Table 1. Blood investigation (Case 1).

Parameter	Value	Normal range
pH	7.27	7.35 - 7.45
pCO2	44 mmHg	35 - 45 mmHg
pO2	95 mmHg	80 - 100 mmHg
Lactate	0.3 mmol/L	0.5 - 2.2 mmol/L
HCO3-	20.2 mmol/L	22 - 26 mmol/L
Base excess	-6.7 mmol/L	-2 to +2 mmol/L
Sodium	137 mmol/L	135 - 145 mmol/L
Potassium	4.96 mmol/L	3.5 - 5.0 mmol/L
Chloride	113 mmol/L	98 - 106 mmol/L