Table 1 Pre-operative blood results

Sodium

140 mmol/L

Potassium

5.1 mmol/L

Haemoglobin

74 g/L

Haematocrit

0.244 L/L

Mean cell volume

6.6 fL

Mean cell haemoglobin

21.2 pg

Mean cell haemoglobin concentration

303 g/L

Red cell distribution width

37.2 fL

Iron

3.2 μmol/L

Iron saturation

3.8%

Transferrin

3.4 g/L

Ferritin

4 μg/L

Carcinoembryonic antigen

2 μg/L