Table 1.

Lung injury scoring system.

Parameters	Scoring per Field
	0	1	2
Neutrophils in the alveolar space	none	1 to 5	>5
Neutrophils in the interstitial space	none	1 to 5	>5
Number of hyalin membrane	none	1	>1
Amount of proteinaceous debris filling in the airspace	none	1	>1
Alveolar septal thickening	<2×	2×–4×	>4×

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