| Measurement |
Range |
| Anion gap |
12-16 mmol/l |
| Arterial CO2 |
4.7 - 6.0 kPa |
| Mixed venous CO2 |
5.5 - 6.8 kPa |
| Arterial oxygen |
12.0 - 14.5 kPa |
| Mixed venous oxygen |
4.0- 6.0 kPa |
| H^+ ion activity |
36 - 44 nmol/l |
| Arterial pH |
7.35 - 7.45 pH units |
| Bicarbonate arterial- whole blood |
19-24 mmol/l |
| Bicarbonate venous - plasma |
22 - 28 mmol/l |
| Bicarbonate cord blood |
14 - 22 mmol/l |
| Base excess |
+/- 2 mmol/l |
| Carboxyhaemoglobin (non- smoker) |
<2% |
| Carboxyhaemoglobin (smoker) |
3-15% |
| Carboxyhaemoglobin (toxic at) |
>15% |
| Carboxyhaemoglobin (coma at) |
>50% |
