Table 1 Glossary of gas variables and notations
Variables | Definitions | Possible compartment X | Example of gas Y | Possible subcompartment Z |
|---|---|---|---|---|
PXY | Partial pressure of gas Y in a compartment X | \({\overline{\text{E}}}\) = mixed expired | CO2 |  |
ET = end-tidal | O2 |  | ||
A = mean alveolar |  |  | ||
a = arterial |  |  | ||
VXZ | Volume in a compartment X and a subcompartment Z | T = tidal |  | phys = physiological |
D = dead space |  | aw = airway | ||
|  |  | anat = anatomic | ||
|  |  | inst = instrumental | ||
|  |  | alv = alveolar |