Section 5 - Operation
Respiratory Volume Monitoring
Problem Resolution
PROBLEM POSSIBLE CAUSE REMEDY
Blank display area One full minute has
not elapsed (for
Minute Volume and
Respiratory Rate)
since respiration
began
Wait one minute to
read display.
Apnea condition Correct apnea
condition.
Blank display area,
VOL SENS DISC
and VOL ALRM
OFF alarm
messages on
central alarm
display
Sensor cord
disconnected
Reconnect sensor
cord plug to interface
panel on anesthesia
machine.
Sensor cord damaged Repair sensor cord.
REVERSE FLOW
alarm message on
central alarm
display
Leak between sensor
and expiratory valve
Check gasket; make
sure it is in good
condition and is
seated properly.
Expiratory valve not
closing completely
during inspiration
Check expiratory
valve disc and pins.
Clean, repair, or
replace expiratory
valve.
Defective sensor Repair or replace
sensor.
Tidal volume
readings obtained
are consistently
low and sensor is
noisy during
operation
Excessive friction in
sensor
Lubricate, repair, or
replace sensor.
5-11-7
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