Figure 1.

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.