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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