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    Bleeding disorders


    Bleeding disorders are a group of conditions in which there is a problem with the body's blood clotting process. These disorders can lead to heavy and prolonged bleeding after an injury. Bleeding can also begin on its own.

    See also:

    • Acquired platelet function defects
    • Congenital platelet function defects
    • Congenital protein C or S deficiency
    • Disseminated intravascular coagulation (DIC)
    • Factor II deficiency
    • Factor V deficiency
    • Factor VII deficiency
    • Factor X deficiency
    • Factor XII deficiency
    • Hemophilia A
    • Hemophilia B
    • Idiopathic thrombocytopenic purpura (ITP)
    • Von Willebrand's disease (types I, II, and III)


    Normal blood clotting involves as many as 20 different plasma proteins, which are known as blood clotting or coagulation factors. These factors act together with other chemicals to form a substance called fibrin that stops bleeding.

    Problems can occur when certain coagulation factors are low or missing. Bleeding problems can range from mild to severe.

    Some bleeding disorders are present at birth and are passed through families (inherited). Others develop from:

    • Illnesses such as vitamin K deficiency or severe liver disease
    • Treatments such as the use of drugs to stop blood clots (anticoagulants) or the long-term use of antibiotics

    Bleeding disorders can also result from having poorly working or too few of the blood cells that promote blood clotting (platelets). These disorders can also be either inherited or picked up (acquired). The side effects of certain drugs often lead to the acquired forms.


    • Bleeding into joints
    • Excessive bruising
    • Heavy bleeding
    • Heavy menstrual bleeding
    • Nosebleeds

    Which problems occur depends on the specific bleeding disorder, and how severe it is.

    Exams and Tests

    • Complete blood count (CBC)
    • Bleeding time
    • Partial thromboplastin time (PTT)
    • Platelet aggregation test
    • Prothrombin time (PT)


    Treatment depends on the type of disorder. It may include:

    • Factor replacement
    • Fresh frozen plasma transfusion
    • Platelet transfusion
    • Other therapies

    Outlook (Prognosis)

    The outcome also depends on the disorder. Most primary bleeding disorders can be managed. Those due to diseases, such as DIC, depend on how well the disease that is causing the bleeding disorder is treated.

    Possible Complications

    • Bleeding in the brain
    • Severe bleeding (usually from the gastrointestinal tract or injuries)

    Other complications can occur, depending on the disorder.

    When to Contact a Medical Professional

    Call your health care provider if you notice any unusual or severe bleeding.


    Prevention depends on the specific disorder.


    Coller BS, Schneiderman PI. Clinical evaluation of hemorrhagic disorders: the bleeding history and differential diagnosis of purpura. In: Hoffman R, Benz EJ Jr., Shattil SJ, et al, eds. Hoffman Hematology: Basic Principles and Practice. 5th ed. Philadelphia, Pa: Churchill Livingstone Elsevier; 2008:chap 121.

    Kessler C. Hemorrhagic disorders: Coagulation factor deficiencies. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 180.


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              Tests for Bleeding disorders

              Review Date: 2/28/2011

              Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by 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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