Dräger 84 13 050, Operating Instructions Manual

Page: 59 / 68

Gas Supply
The supply gas (O
2
, Air, or mixture as required) pro-
vided by an oxygen blender is cleaned through filter 1
and reduced to a constant pressure with pressure
regulator
2 . The 3/2-way solenoid valve »Insp./Exp.« 3
releases inspiratory flow in the rhythm of the set venti-
lator rate. The electrically operated flow valve
10
controls the flow.
Supply gas is also routed to 3/2-way solenoid valve
»Insp./Exp.« and to demand valve
6 via 3/2-way sole-
noid valve »CMV/CPAP«. System pressure is supplied
to PEEP valve
8 via solenoid valve 7 and is monitored
by pressure sensor 9 .
CMV/SIMV
Inspiration
3/2-way solenoid valve »Insp./Exp.« 3 releases gas flow.
Gas flow is controlled via electrically operated flow
valve
10 and reaches the patient circuit via check valve
13 , humidifier 11 , wye connector 12 , and flow sensor
15 . At the same time, expiratory valve 14 is closed. The
controlled 2/2 way valve 21 prevents the inspiratory gas
from escaping to the mechanical PEEP valve 8 . The
pressure-limiting valve 22 limits the
inspiratory pressure to a maximum value, independent
of the P
max
control unit.
Theory of Operation
Symbols for Pneumatic Components
Theory of Operation
Symbols for Pneumatic Components
Gas Supply
CMV/SIMV
59
Operating InstructionsMicroVent
P
E
∆
P
E
Filter
Check valve
Pressure regulator
Pressure limiting valve, adjustable
Pressure limiting valve with fixed setting
2/2-way valve, pneumatically controlled
3/2-way valve, electrically controlled
Pressure gauge
Pressure sensor
Differential pressure sensor
Expiratory valve, pneumatically-controlled
P
E
E
P
P
E
∆
P
E
PEEP
Paw
Paw
Flow
24
23 22
6
25 26
5
IPPV/
SIMV/CPAP
4
21
13
11
12 15
Patient
14
8 7
10
O
2
AIR
Gasmischer
O
2
/ AIR
1 2
3
9
Insp./Exsp.
27
28
ASB
29
O2/Air
Blender
Press.
Control
CMV
SIMV/CPAP