Alarm Priorities - ZOLL AEV Operator's Manual

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Alarm Priorities

Alarm priorities define the operational state of the device regarding its ability to provide
mechanical ventilation. The alarm priority determines what effect pressing the
MUTE/CANCEL button has. There are three priorities:
High Priority: Mechanical ventilation under operator control is no longer possible. This
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alarm category requires immediate intervention by the operator. This includes system failure
alarms where the CPU has failed and a backup has taken over to sound the audible and
visual alarms. It also includes when the device is turned on and there is no internal or
external power source. Pressing the MUTE/CANCEL button has no affect on the High
Priority alarm. The alarm can only be silenced by turning off the ventilator.
Medium Priority: Mechanical ventilation is active or is possible (maybe for a finite period
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of time), but there is a failure/fault with the patient, ventilator circuit, a pneumatic
subsystem, or pulse oximeter. This alarm category requires immediate intervention by the
operator. Pressing the MUTE/CANCEL button mutes Medium Priority alarms for 30
seconds. If after 30 seconds the alarm-causing condition still exists, the audible alarm recurs
until it is muted again for another 30 second period or resolves.
Low Priority (Advisory): Safe mechanical ventilation is active, but there is a fault that the
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operator must be aware of to ensure safe management of the patient and/or ventilator. Low
Priority alarms present themselves with both an audible and yellow LED alarm signal
alerting the operator to the condition. Pressing the MUTE/CANCEL button cancels the
audible signal. If the alarm is not resolved, the yellow LED remains illuminated to remind
the operator of the fault or failure. You can cancel some Low Priority alarms to avoid
nuisance alarms.
If the alarms are Low Priority, then the Pleth and Pressure/Time plots appear permanently on
the screen when the alarms are muted. If the alarms are Medium Priority, the unit cycles
through each Medium Priority Alarm for a 20 second period. You can use the selection dial to
select a particular Medium Priority Alarm and/or Plot for 20 seconds, after which the above
cycling rotation resumes. New Alarms can overwrite the screen at any time.
The first digit in the service code indicates the alarm priority:
4-20
1###: High Priority alarms
2###: Medium Priority alarms
3###: Low Priority alarms
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