Ps Mode - Pressure Support - ResMed Astral Series Clinical Manual

Ventilation modes
Supplementary features:
•
Apnoea response
•
Manual breath (Astral 150 only)
Spontaneous breaths are permitted between mandatory breaths as shown in the figure above. In order
to promote synchrony with the patient's spontaneous efforts, mandatory breaths may be patient
triggered. Such patient triggering will cause some variation in the mandatory ventilation respiratory rate.

PS mode - Pressure support

PS is a pressure target ventilation mode delivering pressure-supported spontaneous breaths:
-
Inspiration is either initiated by the ventilator at a set rate (time-triggered breath), or the patient
(spontaneous-triggered breath). Spontaneous-triggered breaths re-schedule the next
time-triggered breath. Set respiratory rate can be disabled.
-
End of inspiration (switch from inspiration to expiration) is controlled by the patient
(spontaneous-cycled breath).
Parameter
Resp. rate (per min)
PEEP (cmH
O)
2
PS (cmH
O)
2
Cycle (%)
Trigger type
74
Setting
Adult: Off, 2 to 50 [15]
Paed: Off, 5 to 80 [15]
Off, 3 to 20.0 [5.0]
Adult: 2 to 50 [7]
Paed: 2 to 50 [7]
5 to 90, Auto [Auto]
Double limb: Flow/Pressure
Single limb: Pressure