Acute respiratory distress syndrome (ARDS)

Berlin definition 1.Acute onset(< 24hrs) 2. Bilateral opacities 3. No cardiac failure, PAWP<18 mmHg 4. 300 mmHg ≥PaO2/FiO2 >200 mmHg(mild),  200 mmHg ≥PaO2/FiO2 >100 mmHg(moderate),  PaO2/FiO2 ≤100 mmHg(severe), all with PEEP ≥5 cm H2O. Etiology Stage ARDS vs Heart failure pulmonary edema Ventilation strategy