Monitoring; Time Parameters; Volume And Flow Parameters - ResMed Astral Series Clinical Manual

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
Ti
Te
I:E
Resp. rate

Volume and flow parameters

Parameter
Flow
Vti
Vte
Va
MVi
MVe
Peak Inspiratory Flow (PIF) End of
Measured Unintentional
Leak (for intentional leak
circuits)
Updates Units
End of sec
inhalation
End of sec
exhalation
End of breath N/A
End of breath 1/min
Updates Units
Continuous L/min
End of mL
inhalation
End of breath mL
End of breath L/min
End of breath L/min
End of breath L/min
L/min
inhalation
Once per L/min
second
Range Resolution
0 to 10 0.01
0 to 15 0.01
1:9.9 to 9.9:1 0.1
0 to 99 1
Range Resolution
-250 to +250 0.1
0 to 3000 1
0 to 3000 1
0 to 99 0,1
0 to 99 0.1
0 to 99 0.1
0 to 250 0.1
0 to 250 1
Monitoring
Accuracy
±(20 ms + 5%)
±(20 ms + 5%)
±10%
±1/min
Accuracy
±1 L/min or 10%*,
whichever is
greater
±10 mL or 10%,
whichever is
greater
For double limb
circuit:
±10 mL or 10%,
whichever is
greater
For single limb with
intentional leak:
±15 mL or 15%*,
whichever is
greater
±(0.1+15%) L/min*
±15% (VTi ≥
100 mL)
±15% (VTe ≥
100 mL)
±3 L/min or 35%
whichever is
greater
N/A
English 143