Activated Partial Thromboplastin Time (APTT or PTTK) is a blood test that measures the time it takes for blood to clot, focusing on the intrinsic and common coagulation pathways. It is used to evaluate bleeding disorders, monitor patients on heparin therapy, and assess clotting factor deficiencies. Prolonged APTT can indicate issues like hemophilia, liver disease, or the presence of certain antibodies. This test helps in diagnosing clotting disorders and managing anticoagulation therapy.
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