Instructions for Use Fabius MRI SW 3.n 107
Operation
The ventilation mode SIMV (synchronized intermit-
tent mandatory ventilation) applies volume-cont-
rolled breaths at a constant inspiratory flow with
defined settings for V
T, TINSP, TIP:TI and PMAX.
Ventilation is applied in synchronization with inspi-
ratory effort of the patient. The frequency Freq defi-
nes the time between the individual volume-
controlled breaths. The synchronization of the bre-
aths is done with a TRIGGER which is activated a
certain amount of time before a new breath is
applied: 5 s for frequencies (Freq) below 12 bpm
(1/min). At higher frequencies, synchronization is
done directly after the preceding expiration. In bet-
ween these mandatory breaths the patient can
breathe spontanously. Mandatory breaths are syn-
chronized with the spontaneous breaths of the pati-
ent. These spontaneous breaths can be supported
with Pressure Support.
The lower pressure limit P
AW low is used for pres-
sure monitoring to detect apneas (disconnection)
and continuous pressure. An alarm is generated
when the pressure curve does not cross the pres-
sure threshold either from above or below.
1
TIP
PLAT
PEAK
PMAX
Trigger
TINSP
f
ΔPPS
PAW low
V
T
TEXP
Insp Flow
Flow Trigger window
max. 5 sec
Flow Trigger
Trigger
P
AW
Flow
Time
Time
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