Safety Volume Settings - ResMed Astral Series Clinical Manual

Supplementary features

Safety volume settings

Astral's Safety Volume feature is an optional adaptive control mechanism that provides volume
assurance to pressure modes (P(A)CV, PS, S(T) and PAC only). It combines the benefits of
pressure-targeted ventilation with the assurance of a volume target.
A target Safety Volume (Safety Vt) can be set and the respective pressure value (PS, P Control or IPAP) is
automatically adjusted to achieve the target.
The maximum inspiratory assistance is constrained by PS Max, P control max or IPAP Max.
The maximum breath-to-breath change in pressure assistance is limited to +/- 2 cmH
Adjustable parameters:
Parameter
Safety Vt (mL)
PS Max (PS mode)
P control max (P(A)CV)
IPAP Max (S(T), PAC modes)
*The International ventilator standard indicates that Paediatric patient type is intended to be used for a patient receiving less
than 300 mL, however Astral permits adjustment of 'Vt' setting parameter up to 500 mL for cases where 'Vt' is set such that it
compensates for leak in the breathing circuit.
WARNING
ResMed does not recommend 500 mL as the upper limit for the pediatric tidal volume use;
however, clinicians may choose this upper limit based on their clinical determination.
100
Setting
Adult: Off, 100 to 2500 [Off]
Paed: Off, 50 to 300 [Off]*
PS to 50 [PS + 5]
P control to 50 [P control + 5]
IPAP to 50 [IPAP + 5]
O.
2