Table 1 Preoperative investigation results

White blood count

10,200

13,000

4-11,000/mm3

Haemoglobin

13.6

3.8

10-14 g/dL

Haematocrit

40.2%

13.1

35-55%

Platelets

254,000

120,000

150-450,000/mm3

Serum Na+

145

142

135-155 meq/L

Serum K+

4.4

4.1

3.5-5.5 meq/L

Blood urea

3.9

4.3

3.3-6.6 mmol/L

Serum creatinine

0.8

0.9

0.7-1.3 mg/dL

Aspartate aminotransferase

25

36

10-35 μ/L

Alanine aminotransferase

28

40

9-55 μ/L

Prothrombin time

10

20

11-13 s

INR

0.9

1.58

0.8-1.1

Activated partial thromboplastin time

33

64

30-40 s

Serum amylase

50

55

40-140 μ/L

Serum bilirubin

0.9

1.0

<1.2 mg/dL

Arterial blood gas analysis

Not performed

pH 7.20

7.35-7.45

PCO₂ 36

35-45 mmHg

PO₂ 250 (O₂ 15 L/min)

80-100 mmHg (room air)

HCO3^- 16

22-26 meq/L

Base excess -10

-2 to +2

Lactate 6.6

<2mmol/L