Table 1.

Lung injury score parameters.

Index	Alveolar hemorrhage and congestion	Alveolar edema	Alveolar or vascular wall neutrophil infiltration or aggregation	Alveolar septum thickening
0	None or very mild lesions
1	Mild lesions (<25% lung involvement)
2	Moderate lesions (25–50% lung involvement)
3	Severe lesions (50–75% lung involvement)
4	Very severe lesions (>75% lung involvement)