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Table 1 Acute lung injury pathology scoring criteria

From: Protective effect of Xuebijing injection on paraquat-induced pulmonary injury via down-regulating the expression of p38 MAPK in rats

Score Alveolar septa Alveolar haemorrhage Intra-alveolar fibrin Intra-alveolar infiltrations per field
0 All are thin and delicate No haemorrhage No intra-alveolar fibrin Less than 5 intra-alveolar cells
1 Congested alveolar septa in less than 1/3 of the field Erythrocytes per alveolus in 1 to 5 alveoli Fibrin strands in less than 1/3 of the field 5 to 10 intra-alveolar cells
2 Congested alveolar septa in 1/3 to 2/3 of the field At least 5 erythrocytes per alveolus in 5 to 10 alveoli Fibrin strands in 1/3 to 2/3 of the field 10 to 20 intra-alveolar cells
3 Congested alveolar septa in greater than 2/3 of the field At least 5 erythrocytes per alveolus in more than 10 alveoli Fibrin strands in greater than 2/3 of the field More than 20 intra-alveolar cells