That’s when you might need a prothrombin time test, which measures how quickly your blood clots. It’s also called a PT, pro time, or INR test. Your body makes several different clotting factors.

Clinical and Laboratory Standards Institute (CLSI) recently published an updated document, One-Stage Prothrombin Time ... and medical testing community. CLSI’s unique consensus process ...

test measures the amount of time it takes for your blood plasma to clot. Prothrombin, also known as factor II, is just one of many plasma proteins involved in the clotting process. When you get a ...