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    Serum globulin electrophoresis

    Globulin electrophoresis

    Serum globulin electrophoresis is a laboratory test that looks at proteins called globulins in the blood.

    See also:

    • Immunoelectrophoresis - serum
    • Protein electrophoresis - serum

    How the Test is Performed

    A blood sample is needed. For information on how this is done, see: Venipuncture

    The blood sample is sent to a lab. The fluid part of blood (serum) is placed on specially treated paper and exposed to an electric current. The proteins move on the paper to form bands that show the amount of each protein fraction in relation to the other protein fractions.

    How to Prepare for the Test

    Fast for 4 hours before the test. The health care provider may advise you to stop taking drugs that can interfere with the test. Do NOT stop taking any medications without first telling your health care provider.

    Drugs that can affect the measurement of serum proteins include chlorpromazine, corticosteroids, isoniazid, neomycin, phenacemide, salicylates, sulfonamides, and tolbutamide.

    How the Test Will Feel

    When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging sensation. Afterward, there may be some throbbing.

    Why the Test is Performed

    This test is performed to look at globulin proteins in the blood. Identifying the types of globulins can help diagnose certain disorders.

    Globulins are roughly divided into three groups: alpha, beta, and gamma globulins. Gamma globulines include various types of antibodies such as immunoglobulins (Ig) M, G, and A.

    Certain diseases are associated with overproduction of immunoglobulins. For example, Waldenstrom's macroglobulinemia is a cancer of certain white blood cell that is associated with the overproduction IgM antibodies.

    Normal Results

    • Serum globulin: 2.0 to 3.5 g/dL
    • IgM component: 75 to 300 mg/dL
    • IgG component: 650 to 1850 mg/dL
    • IgA component: 90 to 350 mg/dL

    The examples above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples.Talk to your doctor about the meaning of your specific test results.

    What Abnormal Results Mean

    Increased gamma globulin proteins may indicate:

    • Acute infection
    • Chronic inflammatory disease (for example, rheumatoid arthritis and systemic lupus erythematosus)
    • Hyperimmunization
    • Multiple myeloma
    • Waldenstrom's macroglobulinemia

    Risks

    There is very little risk involved with having your blood taken. Veins and arteries vary in size from one patient to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others.

    Other risks associated with having blood drawn are slight but may include:

    • Excessive bleeding
    • Fainting or feeling light-headed
    • Hematoma (blood accumulating under the skin)
    • Infection (a slight risk any time the skin is broken)

    References

    McPherson R. Specific proteins. In: McPherson RA, Pincus MR. Henry's Clinical Diagnosis and Management by Laboratory Methods. 21st ed. Philadelphia, Pa: Saunders; 2006:chap 19.

    Tricot G. Multiple Myeloma. In: Hoffman R, Benz EJ, Shattil SS, et al, eds. Hematology: Basic Principles and Practice. 5th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2008:chap 87.

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          Tests for Serum globulin electrophoresis

          Review Date: 2/8/2012

          Reviewed By: Todd Gersten, MD, Hematology/Oncology, Palm Beach Cancer Institute, West Palm Beach, FL. Review provided by VeriMed Healthcare Network. Also reviewed by Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington; David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

          The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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