PMC3938440_01
Clinical course of coagulopathy in a patient with acquired factor V deficiency. (A) Prothrombin time (seconds) and aPTT (seconds) during the course of treatment with PSL for the DVT event marked (arrow). (B) Factor V activity (%) and circulating levels of inhibitor (BU/mL) during the course of treatment with PSL for the DVT event marked (arrow).. Abbreviations: aPTT, activated partial thromboplastin time; BU, Bethesda units; DVT, deep vein thrombosis; PSL, prednisolone; PT, prothrombin time.
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The use of prednisone was gradually decreased over several weeks after confirmation of the disappearance of the inhibitor, and was discontinued completely in December 2009 (Figure 1).