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    Hemoglobin Electrophoresis

    Results

    A hemoglobin electrophoresis test is a blood test done to check the different types of hemoglobin in the blood. Results are ready in several days.

    Normal

    The normal values listed here-called a reference range-are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.

    Hemoglobin electrophoresis 1

    Hemoglobin A1:

    96.5%-98.5% of total hemoglobin or 0.96-0.985 mass fraction

    Hemoglobin A2:

    1.5%-3.5% of total hemoglobin or 0.015-0.035 mass fraction

    Hemoglobin F:

    0%-1% of total hemoglobin or 0-0.01 mass fraction

    Abnormal hemoglobin types:

    None

    High and low values

    • Higher-than-normal amounts of both hemoglobin A2 and hemoglobin F may mean a mild form of thalassemia is present. A very low level of hemoglobin A and a high level of hemoglobin F may mean a more severe form of thalassemia. High levels of hemoglobin F may be seen in a rare condition called hereditary persistence of fetal hemoglobin.
    • Hemoglobin S in moderate amounts can mean that sickle cell trait is present. Hemoglobin S in high amounts means sickle cell disease.
    • Hemoglobin C in low amounts can mean that hemoglobin C trait is present. Hemoglobin C in high amounts means hemoglobin C disease, which causes anemia and an enlarged spleen.
    • Hemoglobin types S and C mean hemoglobin S-C disease, which causes a mild or moderate form of sickle cell disease.
    • Hemoglobin E in low amounts means the presence of hemoglobin E trait. Hemoglobin E in high amounts means hemoglobin E disease, which causes anemia and smaller-than-normal red blood cells.
    • Hemoglobin types other than S, C, D, and E are rare. But over 350 types of abnormal hemoglobin have been found.1

    What Affects the Test

    Reasons you may not be able to have the test or why the results may not be helpful include:

    • Having a blood transfusion in the past 3 months.
    • Having iron deficiency anemia. This can cause falsely low results for hemoglobin A2.

    WebMD Medical Reference from Healthwise

    Last Updated: September 09, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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