| Timing | Oxygenation | Chest Radiograph | Exclusion of cardiogenic pulmonary oedema |
---|---|---|---|---|
ALI ARDS | Acute | PaO2/FiO2 ≤ 300 mmHg or 40 kPa PaO2/FiO2 ≤ 200 mmHg or 27 kPa | Bilateral opacities consistent with pulmonary oedema | PAOP ≤ 18 mmHg if measured or no clinical evidence of left atrial hypertension |