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  • Title: The overdosed patient and bleedings with oral anticoagulation.
    Author: Pindur G, Mörsdorf S, Schenk JF, Krischek B, Heinrich W, Wenzel E.
    Journal: Semin Thromb Hemost; 1999; 25(1):85-8. PubMed ID: 10327226.
    Abstract:
    Overdose or bleeding with oral anticoagulation requires gradual antagonization of the drugs. Minor bleedings are most commonly managed by temporarily discontinuing treatment and by giving vitamin K to antagonize the coumarin derivative effects. Major bleedings, in contrast, especially intracranial hemorrhages, require immediate antagonization of anticoagulation. This is also necessary in required major surgery of anticoagulated patients. Instant normalization of hemostasis in such cases is achieved by the administration of clotting factors, in particular prothrombin complex concentrates. The use of fresh frozen plasma, instead, is less useful. The treatment with prothrombin complex concentrates requires a strict risk-benefit estimation and laboratory monitoring is recommended to optimize dosage adjustment. A 2-year follow-up of 45 out-patients receiving phenprocoumon at our center revealed a total of 11 bleeding complications (11.6/100 treatment-years, 10 minor and 1 major bleeding). Discontinuing or reducing oral anticoagulation together with vitamin K were the methods most frequently used to efficiently manage hemorrhages, whereas prothrombin complex concentrates were only used in one case with major bleeding. Oral anticoagulation appeared to be an enhancing factor for an otherwise existing bleeding diathesis rather than a genuine cause for hemorrhages.
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