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Selecting SIMV mode
In order to prevent the mechanical mandatory ventilation
stroke from being applied during the expiratory
spontaneous breathing phase, a special trigger ensures
that the mandatory ventilation stroke is controlled by the
patient and consequently synchronized with spontaneous
breathing (this is described in detail on page 180).
PEEP is not active in SIMV mode!
After switching on, the ventilation parameters program-
med upon delivery are active in SIMV mode. They can be
changed by DrägerService on request.
The ventilation parameters of the preceding mode remain
active when changing from IPPV to SIMV mode and vice
versa!
Settings upon delivery of new apparatus:
V
Tidal volume
T
f
IMV frequency
IMV
P
Maximum ventilation pressure
max
T
:T
Ratio of inspiratory pause
IP
I
time/inspiration time
T
:T
Inspiration/expiration time ratio
I
IE
If the ventilation frequency is equal to or greater than
6 breaths per minute in »SIMV mode«, the IPPV alarm
limits become active and the alarm mode »IPPV alarm
limits« is automatically displayed on the system screen.
If the ventilation frequency is less than 6 breaths per
minute in »SIMV mode«, special SIMV alarm limits
become active and the advisory message »SIMV alarm
limits« flashes in the status field of the system screen for
five seconds. This message does not require confirma-
tion (see page 81).
When setting frequencies of more than 6 per minute,
the system automatically reverts to the IPPV alarm limits
and indicates this on the system screen.
The ventilation parameters are adjusted in the same way
as in IPPV mode:
1 Press the »SIMV« key.
2 Display in dialogue field:
SIMV Mode ?
3 Press rotary control to confirm -
ventilation starts -
the parameters P
, V
max
movement are displayed on the ventilator -
the system screen is also started and the alarm limits
for SIMV are activated.
To adapt the alarm limits automatically to the ventila-
tion mode, see »Alarm concept« on page 78.
0.6 L
12 per min.
25 mbar
10 %
1:1.7
, f
, PEEP and piston
T
IMV
Warning:
IPPV alarm limits
standard screen 1- adults
1. ECG I
HR/Puls
1mV
Pulsdef.
iBP1 160
NiBP sys
SpO
et CO
in CO
0
CO
AMV
40
2
Fi O
30
Fi SEV
PAW
0
iBP 1 sys
PAW
iBP 2 mit
20
ST
T1
T2
0
Fi O
Vol %
MV
l/min
2
29
10.2
∆ O
Freq 12
V
0.60
2 --
T
11:59
Select the required limits and confirm !
06.12.98
00:00
Ventilator with PCV
MAN
SPONT
IPPV
1
P
max
SIMV
PCV
V
T
f
IPPV
P
PCV
Ventilator without PCV
Anaesthesia ventilation
SIMV
Caution:
Advisory:
HR/Pulse
(ECG)
limits
72
1/min
auto set
72
50
120
pat. alarm.
pulse def. 4
ST + 0.05
4
5
et CO2
MV
Peak
auto set
122
80 160
33
10.2
19
vent. al.
92
91
--
2
Freq.
VT
PEEP
33
30
50
alarm
2
12
0.81
1
--
5
info
2
6.2
3.0 12.0
etCO
mmHg
2
29
20
--
2
33
0.8
--
3.4
9
8
40
125
80
167
31
0
8
Peak
mbar
PEEP
timer
± 0.10
-0.05
32
3
start
36.8
--
--
37.5
--
--
Plat 18
Mean 6
HR/Pulse
SpO2
Art (1)
SpO
%
2
99
79 99 -- / --
36.8
T1
1/min
%
mmHg
37.5
T2
TEST
SIMV-Mode ?
T
IP
:T
I
f
T
:T
2
PEEP
IMV
I
E
Flow
3
1
SIMV
SIMV Mode ?
2
3
°C
°C
35
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