Alarm settings and conditions
114
Alarm settings and conditions
This section details the alarms and their activation conditions. If the alarm has adjustable settings these
are described. Unless otherwise noted, alarms are applicable to all modes. Values provided within
[square brackets] are the default settings.
As soon as the activation condition is met, the Astral device provides both audible and visual alerts
without delay.
Tidal volume alarms
Tidal volume alarms activate when the monitored tidal volume parameter (Vti or Vte) exceeds the Vt
alarm setting.
Tidal volume alarms may be used to detect:
•
change in patient lung condition
•
leak or obstruction in patient circuit or valve.
Alarm
Activates when
Alarm setting (mL)
Low Vti
Inspiratory tidal volume is less than Low Vt for the duration
of three breaths at the current average respiratory rate.
Adult: Off, 50 to 2990 [100]
Paed: Off, 10 to 995 [25]
High Vti
Inspiratory tidal volume is greater than High Vt for three
consecutive breaths.
Adult: Off, 60 to 3000 [2500]
Paed: Off, 25 to 1000 [500]
Low Vte
Expiratory tidal volume is less than Low Vt for the duration
of three breaths at the current average respiratory rate.
Adult: Off, 50 to 2990 [100]
Paed: Off, 10 to 995 [25]
High Vte
Expiratory tidal volume is greater than High Vt for three
consecutive breaths
Adult: Off, 60 to 3000 [2500]
Paed: Off, 25 to 1000 [500]
WARNING
The measurement of tidal volumes may be affected by leak.
Minute volume alarms
Minute volume alarms activate when the monitored minute volume parameter (MVi or MVe) exceeds the
MV alarm setting (no delay).
Minute volume alarms will not activate during the first 60 seconds of ventilation.
Minute volume alarms may be used to detect:
•
change in patient lung condition
•
leak or obstruction in patient circuit or valve.
Alarm message
Activates when
Alarm setting (L)
Low MVi
Inspiratory minute ventilation is less than Low MV
Adult: Off, 0.5 to 59.9 [3]
Paed: Off, 0.2 to 59.9 [0.5]
High MVi
Inspiratory minute ventilation is greater than High MV
Adult: Off, 0.6 to 60 [20]
Paed: Off, 0.3 to 60 [10]
Low MVe
Expiratory minute ventilation is less than Low MV
Adult: Off, 0.5 to 59.9 [3]
Paed: Off, 0.2 to 59.9 [0.5]
High MVe
Expiratory minute ventilation is greater than High MV
Adult: Off, 0.6 to 60 [20]
Paed: Off, 0.3 to 60 [10]
Summary of Contents for Astral 100
Page 1: ...Clinical guide English ...
