The American-European Consensus Conference definition of ARDS (1994)
| Oxygenation | PaO2/FiO2< 200 (regardless of positive end expiratory pressure level) |
|---|---|
| Chest radiograph | Bilateral infiltration seen on frontal chest radiograph |
| Pulmonary artery occlusion pressure | ⩽ 18 mm Hg when measured or no clinical evidence of left atrial hypertension |