| CPIS | 0 | 1 | 2 |
|---|---|---|---|
| Tracheal secretion | Rare | Abundant | Abundant & purulent |
| Chest X-ray infiltrate | No infiltrate | Diffuse | Localized |
| Temperature ºC | > 36.5 and < 38.4 | > 38.5 and < 38.9 | > 39 or < 36 |
| Leucocytic count per mm3 | > 4000and < 11000 | < 4000 or > 11000 | < 4000 or > 11000 +band form > 500 |
| Hypoxic index PaO2/FIO2 mmHg | >240 or ARDS | -- | < 240 and no evidence of ARDS |
| Microbiology | Negative | -- | Positive |