2 Theory of Operation
M1046983 04/08
2-47
Manual expiration
The Bag/Vent switch keeps the ventilator path closed (
B
).
Gas flows from the patient (
4
), through a unidirectional valve (expiratory check valve),
and into the bag (
5
).
During exhalation, fresh gas flows backwards through the absorber (
FG
) into the
expiratory limb, downstream of the expiratory check valve.
For machines that are plumbed to return sample gas to the breathing system, the
returned gas (
SGR
) enters the breathing system after the expiratory check valve.
Figure 2-34 • Flow during manual expiration
AP
Airway Pressure
B
Bag/Vent switch to Bag
FG
Fresh Gas
SGR
Sample Gas Return
4
Expiratory flow
5
Flow to bag
FG
AP
5
FG
AB.82.027
SGR
4
5
B
Summary of Contents for Datex-Ohmeda Aisys Carestation
Page 1: ...Aisys Anesthesia Machine Technical Reference Manual ...
Page 16: ...Notes xiv 04 08 M1046983 ...
Page 32: ...Notes 1 16 04 08 M1046983 ...
Page 158: ...Notes 5 20 04 08 M1046983 ...
Page 288: ...Notes 7 106 04 08 M1046983 ...
Page 325: ...9 Repair Procedures M1046983 04 08 9 29 The rear inverter A B C ...
Page 356: ...Notes 9 60 04 08 M1046983 ...
Page 401: ...10 Illustrated Parts M1046983 04 08 10 45 14 1 2 3 6 5 4 5 8 7 15 16 18 17 10 9 11 12 13 or ...
Page 452: ...Notes 10 96 04 08 M1046983 ...
Page 466: ...11 14 04 08 M1046983 Notes ...
Page 470: ...Aisys 12 4 04 08 M1046983 12 3 System Schematics 12 3 1 Power Schematic ...
Page 478: ...Aisys 12 12 04 08 M1046983 12 6 3 Tools Transfer Logs ...
Page 497: ......