Table 1 Reference ranges for newborns and infants used by our laboratory

Glucose, mmol/L

Days 0–1: 2.2–2.7

Usual values in premature newborns with parenteral nutrition: 2.6–9.9

Days 2–30: 2.8–4.4

Creatinine, μmol/L

Days 0–1: 52–86

Day 3: 40–69

Day 7 and above: < 53

Day 2: 47–82

Day 4: 36–66

Sodium, mmol/L

Days 0–30: 133–146

Potassium, mmol/L

Days 0–30: 3.5–6.0

Bicarbonate, mmol/L

22–29

ASAT, UI/L

First year: < 58

ALAT, UI/L

First year: < 41

Creatine kinase, UI/L

Days 0–1: < 712

Days 2–5: < 672

LDH, UI/L

Days 0–14: < 1128

Protein, g/L

Days 0–14: 51–80

Albumin, g/L

Days 0–5: 28–44

Calcium, mmol/L

Days 0–10: 1.80–2.80

Phosphate, mmol/L

Days 0–14: 1.1–2.8

Triglycerides, g/L

First year: 0.52–2.31

Hematocrit, (%)

Days 0–30: 35–65

Neutrophil, /mm3

Day 1: 7200-12,600

Day 3: 1800–7000

Day 2: 4200-9000

>Day 5: 1800-5400

Platelets /mm3

Giga/L

150,000-400,000

150–400

Fibrinogen, g/L

Days 0–6: 1.5–3.7

C-reactive protein, mg/L

Days 0–30: < 5

pH

Days 0–1: 7.29–7.45

Days 2–30: 7.35–7.45

PaCO₂, mmHg

Days 0–30: 35–45

PaO₂, mmHg

Days 0–30: 55–65

Lactate, mmol/L

Days 0–1: 1.5–5.0

Days 2–30 < 2.9

Free carnitine, μmol/L

Premature: 11–63

Full term: 20–52

Common coagulation test

PT, s

Premature: 15–30

Full term: 12–23

PTT, s

Premature: 30–80

Full term: 30–55

Fibrinogen, g/L

Days 0–6: 1.5–3.7

II, %

Premature: 15–50

Full term: 27–64

V, %

Premature: 23–70

Full term: 50–140

VII, %

Premature: 31–62

Full term: 21–65

X, %

Premature: 16–36

Full term: 28–78