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Figure 1 Arterial pH, arterial carbon dioxide tension (PaCO₂), oxygen saturation (SaO₂), and PaO₂ at PaCO₂ 35, 45, 55, and 40 mm Hg. The lines represent individual patient values with the bold line indicating the mean value. *Adjusted p value for difference between PaCO₂ 35 and 45 mm Hg. Adjusted p value for difference between PaCO₂ 45 and 55 mm Hg. Adjusted p value for difference between PaCO₂ 55 and 40 mm Hg.

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