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Table 2 Lung injury score (Murray score)

From: The use of neutrophil elastase inhibitor in the treatment of acute lung injury after pneumonectomy

1. Chest roentgenogram score   
  No alveolar consolidation   0
  Alveolar consolidation confined to 1 quadrant   1
  Alveolar consolidation confined to 2 quadrant   2
  Alveolar consolidation confined to 3 quadrant   3
  Alveolar consolidation in all 4 quadrant   4
2. Hypoxemia score   
  PaO2/FiO2 ≥300 0
  PaO2/FiO2 225-299 1
  PaO2/FiO2 175-224 2
  PaO2/FiO2 100-174 3
  PaO2/FiO2 <100 4
3.PEEP score (when ventilated)   
  PEEP ≤5 cm H2O 0
  PEEP 6-8 cm H2O 1
  PEEP 9-11 cm H2O 2
  PEEP 12-14 cm H2O 3
  PEEP ≥15 cm H2O 4
4. Respiratory system compliance score (when available)
  Compliance ≥80 ml/cmH2O 0
  Compliance 60-79 ml/cmH2O 1
  Compliance 40-59 ml/cmH2O 2
  Compliance 20-39 ml/cmH2O 3
  Compliance ≤19 ml/cmH2O 4
  Score
No lung injury 0
Mild to moderate lung injury 0.1-2.5
Severe lung injury (ARDS) >2.5
  1. PaO2/FiO2, arterial oxygen tension to inspired oxygen concentration ratio; PEEP, positive end-expiratory pressure; ARDS, acute respiratory distress syndrome.