Puritan Bennett™ 840 Ventilator User's Pocket Guide - Covidien

TaBle 2. Alarm messages (continued)
When you see it means: do this:
this message:
32
O 2 SENSOR
­P CIRC
(High circuit
pressure)
­O 2 %
(High delivered
O 2 %)
­V TE
(High exhaled
tidal volume)
­V .
E TOT
(High exhaled
total minute
volume)
Background checks
have detected a
problem with the O 2
sensor.
The measured airway
pressure is equal to or
greater than the set
limit. Reduced tidal
volume likely.
The O 2 % measured
during any phase of a
breath cycle is 7% (12%
during the first hour
of operation) or more
above the O 2 % setting
for at least 30 seconds.
(These percentages
increase by 5% for four
minutes following a
decrease in the O 2 %
setting.)
The patient’s exhaled
tidal volume for any
breath is equal to or
greater than the set
limit.
The patient’s expiratory
minute volume is equal
to or greater than the
set limit.
O 2 sensor is out of
calibration or has
failed. Press 100%
O 2 CAL; replace or
disable the sensor.
Check patient,
patient circuit and
endotracheal tube.
Check patient, air
and oxygen supplies,
oxygen analyzer
and ventilator.
Check patient and
settings. Consider
whether the patient’s
compliance or
resistance has
changed.
Check patient
and settings.
Puritan Bennett 840 Ventilator Pocket Guide