Activated partial thromboplastin time

Activated partial thromboplastin time (aPTT) is a blood test that measures how long it takes for blood to clot. It evaluates the function of several clotting factors involved in the body's natural process to stop bleeding. The test is often used to monitor patients on blood-thinning medications like heparin or to diagnose bleeding or clotting disorders. A longer aPTT indicates slower clotting, which may suggest a bleeding risk or an effect of medication, while a shorter time could suggest increased clotting tendency. The results help doctors assess and manage bleeding or clotting issues effectively.