SQI < 15% (INOP tone)
BIS SQI < 50% (no INOP tone)
CANNOT ANALYZE ECG
CANNOT ANALYZE QT
CANNOT ANALYZE ST
CCI NO BSA
CCI numeric unavailable
CCO BAD PRESS SIGN
numeric is replaced by -?-
What to do
Excessive sensor usage. Replace sensor.
A Cyclic Impedance Check will start automatically.
If the signal quality is below 50%, BIS numerics cannot be
If the signal quality is below 15%, no BIS numerics can be
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).
Plug in the BIS module. Silencing this INOP switches off the
The BISx is not connected to the BIS module or the BIS
interface board. Silencing this INOP switches the measurement
The BISx software is not compatible with the BIS module or
with the MP20/MP30 monitor software. A software upgrade
may be required. Contact your service personnel.
The BISx is faulty. Disconnect and reconnect it to the module
or BIS interface board. If the INOP persists, replace the BISx.
MP20/MP30 - Malfunction on interface board. If the INOP
persists, contact your service personnel.
The arrhythmia algorithm cannot reliably analyze the ECG
data. Check the ECG signal quality of the selected primary and
secondary leads. If necessary, improve lead position or reduce
If you have arrhythmia analysis on, and you are not getting a
reliable HR because the signal is below a minimum amplitude,
unstable, or contains artifact, and you have tried to improve the
system performance by choosing another lead and changing
electrodes, you should consider turning arrhythmia analysis off.
The QT algorithm cannot generate a valid QT value for more
than 10 minutes, or 1 minute in the initial phase.
The ST algorithm cannot generate a valid ST value. Possible
causes are large variations in the measured ST values for
consecutive beats, or ventricular paced beats. Review the ECG
signal quality and the ST measurement points.
If the patient has a ventricular pacemaker, ST analysis is not
CCI cannot be calculated because the patient's body surface
area is unknown. Enter the patient weight and height to
provide the BSA for CCI calculation.
The arterial pressure wave can currently not be used for pulse
contour calculation for CCO or CCI measurement. Possible
causes are air bubbles in the tubing or a physiological
condition, for example severe arrhythmia.
Technical Alarm Messages (INOPs)