Gas Flow Theory of Operation
1 - 28 046-001141-00 A5/A3™ Service Manual
1.3.4.11 Anesthetic Ventilator
The anesthetic ventilator provides drive gas for the patient to breathe. O2 from the gas supply inlet
assembly enters the anesthetic ventilator and is outputted in three pathways: drive gas entering the
breathing system, drive gas discharged through the AGSS outlet, and drive gas discharged through
the PEEP outlet. The ventilator controls drive gas flow to prevent excessively high pressure inside the
pneumatic circuit from injuring the patient. The following picture shows the gas flow direction and
the components of the anesthetic ventilator.
FIGURE 1-18 Anesthetic Ventilator
The following is the pneumatic circuit diagram of the anesthetic ventilator.
FIGURE 1-19 Anesthetic Ventilator - Pneumatic Circuit Diagram
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