Dräger Fabius, Instructions For Use Manual, Page: 107 / 232

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
, T
INSP
, T
IP
:T
I
and P
MAX
.
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.
11
2
1
T
IP
PLAT
PEAK
P
MAX
Trigger
T
INSP
f
Δ
P
PS
P
AW
low
V
T
T
EXP
Insp Flow
Flow Trigger window
max. 5 sec Flow Trigger
Trigger
P
AW
Flow
Time
Time