Table 1.

Lung Injury Score

Parameter	Score Per Field
	0	1	2
A. Neutrophils in the alveolar space	None	1~5	>5
B. Neutrophils in the interstitial space	None	1~5	>5
C. Hyaline membranes	None	1	>1
D. Proteinaceous debris filling the airspaces	None	1	>1
E. Alveolar septal thickening	<2×	2×~4×	4×

Note: Score =[(20 × A) + (14 × B) + (7 × C) + (7 × D) + (2 × E)]/(number of fields × 100).