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Below is a selection of reference ranges for various haematological and biochemical investigations. Always consult with your local laboratory, as ranges often differ between labs. This page is intended for educational purposes only and should never be used for clinical decision making.

 



Full blood count¹

Haemoglobin (♂ 130–180 g/ L ) //  (♀ 115–165 g/ L)

White cell count (WCC)

  • Total 3.6–11.0 × 109/ L
  • Neutrophils –  1.8–7.5 × 109/ L
  • Lymphocytes – 1.0–4.0 × 109/ L
  • Monocytes –  0.2–0.8 × 109/ L
  • Eosinophils –  0.1–0.4 × 109/ L
  • Basophils – 0.02–0.10 × 109/ L

Platelet count 140–400 × 109/ L

Red cell count (RCC) (♂ 4.5–6.5 × 1012/ L) // (♀ 3.8–5.8 × 1012/ L)

Haematocrit (♂ 0.4–0.54L/ L) // (♀ 0.37–0.47L/ L)

Mean cell volume (MCV) – 80–100 fL

Mean corpuscular haemoglobin (MCH)  – 27-32 (pg)/cell

Reticulocyte count  0.2 – 2%


Coagulation¹

Prothrombin time (PT) – 10–14 seconds

Activated Partial Thromboplastin Time (APTT) – 24–37 seconds

Fibrinogen – 1.50 – 4.50 g/L


Haematinics¹

Ferritin –  (♂ 25–350 ng/mL) // (♀ 10-300 ng/mL)

Vitamin B12 – 180-1000 pg/mL

Folate – >4.0 ng/mL


Biochemistry ¹

Urea and electrolytes (U&Es)

Na+ – 133–146 mmol/ L

K+ – 3.5–5.3 mmol/ L

Ca2+(adjusted) – 2.2-2.6 mmol/L

Mg2+ – 0.7–1.0 mmol/ L

Urea – 2.5 – 7.8 mmol/L

Creatinine – (♂ 59–104 μmol/ L) // (♀ 45–84 μmol/ L)

 

Liver function tests (LFTs)

Alkaline phosphatase (ALP) – 30–130 U/ L

Alanine aminotransferase  (ALT) (♂ <41 U/ L) // (♀<33 U/ L)

Bilirubin <21 μmol/ L

GGT (♂ <60 U/ L) // (♀<40 U/ L)

Albumin  35–50 g/ L

 

Other

Creatine kinase (CK) – (♂ 40–320 U/ L) // (♀ 25–200 U/ L)

Lactate dehydrogenase (LDH) – 240–480 U/ L

Lactate (plasma) – 0.5 – 2.2 mmol/L

Urate – (♂ 200–430 μmol/ L) // (♀ 140–360 μmol/ L)

Amylase – 28–100 U/ dL


Lipids

Cholesterol – < 5 mmol/L

Triglyceride – 0.55–1.90 mmol/ L

LDL – < 3mmol/L

HDL – > 1 mmol/L

Cholesterol/HDL – < 4


Inflammatory markers

ESR

  • Male – (≤49 years old = 1-7)   (≥50 years old = 2-10)
  • Female – (≤49 years old = 3-9)   (≥50 years old = 5-15)

 

CRP – < 5mg/L


Endocrinology values

TSH – 0.4–4.0 mU/ L ²

Free T4 – 9 – 24 pmol/L

Free T3 – 3.5 – 7.8 pmol/L

 

Growth hormone (random) – (♂< 5 ng/mL) // (♀< 10 ng/mL).

Cortisol (random) – 137 – 429 nmol/ L

 

Testosterone

  • Male <50 – 10-45 nmol/L
  • Male >50 – 6.2-26 nmol/L

Blood glucose ³

Fasting blood glucose – 4.0 to 6.0 mmol/L

Postprandial (2 hours after eating) – up to 7.8 mmol/L

HbA1c – < 42 mmol/mol (6.0%)


Arterial blood gas

pH – 7.35 – 7.45

pO2 – 11 – 13 kPa

pCO2 – 4.7 – 6.0 kPa

HCO3 – 22 – 26 mmol/L

Base Excess – (-2 to +2 mmol/L)


References

1. East Sussex Healthcare – Laboratory – http://www.esht.nhs.uk/EasysiteWeb/getresource.axd?AssetID=375157

2. British Thyroid Foundation – http://www.btf-thyroid.org/information/leaflets/34-thyroid-function-tests-guide

3. Diabetes UK – http://www.diabetes.co.uk/diabetes_care/blood-sugar-level-ranges.html


 

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