Coagulation - PT / INR and aPTT ; Prothrombin time (PT) and activated partial thromboplastin time ( aPTT ) are common initial tests in the evaluation of patients with suspected bleeding disorders The partial thromboplastin time (PTT), also known as the activated partial thromboplastin time (aPTT or APTT), is a blood test that characterizes coagulation of the blood. What is an Activated Partial Thromboplastin Time (APTT ) Test? The aptt test full form is activated partial thromboplastin time test is a crucial medical procedure that measures the time taken for a blood sample to form a clot. It evaluates the activity of the intrinsic and common pathways of blood coagulation. The APTT test procedure involves an activator that is added to the blood sample, accelerating the clotting process and thus, offering a narrower reference range compared to the ... The full form of APTT test is Activated Partial Thromboplastin Time test. It helps detect deficiencies or irregularities in blood clotting abilities that can lead to inappropriate clot formation and bleeding disorders. A reliable lab in India can offer an APTT test at a nominal price.