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    Leucine aminopeptidase - blood

    Serum leucine aminopeptidase

    Leucine aminopeptidase is a type of protein called an enzyme. This enzyme is normally found in cells of the liver and small intestine.

    Serum leucine aminopeptidase is a test that measures how much of the enzyme is in your blood.

    Your urine can also be checked for this substance.

    A blood sample will be taken from your vein.

    You may need to stop taking any medicines that could change the test.

    Drugs that can affect the results include estrogen and progesterone. Never stop taking any of your medicines without first talking to your doctor.

    You may feel a slight pain or sting when the needle is inserted to draw blood. There may be some throbbing at the site afterward.

    Youmay need this test to check for damage to your liver. Too much leucine aminopeptidase is released into your blood when you have a liver tumor or damage to your liver cells.

    This test is not done very often. Other tests, such as gamma glutamyl transpeptidase, are as accurate and easier to get.

    Normal test values are:

    • Male: 80 to 200 U/mL
    • Female: 75 to 185 U/mL

    Note: U/mL = units per milliliter

    Normal value ranges may vary slightly. Some labs use different measurements or may test different specimens. Talk to your doctor about the meaning of your test results.

    • Bile flow from the liver is blocked (cholestasis)
    • Cirrhosis
    • Hepatitis
    • Liver cancer
    • Liver ischemia (reduced blood flow to the liver)
    • Liver necrosis (death of liver tissue)
    • Liver tumor
    • Use of drugs that are toxic to the liver

    Risks

    Veins and arteries vary in size so it may be harder to get a blood sample in one person than another.

    Other slight risks from having blood drawn 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

    Berk P, Korenblat K. Approach to the patient with jaundice or abnormal liver tests. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 149.

    Pratt DS. Liver chemistry and function tests. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 73.

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            Tests for Leucine aminopeptidase - blood

            Review Date: 1/27/2013

            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 A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.

            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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            St. Luke's Hospital - 232 South Woods Mill Road - Chesterfield, MO 63017 Main Number: 314-434-1500 Emergency Dept: 314-205-6990 Patient Billing: 888-924-9200
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