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Table 1 Laboratory data

From: Premature baby with extreme hyponatraemia (95 mmol per litre): a case report

Variable

Reference range

On presentation

12 h treatment

24 h treatment

4 days treatment

Na (mmol/litre)

135 – 145

94

116

128

134

K (mmol/litre)

3.5 – 5.3

5.2

3.6

4.7

2.8

Creatinine (micromole/litre)

58 – 110

16

24

20

23

Urea (mmol/litre)

2.5 – 7.8

3

1.9

1.5

1.4

Serum osmolality (mosmole/kg)

275 – 295

203

 

258

 

Blood glucose (mmol/litre)

3.0 – 7.7

3.9

6.1

 

4.5

Albumin (g/litre)

35 – 50

34

26

 

21

Calcium, adjusted (mmol/litre)

2.1 – 2.65

2.55

  

2.55

Phosphate (mmol/litre)

0.8 – 1.5

1.45

  

2.46

Chloride (mmol/litre)

95 – 108

68

88

 

108

pH

7.35 – 7.45

7.36

7.28

7.29

7.35

pCO2 (kPa)

4.5 – 6.1

4.1

5.7

6.1

6.2

Bicarbonate (mmol/litre)

24 – 32

16.8

19.5

21.9

25.3

Base excess (mmol/litre)

−2.0 – 2.0

−7.8

−8.2

−5.9

−1.6

Lactate (mmol/litre)

0.4 – 2.2

4.4

  

1.3

Haemoglobin (g/dl)

11.5 – 16.5

15

   

White cell count (x109/litre)

5.0 – 18.0

21.3

   

Neutrophils (x109/litre)

1.5 – 10

10.9

   

Lymphocytes (x109/litre)

3.0 – 10.0

9.8

   

Platelets (x109/litre)

150 – 500

262

   

C-reactive protein (mg/litre)

0.0 – 10.0

2.2

5.5

20.5

3.2

17-OH progesterone (nmol/litre)

0.0 – 20.0

20.9

   

Cortisol (nmol/litre)

not applicable

 

514

  

Aldosterone (nmol/litre)

0.083 – 0.44

   

1.15

Renin (nmol/litre/h)

0.5 – 4.4

   

>28.8

TSH (μU/ml)

0.35 – 5.5

 

2.4

  

Free T3 (pmol/litre)

3.5 – 6.5

 

3.2

  

Free thyroxine (pmol/litre)

7.0 – 17.0

 

11.5