Monitoring
English 143
Monitoring
This section specifies the monitored parameters of the Astral device. Monitored therapy parameters are
only displayed during ventilation. Other parameters (eg, battery charge level and oximetry data) are
monitored even when not ventilating.
The Astral device monitors the following parameters:
Time parameters
Parameter
Updates
Units
Range
Resolution
Accuracy
Ti
End of
inhalation
sec
0 to 10
0.01
±(20 ms + 5%)
Te
End of
exhalation
sec
0 to 15
0.01
±(20 ms + 5%)
I:E
End of breath
N/A
1:9.9 to 9.9:1 0.1
±10%
Resp. rate
End of breath
1/min
0 to 99
1
±1/min
Volume and flow parameters
Parameter
Updates
Units
Range
Resolution
Accuracy
Flow
Continuous
L/min
-250 to +250 0.1
±1 L/min or 10%*,
whichever is
greater
Vti
End of
inhalation
mL
0 to 3000
1
±10 mL or 10%,
whichever is
greater
Vte
End of breath
mL
0 to 3000
1
For double limb
circuit:
±10 mL or 10%,
whichever is
greater
For single limb with
intentional leak:
±15 mL or 15%*,
whichever is
greater
Va
End of breath
L/min
0 to 99
0,1
±(0.1+15%) L/min*
MVi
End of breath
L/min
0 to 99
0.1
±15% (VTi
≥
100 mL)
MVe
End of breath
L/min
0 to 99
0.1
±15% (VTe
≥
100 mL)
Peak Inspiratory Flow (PIF) End of
inhalation
L/min
0 to 250
0.1
±3 L/min or 35%
whichever is
greater
Measured Unintentional
Leak (for intentional leak
circuits)
Once per
second
L/min
0 to 250
1
N/A
Summary of Contents for Astral 100
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