Red blood cells
(red blood cell indices)Red blood cell indices measure the size, shape, quality, and hemoglobin concentration of red blood cells. They include mean corpuscular volume (MCV), mean corpuscular hemoglobin concentration (MCHC), and mean corpuscular hemoglobin (MCH). These indices can be calculated from your red blood cell count, hematocrit, and hemoglobin concentration.
Red blood cell indices are part of the complete blood count used to assess overall health.
| What is the purpose of this test? | These indices are usually calculated to help diagnose and classify anemias. |
| How to prepare? |
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| Reference values* |
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| Associated tests | The other tests that are part of the complete blood count are performed at the same time. These tests measure different parts and features of your blood, including the following:
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| How is it done? | A blood sample is drawn, usually from a vein in the arm. |
| How long before I get the results? | Results are usually ready in a day. It may take longer to receive your results. |
What does an abnormal test result mean?
High or low red blood cell indices may be caused by anemia. There are different types of anemia, each of which impacts the values of red blood cell indices differently. Carrying out the different tests makes it easier to identify the cause of this health problem.
High mean corpuscular volume (MCV):
- Vitamin B12 or folate deficiency anemia
- Liver disease
- Alcoholism
Low mean corpuscular volume (MCV):
- Iron deficiency anemia
- Thalassemia
High mean corpuscular hemoglobin concentration (MCHC):
- Certain red blood cell disorders (e.g., hereditary spherocytosis)
- Hemolytic anemia
Low mean corpuscular hemoglobin concentration (MCHC):
- Iron deficiency anemia
- Thalassemia
- Hyperglycemia
High mean corpuscular hemoglobin (MCH):
- Vitamin B12 or folate deficiency anemia
- High levels of cholesterol or fat in the blood
Low mean corpuscular hemoglobin (MCH):
- Iron deficiency anemia
- Thalassemia
What you should know before going for this test
When you go in for a blood test or any other medical exam, it's always a good idea to bring a complete list of any prescriptions, over-the-counter medications, or natural health products you're taking. Unless otherwise advised, it's best to take your medications as usual on blood test days. If in doubt, don't hesitate to talk to your healthcare professional.
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The patient information leaflets are provided by Vigilance Santé Inc. This content is for information purposes only and does not in any manner whatsoever replace the opinion or advice of your health care professional. Always consult a health care professional before making a decision about your medication or treatment.