Abbreviations used in alphabetical order
| BMRC | British Medical Research Council |
| CB | Chronic bronchitis |
| COPD | Chronic obstructive pulmonary disease |
| TL co | Diffusing capacity for CO |
| FEV1 | Forced expiratory flow in 1 second |
| FVC | Forced vital capacity |
| HR | Heart rate |
| ILO | International Labour Office |
| ITGV | Intrathoracic gas volume |
| IVC | Inspiratory vital capacity |
| P(A-a)O2 | Alveolar-arterial PaO2difference |
| P(a-ET)CO2 | Arterial end-tidal PCO2 difference |
| PaO2 | Partial arterial pressure for O2 |
| PaCO2 | Partial arterial pressure for CO2 |
| % Predicted | Percent of predicted |
| PET CO2 | End-expiratory CO2 |
| PET O2 | End-expiratory O2 |
| PFT | Pulmonary function test |
| RER | Respiratory exchange ratio |
| Rt | Airway resistance |
| RV%TLC | Residual volume in % total lung capacity |
| TLC | Total lung capacity |
| V˙A/Q.. | Ventilation or perfusion |
| V˙CO2 | CO2 output |
| V˙E | Minute ventilation |
| V˙E/V˙O2 | Ventilatory equivalent for O2 |
| V˙E/V˙CO2 | Ventilatory equivalent for CO2 |
| V˙O2 | Oxygen uptake |