Aged <55 yrs |
Smoking history <20 pack-yrs |
Clear chest radiograph |
Pa,O2 >39.9 kPa on an FI,O2 of 100% and PEEP of 5 cmH2O |
No aspiration/sepsis |
No significant chest trauma |
Absence of purulent secretion at bronchoscopy |
Absence of organism on Gram stain and cultures |
Length of intubation <48 h |
No previous cardiopulmonary surgery |
Pa,O2: arterial oxygen tension
FI,O2: inspiratory oxygen fraction
PEEP: positive end-expiratory pressure