RBC indices

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The MCV reflects the size of red blood cells. The MCH and MCHC reflect the hemoglobin content of red blood cells. These RBC measures are used to diagnose types of anemia.

Anemias are defined based on cell size (MCV) and amount of Hgb (MCH).

• MCV less than lower limit of normal: microcytic anemia
• MCV within normal range: normocytic anemia
• MCV greater than upper limit of normal: macrocytic anemia
• MCH less than lower limit of normal: hypochromic anemia
• MCH within normal range: normochromic anemia
• MCH greater than upper limit of normal: hyperchromic anemia

Review Date: 02/09/2010
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org).

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