Table 2

Oxygenation variables after one, two and four hours of mechanical ventilation

Time (hours)

PaO2 (mmHg)

PaCO2 (mmHg)

pH

BE


1

568.6 ± 23.1

31.0 ± 2.8

7.46 ± 0.02

-0.8 ± 1.4

2

509.7 ± 22.0

35.4 ± 2.3

7.42 ± 0.02

-1.5 ± 0.6

4

493.4 ± 24.9

45.4 ± 4.3

7.32 ± 0.03

-4.0 ± 0.9


Data are presented as mean ± standard error of the mean. BE = base excess; PaCO2 = partial pressure of arterial carbon dioxide; PaO2 = partial pressure of arterial oxygen.

Hegeman et al. Critical Care 2009 13:R182   doi:10.1186/cc8168

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