Dräger Primus Instructions For Use Manual page 66

Ventilation
When changing from automatic ventilation modes to pressure
support made (optional):
The set PEEP, APPS and trigger are adopted.
If APPS and/or trigger were "OFF", the last values used are
adopted in pressure support mode. The configured default
settings are used in all other cases.
Changing from pressure support mode (optional) to automatic
ventilation modes:
The set PEEP, APPs and trigger are adopted. The last values
set are used for the other parameters and the configured
default settings in all other cases.
66
Instructions for Use Primus SW 2.n