Operation
114
Instructions for use Primus Infinity Empowered SW 4.5n
Pressure Support Mode (optional)
Press. Support is a pressure-supported ventilation
mode for patients with spontaneous breathing. Syn-
chronization and pressure support of the spontane-
ous breathing efforts are controlled by the sensitiv-
ity of the flow trigger and by the level of
∆
PPS (A).
The rate at which the pressure curve rises is pre-set
by the rise time T
SLOPE (B).
The maximum inspiratory time for a spontaneous
breath varies according to age: 1.5 seconds for pa-
tients aged 4 years and younger, and 4 seconds for
patients over 4 years.
Inspiration is ended as soon as the current inspira-
tion flow drops below 25 % of the inspiratory peak
flow. Any leakage is compensated simultaneously
by means of the actual airway pressure.
099
25 %
25 %
Pressure
Trigger
Trigger indicator
Flow trigger
Time [s]
Time [s]
∆
PPS
Flow
T
SLOPE
1/FreqMIN
Flow trigger
1/Freq
MIN
Apnea ventilation
No trigger
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