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Table 1 Berlin definition

From: Towards a biological definition of ARDS: are treatable traits the solution?

Timing Within 1 week of a known clinical insult or new or worsening respiratory symptoms
Chest imaging Bilateral opacities—not fully explained by effusions, lobar/lung collapse, or nodules
Origin of edema Respiratory failure not fully explained by cardiac dysfunction or fluid overload
Oxygenation Mild 200 mmHg < PaO2/FiO2 ≤ 300 mmHg with PEEP/CPAP ≥ 5cmH2O
Moderate 100 mmHg < PaO2/FiO2 ≤ 200 mmHg with PEEP ≥ 5cmH2O
Severe PaO2/FiO2 ≤ 100 mmHg with PEEP ≥ 5cmH2O
  1. PEEP positive end expiratory pressure, CPAP continuous positive airway pressure