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Activated Partial Thromboplastin Time (aPTT or APTT)
Activated Partial Thromboplastin Time (aPTT or APTT): is a medical test that characterizes blood coagulation. Partial thromboplastin time (PTT) measures the overall speed at which blood clots by means of two consecutive series of biochemical reactions known as the "intrinsic" (now referred to as the contact activation pathway) and common coagulation pathways.
