ResMed Astral Series Clinical Manual page 82

Parameter
Trigger
Rise Time (msec)
Ti Min (sec)
Ti Max (sec)
Note: Some default settings are different for Mouthpiece circuit.
Supplementary features:
•
Apnoea response
•
Safety Vt (Tidal Volume)
• Manual breath (Astral 150 only)
•
This graph shows PS mode with Resp. rate enabled with a transition from spontaneous-triggered to
time-triggered breaths. Cycling is constrained within the limits of Ti Min and Ti Max.
•
To allow the patient sufficient time to exhale, Ti cannot exceed two-thirds of the breath period.
(Breath period is equal to 60/Resp. rate).
•
To allow sufficient time to reach the targeted inspiratory pressure, Rise time cannot exceed
two-thirds of Ti Max.
Setting
Double limb circuit:
When Trigger Type is set to Flow:
Adult: 0.5 to 15 [1.0] (L/min)
Paed: 0.5 to 15 [0.5] (L/min)
When Trigger Type is set to Pressure:
Very Low to Very High [Medium]
Single limb circuit:
Very Low to Very High [Medium]
Min, 150 to 900 [200]
0.2 to 4.0 [0.2]
Adult: 0.3 to 4.0 [1.5]
Paed: 0.3 to 4.0 [0.8]
Ventilation modes
English 75