Dräger Cato Instructions For Use Manual page 76

Messages, cause and remedy
Messages on the monitor
Messages on the monitor
Messages
ET CO2 LOW !!
EXP-VALVE ? !!
FRESH GAS ? !!
INSP CO2 HI !
MIN VOL HIGH !!
MIN VOL LOW !!
N2O ERR !
NO SPO2 PULS !!!
O2 xx % !
<
PAW HIGH !!!
PAW NEGATIVE !!!
PRESS ERR !
PRESS EXP HI !!!
76
Cause
End-expiratory CO concentration below lower
2
alarm limit for at least two breaths.
Fault in expiration valve. Measured value for minute
ventilation may be excessive.
Too little gas in manual ventilation bag.
Inspiratory CO concentration is above upper
2
alarm limit of 5 mmHg.
Minute volume exceeds upper alarm limit.
Minute volume below lower alarm limit.
Tube clogged / kinked?
Leak in breathing system?
Ventilation volume limited by pressure limitation?
N O gas measurement faulty.
2
No pulse signal detected by SpO
for approx. 10 seconds.
The alarm limit appears after the parameter
designation if the alarm limit for the inspiratory
O concentration is below 21%.
2
Airway pressure exceeds the upper alarm limit.
Ventilation hose kinked? Stenosis?
Pulmonary problem? Cough?
Negative airway pressure measured.
Pressure sensor defective.
End-expiratory pressure more than 10 mbar over
PEEP.
Remedy
Check ventilation.
Check expiration valve.
This message can be deacti-
vated until the next leak test by
pressing the key for muting the
audible alarmtone.
Increase fresh gas flow. Repair
any leaks in hose system.
Replace the soda lime in the
circle system of the anaesthetic
workstation.
Correct tidal volume or
respiration rate on ventilator.
Check tube and hoses.
Seal breathing system.
Correct ventilation pattern.
Call DrägerService.
measurement Check SpO
2
off? NiBP measurement on
same arm?).
Check patient's condition!
Check hose system, tube and
fresh gas flow.
Check hose system and tube on
ventilator.
Call DrägerService.
Extend expiration period.
Check hose system and
microbial filter.
Empty water traps.
sensor (dropped
2