MedSchool: Ace Your OSCEsThe Medical Company
GET - On the App Store
Full Blood Count

Serum Haemoglobin

February 15th, 2021


Haemoglobin is a tetrameric protein found within red blood cells, composed of a haem (iron-containing) molecule, two alpha and two beta globin subunits.
Haemoglobin transports oxygen and other molecules in the blood.
    • Normal Range

    • Males: 130 - 180 g/L
    • Females: 115 - 165 g/L
  • Interpretation

  • Reduced serum haemoglobin - suggests anaemia
  • Increased serum haemoglobin - suggests relative or absolute erythrocytosis

Haematocrit or Haemoglobin?

Haematocrit and haemoglobin values are often used interchangeably. The haematocrit : haemoglobin ratio is often stable and usually  approximately 0.3.
Serum haemoglobin concentration is a better marker of anaemia because it more directly reflects the blood's ability to transport oxygen.
Discrepancies in the haematocrit : haemoglobin ratio occur most commonly in the presence of abnormal red blood cell morphology, and the blood smear should be examined when this is the case.
Next Page
Want more info like this?
  • Your electronic clinical medicine handbook
  • Guides to help pass your exams
  • Tools every medical student needs
  • Quick diagrams to have the answers, fast
  • Quizzes to test your knowledge
Sign Up Now

Snapshot: Initialising...