<prompt> Raised aPTT is seen in all of the following bleeding disorder except: March 2009Hemophilia AHemophilia BVon-Willebrand diseaseHenoch - Schonlein purpura  <response>: Ans. D: Henoch - Schonlein purpuraThe paial thromboplastin time PTT or activated paial thromboplastin time aPTT APTT is a performance indicator measuring the efficacy of both the intrinsic contact activation pathway and the common coagulation pathways. Apa from detecting abnormalities in blood clotting, it is also used to monitor the treatment effects with heparin, a major anticoagulant. 