Table 1

Alveolar oxygen partial pressure while breathing air or 100% oxygen at different ambient pressures from 1 to 3 ATA

Total pressure mm Hg

PAO2 on air

PAO2 on 100% O2


ATA


1

760

102

673

2.5

1,900

342

1,813

3

2,280

422

2,193


ATA, atmosphere absolute; PAO2, alveolar oxygen partial pressure.

Bitterman Critical Care 2009 13:205   doi:10.1186/cc7151