Table 1.

Severity of ARDS

ARDS SeverityPaO2/FiO2 Ratio (mmHg)PEEP (cmH2O)
Mild200<PaO2/FiO2≤300≥5
Moderate100<PaO2/FiO2≤200 ≥5
Severe100≤PaO2/FiO2≥5
  • Severity is according to the Berlin definition (34). ARDS, acute respiratory distress syndrome; PEEP, positive end-expiratory pressure.