Operation
106
Instructions for use Primus Infinity Empowered SW 4.5n
Volume Mode AutoFlow – Volume AF
(optional)
Volume AF is a pressure controlled ventilation
mode with a guaranteed tidal volume VT and fre-
quency freq. as well as optional synchronization
activation and variable pressure support for sponta-
neous breathing efforts (optional).
Volume AF combines the advantages of pressure
controlled and volume controlled ventilation mode.
The set tidal volume V
T is delivered in a pressure
controlled ventilation mode. The inspiratory pres-
sure automatically adapts to the set tidal volume,
limited by a maximum pressure P
MAX. When venti-
lation with Volume AF is started, the first manda-
tory breath is volume-controlled in order to identify
the necessary pressure level, if it is not known from
a previous ventilation mode.
Primus Infinity Empowered automatically adapts
the inspiratory pressure to the changing lung condi-
tion in steps of max. ±3 mbar per breathing cycle.
The delivery of tidal volume for one breathing cycle
is limited to 130 % of the set tidal volume. If the vol-
ume limitation is active, the inspiratory pressure for
the following breath will be reduced to 75 % of the
target pressure, but limited to a maximum of
15 mbar above PEEP.
Some settable values are limited or mutually exclu-
sive so that specific combinations of therapy set-
tings are not possible, e.g., T
INSP 6.9 s at Freq.
100/min
097
Pressure
P
INSP
Flow
T
SLOPE
TEXP
1/Freq.
T
INSP
Time [s]
Time [s]
Sync.
off
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