Activated Partial Thromboplastin Time (APTT)

The Activated Partial Thromboplastin Time (APTT) test is a vital to evaluate how well the coagulation pathways are functioning to form blood clots. By measuring the number of seconds it takes for a clot to form in a plasma sample after specific reagents are added, clinicians can identify potential deficiencies or inhibitors in clotting factors. This test is indispensable for investigating unexplained bleeding or bruising, screening patients before major surgery to prevent intraoperative hemorrhage, and monitoring the effectiveness of unfractionated heparin therapy.