Table 1

NAECC definition of Acute Lung Injury (ALI) and Acute Respiratory Distress Syndrome (ARDS)[1]

Timing

Oxygenation

Chest Radiograph

Exclusion of cardiogenic pulmonary oedema


ALI

ARDS

Acute

PaO2/FiO2 ≤ 300 mmHg or 40 kPa

PaO2/FiO2 ≤ 200 mmHg or 27 kPa

Bilateral opacities consistent with pulmonary oedema

PAOP ≤ 18 mmHg if measured or no clinical evidence of left atrial hypertension


PaO2/FiO2, arterial partial pressure of oxygen/inspired oxygen fraction; PAOP, pulmonary artery occlusion pressure

Proudfoot et al. BMC Medicine 2011 9:132   doi:10.1186/1741-7015-9-132

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