Calculating Anest. Gas Concentration

[N2b8]

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How do you calculate carrier gas flow? I know that:

Vapor output= CGF x vapor pressure/barometric pressure - vapor pressure

but where do you get CGF (as opposed to total gas flow)?

Thanks loads!!

 

[Planktonmd]

How do you calculate carrier gas flow? I know that:

Vapor output= CGF x vapor pressure/barometric pressure - vapor pressure

but where do you get CGF (as opposed to total gas flow)?

Thanks loads!!

Simple:
Carrier gas flow = Total gas flow.
The word "carrier gas" refers to the gas mixture that carries the vapor to the patient(O2 + N2O for example), which is in reality the total fresh gas flow.