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LARMS
Airway Pressure High: Triggered when the airway pressure exceeds the High Airway
•
Pressure Limit value for two consecutive breaths. Patient related causes for this Medium
Priority alarm are patient coughing, ventilator dissynchrony, or excess secretions in the
airway. Other causes include kinks in the ventilator circuit tubing or a High Airway Pressure
value that is too low given the airway pressure. The default value at start up is 35 cm H
Pressing the MUTE/CANCEL button mutes the audible alarm for 30 seconds.
PEEP Not Met/Leak: Triggered when the ventilator detects a drift of more than 2 cm H
•
in the end expiratory pressure. This Medium Priority alarm is most often associated with a
loose or disconnected circuit hose or tube. The alarm can also be triggered when leaks are
present during noninvasive mask ventilation or when uncuffed endotracheal or
tracheostomy tubes are used. The operator should also check to make sure the exhalation
valve is firmly attached to the circuit and that the cap is securely attached to the body of the
assembly. Pressing the MUTE/CANCEL button mutes the audible alarm for 30 seconds.
Disconnect: Triggered when the peak airway pressure fails to go 5 cm H
•
baseline pressure before the end of the inspiratory phase. This Medium Priority alarm is
associated with disconnects between the patient port of the circuit and the patient airway. It
can also be caused by a loose or disconnected circuit hose or tube. Pressing the
MUTE/CANCEL button mutes the audible alarm for 30 seconds.
RTC Battery Fault/Failure: The voltage of the real-time clock (RTC) battery that powers
•
the memory that stores calibration and service information. The operator should take the
ventilator out of service when appropriate. A Low Priority alarm is sounded when RTC
battery voltage drops below the replacement threshold. Pressing the MUTE/CANCEL
button mutes the audible alarm, but the persistent message and yellow LED remain.
Calibration Due: This Low Priority alarm is triggered when the time since its last
•
calibration has passed its next due date. Pressing the MUTE/CANCEL button mutes the
audible alarm, but the persistent message and yellow LED remain.
Ambient Pressure Fault: Triggered when the ventilator senses that it is operating outside
•
of its designed ambient pressure range (-2,000 to 25,000 feet altitude). This Low Priority
alarm alerts the operator that there may be some effect on the delivered volume and to
monitor the airway pressure and breath sounds to assure adequate ventilation of the patient.
Pressing the MUTE/CANCEL button mutes the audible alarm, but the persistent message
and yellow LED remain.
Ambient Temperature Fault: Triggered when the ventilator senses that it is operating
•
outside of its designed temperature range (-25 to 50
operator that there may be some effect on the delivered volume and to monitor the airway
pressure and breath sounds to assure adequate ventilation of the patient. Pressing the
MUTE/CANCEL button mutes the audible alarm, but the persistent message and yellow
LED remain.
4-6
°
C). This Low Priority alarm alerts the
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