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    Lupus anticoagulants

    Lupus anticoagulants are antibodies against substances in the lining of cells. These substances prevent blood clotting in a test tube. They are called phospholipids.

    Persons with these antibodies may have an abnormally high risk of blood clotting.

    Causes

    Most often lupus anticoagulants are found in persons with diseases such as systemic lupus erythematosus (SLE).

    Lupus anticoagulants may also occur if:

    • You take certain medicines, such as phenothiazines, phenytoin, hydralazine, quinine, and the antibiotic amoxicillin.

    You have such conditions such as

    • Inflammatory bowel disease (Crohn's disease and ulcerative colitis), infections, and certain kinds of tumors.

    Some people have no risk factors for this condition.

    Symptoms

    You may not have any symptoms. Symptoms that may occur include:

    • Blood clots in the legs or the lungs as well as stroke or heart attack
    • Recurrent miscarriages

    Exams and Tests

    The following tests may be done:

    • Partial thromboplastin time (PTT)
    • Russell viper venom time
    • Thromboplastin inhibition test

    Treatment

    Often, you will not need treatment if you do not have symptoms or if you have never had a blood clot in the past.

    Take the following steps to help prevent blood clots from forming:

    • Avoid most birth control pills or hormone treatments for menopause (women).
    • Do not smoke or use other tobacco products.
    • Get up and move around during long plane flights or other times when you have to sit or lie down for extended periods.
    • movie your ankles up and down when you can't move around.

    Your doctor may prescribe blood thinning medicines (such as heparin and warfarin) to help prevent blood clots:

    • After surgery
    • After a bone fracture
    • With active cancer
    • When you need to set or lie down for long periods of time, such as during a hospital stay or recovering at home.

    Outlook (Prognosis)

    Most of the time, outcome is good with proper treatment. Some people may have blood clots that are hard to control with treatments. Symptoms may recur.

    When to Contact a Medical Professional

    Call your health care provider if you notice symptoms of a blood clot such as:

    • Swelling or redness in the leg
    • Shortness of breath
    • Pain, numbness and pale skin color in an arm or leg.

    References

    Harris ED, Budd RC, Genovese MC, Firestein GS, Sargent JS, Sledge CB. Kelley's Textbook of Rheumatology. 7th ed. St. Louis, Mo: WB Saunders; 2005.

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    • Systemic lupus erythemat...

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    • Blood clots

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      • Systemic lupus erythemat...

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      • Blood clots

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          Tests for Lupus anticoagulants

            Review Date: 1/22/2013

            Reviewed By: Todd Gersten, MD, Hematology/Oncology, Palm Beach Cancer Institute, West Palm Beach, FL. Review provided by VeriMed Healthcare Network.Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, 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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