Operation
104
Instructions for Use Fabius MRI SW 3.n
The parameters that can be set for Pressure Sup-
port mode are shown the adjacent table, along with
their adjustment ranges and factory default values.
Pressure Support (PS) can be used to support the
spontaneous breathing of the patient.
If the inspiration flow (Insp Flow) during inspiratory
effort is greater than the set trigger flow (TRIG-
GER), the device supports the patient according to
the Pressure Support setting (
ΔPPS).
The set inspiratory flow (Insp Flow) defines how
fast the
ΔPPS pressure is reached. The end of
inspiration is automatically triggered when reaching
25% of maximum inspiratory flow (Insp Flow) or
after a maximum of 4 s. The value Freq Min
(e.g.,3 bpm (1/min)) is used to set a safety period
(safety period = 1/Freq Min, e.g., 20 s). If no inspi-
ratory effort is detected and the safety period has
expired, the device applies a pressure-controlled
breath with P
INSP = ΔPPS.
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.
Ventilation Parameter
(Pressure Support
mode)
Adjustment
Range
Factory
Default
Value
Support pressure
ΔPPS [cmH2O] ([hPa])
3 to 20, OFF 10
Min frequency for apnea
vent.
Freq Min [bpm] ([1/min])
3 to 20, OFF 3
Trigger Sensitivity
Trigger [L/min]
2 to 15 2
Inspiratory Flow
Insp Flow
[L/min]
10 to 85 30
PEEP [cmH
2O] ([hPa]) 0 to 20 0
1
1
Trigger
Trigger
Insp Flow
Freq Min
Freq Min
25%
25%
P
AW
Flow
max.
4 sec
Apnea
ventilation
Flow Trigger
Flow Trigger
No Trigger
Time
Time
ΔPPS
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