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Anesthesia machine....proportioning system


  1. Proportioning Systems

    1. a)  Limit N2O flow to 3 times O2 flow
    2. b)  Link vs. pressure operated systems


    • Link system: mechanically turns down N2O needle valve if O2 flow reduced
    - N2O flow will NOT return to initial value if O2 flow increased

    • Pressure system: pneumatically decreases N2O flow if O2 flow reduced
    - N2O flow will return to initial value if O2 flow increased 

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