Timing |
respiratory failure within 1 week of a known insult or new
and/or worsening respiratory symptoms |
Origin |
respiratory failure not fully explained by
cardiac function or volume overload
(need objective
criterion such as echocardiography to exclude hydrostatic oedema if no
risk factor is present)
|
Imaging |
bilateral opacities on chest radiograph or CT not fully
explained by effusion, collapse, or nodules |
Oxygenation |
acute onset of hypoxemia defined as PaO2/FiO2
<300 mmHg on at least PEEP
5cmH2O |
|
– PaO2/FiO2 of
201’-300 mmHg is mild ARDS
–
PaO2/FiO2 of 101-200 mmHg is moderate
ARDS
– PaO2/FiO2 ≤100
mmHg is severe ARDS
|