📋 Reference sheet · Blood count and clotting

Low haemoglobin: MCV, reticulocytes and the haemolysis screen

Low haemoglobin. The MCV points the way, and the reticulocytes say whether the marrow is trying.

One page, every threshold with its number and unit. Written and reviewed by practising UK GPs. Last reviewed 29 Jul 2026.

Paediatric values differ

This sheet puts the whole decision on one page: the thresholds that change what you do, each with its number and unit, and the sources each one was checked against.

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Inside the full sheet 🔒 Thresholds, numbers and units 🔒 Sources checked against the guideline

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Related Ocean Article: Assessment & Management of Anaemias · also Sickle Cell Disease, Haematological Cancers (Leukaemia, Lymphoma, Multiple Myeloma), Iron Deficiency Anaemia (IDA), Vitamin B12 and Folate Deficiency, Thalassaemia. Part of the GP reference sheets, result interpretation one page per test or finding.