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Table 2 Arterial blood gas analysis and electrolytes at the first diagnosis of metabolic acidosis

From: Incidence and management of metabolic acidosis with sodium bicarbonate in the ICU: An international observational study

 

No SB (N = 180)

SB (N = 180)

p Value

pH

7.26 [7.21, 7.28]

7.19 [7.11, 7.25]

 < 0.001

PaO2, mmHg

110.5 [84.8, 162.5]

118.2 [84.6, 203.3]

0.25

PaO2/FiO2

277.1 [187.0, 377.9]

282.0 [148.2, 418.1]

0.86

PaCO2, mmHg

43.0 [37.5, 48.0]

38.6 [29.3, 45.4]

 < 0.001

HCO3, mEq/L

18.6 [16.0, 20.9]

14.4 [10.4, 18.0]

 < 0.001

Base Excess, mEq/L

− 8.0 [− 10.9, − 5.9]

− 12.6 [− 18.1, − 9.1]

 < 0.001

SID, mEq/L

30.7 [27.5, 33.8]

28.0 [24.1, 32.0]

0.001

 Sodium, mEq/L

137.0 [135.0, 139.3]

137.0 [134.0, 140.5]

0.98

 Potassium, mEq/L

4.3 [3.8, 4.9]

4.4 [3.8, 5.0]

0.38

 Chloride, mEq/L

109.0 [105.0, 112.8]

108.0 [103.0, 113.0]

0.50

 Lactate, mmol/L

2.5 [1.4, 4.5]

4.4 [1.5, 9.3]

0.001

 Ionized Calcium, mmol/L

1.1 [1.1, 1.2]

1.1 [1.0, 1.2]

0.73

  1. SB denotes sodium bicarbonate; SID, strong ion difference = Sodium + Potassium + Ionized calcium–Chloride–Lactate
  2. pH, PaO2, PaCO2, HCO3, Base Excess, and lactate were only measured for arterial blood samples
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