Mosby’s Canadian Manual of Diagnostic and Laboratory Tests 2nd Edition Pagana Test Bank

PTT - ANSWER partial prothrombin time 60-70 seconds measures the time it takes your blood to clot. Partial thromboplastin time (PTT) is done to: Find a cause of abnormal bleeding or bruising. Check for low levels of blood clotting factors. The lack of some clotting factors can cause bleeding disorders such as hemophilia. Check for conditions that cause clotting problems. Conditions such as antiphospholipid antibody syndrome or lupus anticoagulant syndrome develop when the immune system makes antibodies that attack blood clotting factors. This can cause the blood to clot easily in veins and arteries. Check to see if the dose of anti-clotting medicine is right. PT - ANSWER Another blood clotting test, called prothrombin time (PT), measures other clotting factors. Partial thromboplastin time and prothrombin time are often done at the same time to check for bleeding problems caused by a problem with the clotting factors. INR - ANSWER INR (international normalized ratio) stands for a way of standardizing the results of prothrombin time tests,