| Abbreviation | Definition |
| | |
| AFB | acid-fast bacilli |
| ARDS | adult respiratory distress syndrome |
| CF | cystic fibrosis |
| COPD | chronic obstructive pulmonary disease |
| CT | computed tomography |
| CXR | chest x-ray |
| CO2 | carbon dioxide |
| flu | influenza |
| LLL | left lower lobe |
| LTB | laryngotracheobronchitis |
| LUL | left upper lobe |
| O2 | oxygen |
| OSA | obstructive sleep apnea |
| PCP | Pneumocystis carinii pneumonia |
| PE | pulmonary embolism |
| PFTs | pulmonary function tests |
| PSG | polysomnography |
| RLL | right lower lobe |
| RML | right middle lobe |
| RUL | right upper lobe |
| TB | tuberculosis |
| URI | upper respiratory infection |
| VPS | ventilation-perfusion scanning |
