aPTT

The partial thromboplastin time (PTT) or activated partial thromboplastin time (aPTT) is a performance indicator measuring the efficacy of both the intrinsic and the common coagulation pathways. Apart from detecting abnormalities in blood clotting, it is also used to monitor the treatment effects with heparin, a major anticoagulant. Methodology Blood is collected with citrate which arrests coagulation by binding calcium. In order to activate the intrinsic pathway, phospholipid, an activato ...