Table 2.

Lung injury score

Score	Hyaline membranes	Bronchiolar granulocyte infiltration	Bronchiolar epithelial damage
0	No hyaline membranes	No granulocytes	No epithelial damage
1	A few, just detectable membranes	Luminar granulocytes	Single patch of epithelial denudation in a bronchiole
2	Evident membranes in <50% of alveoli	Luminar granulocytes and patches of transluminar granulocyte infiltration	>1 patch of epithelial denudation in a bronchiole
3	Evident membranes in >50% of alveoli	Luminar granulocytes and circumferential transluminar granulocyte infiltration	Denudation of >50% of circumference of the bronchiole