Supplementary features
100
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
2
O.
Adjustable parameters:
Parameter
Setting
Safety Vt (mL)
Adult: Off, 100 to 2500 [Off]
Paed: Off, 50 to 300 [Off]*
PS Max (PS mode)
PS to 50 [PS + 5]
P control max (P(A)CV)
P control to 50 [P c 5]
IPAP Max (S(T), PAC modes)
IPAP to 50 [IPAP + 5]
*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.
Summary of Contents for Astral 100
Page 1: ...Clinical guide English ...
