Lab reference

RDW

CBC

For education. Check every result.

Anatium is a study resource, not medical advice. Nothing here is a diagnosis, a prescription or a substitute for a clinician who has seen the patient. Check every number against a current local protocol before it touches anyone, and never act on a result you cannot reproduce yourself.

Reference range

Range11.5 to 14.5 %

About

How much red cell sizes vary. A raised RDW with a normal MCV can be the earliest sign of a developing deficiency.

When it is low

Usually not clinically significant

When it is high

Anisocytosis: mixed deficiency, post-transfusion, early iron deficiency

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