2 Theory of Operation
M1046983 04/08
2-49
2.12.3 Mechanical ventilation
Mechanical inspiration
The Bag/Vent switch closes the manual path (
V
). Pilot pressure (
P
) closes the
exhalation valve.
Drive gas (
D
) pushes down on the bellows. Gas flows from the bellows (
1
), through the
absorber (
2
), and through a unidirectional valve (inspiratory check valve) to the patient
(
3
).
During inspiration, fresh gas flows into the inspiratory limb, upstream of the inspiratory
check valve.
Figure 2-36 • Mechanical inspiration
AP
Airway Pressure
D
Drive gas
FG
Fresh Gas
P
Pilot pressure
V
Bag/Vent switch to Vent
1
Flow to absorber
2
Flow from absorber
3
Inspiratory flow
FG
AP
AB.82.029
1
V
2
3
D
D
P
Содержание Datex-Ohmeda Aisys Carestation
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