Alarm settings and conditions
English 115
Respiratory rate alarms
Respiratory rate alarms activate when the average respiratory rate (Resp. rate) exceeds the
corresponding alarm setting (no delay).
Respiratory rate alarms will not activate during the first 60 seconds of ventilation.
Alarm message
Activates when
Alarm setting (per min)
Low Resp Rate
Respiratory rate is less than the Low Resp rate setting
Adult: Off, 2 to 79 [4]
Paed: Off, 5 to 98 [12]
High Resp Rate
Respiratory rate is greater than the High Resp rate setting Adult: Off, 3 to 80 [80]
Paed: Off, 6 to 99 [99]
Pressure alarms/limits
Pressure alarms include:
•
High Pressure
•
Obstruction
•
Low Pressure
•
PEEP.
High pressure
For pressure-target modes, the High Pressure setting acts as a pressure limit, holding pressure-target
therapies to 2 cmH
2
O less than the High Pressure setting. Refer to Making use of Astral's High Pressure
limit on page 88. This allows the clinician to globally limit pressure therapies if required (eg, in the context
of mask NIV).
The Astral High Pressure limit acts as a traditional High Pressure alarm for volume target therapies and
fault situations, as described below.
When a high inspiratory pressure is detected during volume target modes, the Astral device immediately
cycles to the expiratory phase and an information message is displayed. Sustained high pressure will
result in the following alarms.
High pressure may be caused by change in patient conditions.
Alarm
Activates when
Alarm setting (cmH
2
O)
High Pressure
(Medium priority)
For 3 consecutive breaths, the Monitored Pressure exceeds
the Pressure alarm setting or the Inspiratory port pressure
exceeds 85* cmH
2
O.
10 to 80* [40]
High Pressure
(High priority)
For 10 consecutive breaths, the Monitored Pressure
exceeds the Pressure alarm setting or the Inspiratory port
pressure exceeds 85* cmH
2
O.
10 to 80* [40]
*Not applicable on all device variants
Note: A high pressure alarm will initially be raised as a Medium priority and will be escalated to High priority if the
condition persists.
Summary of Contents for Astral 100
Page 1: ...Clinical guide English ...
