Prothrombin Time Test

Cncpathlab0816 Mar, 2022Health

A prothrombin time (PT) test measures how long it takes for a clot to form in a blood sample. Prothrombin is a protein made by the liver. It is one of several substances known as clotting (coagulation) factors. When you get a cut or other injury that causes bleeding, your clotting factors work together to form a blood clot.