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Table 3 Levels of deviation for the different disturbances

From: Analysis of acid–base disorders in an ICU cohort using a computer script

Deviation

Normal value

Value [mean ± SD, most extreme]

Value [mean ± SD, most extreme]

Respiratory acidosis

n = 2753

pCO2 40 mmHg

pH 7.40

60.2 ± 17.2 mmHg

Highest 206 mmHg

pH 7.22 ± 0.099

Lowest 6.49

Respiratory alkalosis

n = 1501

pCO2 40 mmHg

pH 7.40

29.8 ± 3.6 mmHg

Lowest 14 mmHg

pH 7.50 ± 0.033

Highest 7.64

Metabolic acidosis

n = 464

Bicarbonate 24 mmol/L

pH 7.40

14.5 ± 6.9 mmol/L

Lowest 5.4 mmol/L

pH 7.20 ± 0.133

Lowest 6.73

Metabolic alkalosis

n = 46

Bicarbonate 24 mmol/L

pH 7.40

43.0 ± 2.9 mmol/L

Highest 47.4 mmol/L

pH 7.49 ± 0.035

Highest 7.59