| Abbreviation | Description |
|---|---|
| AUC | Flow/volume area under curve |
| FEV0.5 | Forced Expiratory Volume in half a second |
| FEV1 | Forced Expiratory Volume in one second |
| FEV3 | Forced Expiratory Volume in three seconds |
| FEV6 | Forced Expiratory Volume in six seconds |
| FEV1/FEV6 | Ratio of FEV1 to FEV6 |
| FVC | Forced Vital Capacity |
| FEV3/FVC | Ratio of Forced Expiratory Volume in three seconds to Forced Vital Capacity |
| PEF | Peak Expiratory Flow |
| FEV 1/VC | Ratio between FEV1 and Vital capacity |
| FEF 25 = MEF 25 | Forced Expiratory Flow at 25% expired volume |
| FEF 50 = MEF 50 | Forced Expiratory Flow at 50% expired volume |
| FEF 75 = MEF 75 | Forced Expiratory Flow at 75% expired volume |
| FEF0.5 | Forced Expiratory Flow at 50% expired volume |
| FRC | Functional Residual Capacity |
| TLC | Total Lung Capacity |
| FRC/TLC | Ratio of Functional Residual Capacity to Total Lung Capacity |
| DLCO = TLCO | Carbon Monoxide Diffusing Capacity |
| DL/VA | Ratio of single breath diffusive capacity to alveolar volume |
| RV | Residual Volume |
| RV/TLC | Ratio of Residual Volume to Total Lung Capacity |
| FEF200-1200 | Average Forced Expiratory Flow rate between 200-1200ml |
| FEF2575 = MMEF | Mean Mid Expiratory Flow. The average rate of flow between the 25% and 75% volume point of a FVC manuever |
| MMET | Mean Mid Expiratory Time. The elapsed time between the 25% and 75% volume point of a FVC manuever |
| IVC | Inspiratory Volume Capacity |
| MVV | Maximal Voluntary Ventilation |