Dräger MIcroVent - Theory of Operation; Symbols for Pneumatic Components; Gas Supply; CMV;Simv

Gas Supply
The supply gas (O2, 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 Pmax control unit.
Theory of Operation
Symbols for Pneumatic Components
Theory of OperationSymbols 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
2322
6
25 26
5
IPPV/
SIMV/CPAP
4
21
13
11
12 15
Patient
14
87
10
O2
AIR
Gasmischer
O
2 / AIR
12
3
9
Insp./Exsp.
27
28
ASB
29
O2/Air
Blender
Press.
Control
CMV
SIMV/CPAP