Download AV-S Service Manual

DESCRIPTION
3.7.5
Advanced Spontaneous
Breathing Modes
C
3.7.5.1 SIMV
Synchronised Intermittent
Mandatory Ventilation
Guarantees a minimum level of volume.
SIMV allows spontaneous breaths and a
set mandatory breath
SIMV - Spontaneously Breathing
Patient
Inspiratory flow in the Trigger Window
(generated by the patient’s spontaneous
breath) results in a synchronised
mandatory breath at a preset volume and
rate
Pmax
PEEP
0 cmH2O
A
A
B
B
SIMV - Spontaneously Breathing Patient
A = Cycle Time (set from BPM)
B = Trigger Window
C = Spontaneous Breath
D = Trigger
E = Mandatory breath at the set Vt
SIMV - No breathing effort by Patient
If the patient makes no effort to breathe
during a cycle, a mandatory breath, at the
end of the trigger window, will still be
delivered at the preset volume and rate
SIMV - Selection
Select Standby
Select Menu
Select Special Modes
Select SIMV
E
D
D
C
Pmax
PEEP
0 cmH2O
A
A
B
B
SIMV is now on the main screen in
Spontaneous mode.
SIMV - No breathing effort by Patient
A = Cycle Time (set from BPM)
B = Trigger Window
C = Flat Pressure Trace (no breathing effort)
D = Mandatory breath at the end of the Trigger Window at the set Vt
NOTE
1.
SIMV is triggered by flow when
Spirometry is active.
SIMV is triggered by pressure If
Spirometry is disabled.
2.
The trigger window is pre-set to
60% of the BPM cycle time.
3.
The trigger pressure is PEEP
referenced
4.
If the pressure limit and alarm are
activated the inspiratory phase is
terminated
Default Settings - SIMV
SIMV Default Settings
The ventilator will default to the settings
shown in the table, after selecting 'SIMV'.
Note that Vt can be adjusted before SIMV
is confirmed.
Trigger setting defaults to 0.4 L/min, and is
adjustable between 0.2 and 1.0 L/min.
Vt
BPM
Insp. (Ti)
Trigger level
24
Adult
Paediatric
Overall range
600 ml
6
2
0.4 L/min
200 ml
10
1
0.4 L/min
As Volume Mode
As Volume Mode
I:E display box
0.2 to 1.0 L/min