aPTT
Also known as: Partial Thromboplastin Time; PTT; Kaolin Cephalin Clotting Time (KCCT)
Formal name: Activated Partial Thromboplastin Time (aPTT)
Related tests: Prothrombin Time (PT), Fibrinogen, Thrombin Time, Lupus Inhibitor, Activated Clotting Time (ACT) , von Willebrand screen, Coagulation Factors, Platelet Count
At a Glance
Why Get Tested?
As part of an investigation of a bleeding or thrombotic episode. To help evaluate your risk of excessive bleeding prior to a surgical procedure. To monitor heparin anticoagulant therapy
When to Get Tested?
When you have unexplained bleeding or thrombosis (a blood clot). When you are on heparin anticoagulant therapy. Sometimes as part of a pre-surgical screen
Sample Required?
A blood sample is taken by needle from a vein in the arm
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