Interdependence Of Controls; Dynamic Settings Limits; Making Use Of Astral's High Pressure Limit - ResMed Astral Series Clinical Manual

Ventilation modes

Interdependence of controls

Dynamic settings limits

The adjustable range of one setting may be restricted by the value of another. When a dynamic limit of
this kind is reached, a message describing the limitation (interdependence) is displayed on the
Information bar and the Apply button is disabled.
To enable the Apply button, modify one of the conflicting settings. For example in this case, to continue
IPAP must be increased or EPAP decreased.

Making use of Astral's High Pressure limit

Astral's High Pressure limit acts as a traditional High Pressure alarm for volume target therapies and fault
situations. For pressure modes and volume-assured pressure modes, the High Pressure setting acts as
an overall pressure limit, keeping the maximum delivered pressure to 2 cmH
Pressure setting, regardless of the individual control settings.
For example, reducing the High Pressure limit may constrain the following parameters:
• P control
•
PS
•
P control max
•
Max PS
• PEEP
•
IPAP
•
EPAP
•
CPAP
•
Apnoea breath settings
•
Sigh breath Magnitude
•
Manual breath Magnitude
88
O less than the High
2