What is the difference between PT test and PTT test?

While both measure how quickly blood clots, they have distinct purposes: The PT test, also known as the PT/INR test, looks at the extrinsic pathway of coagulation (meaning coagulation that occurs after blood escapes a blood vessel). The PTT test looks at the intrinsic pathway of coagulation (meaning coagulation that occurs within a blood vessel).

What does a high PTT number mean?

With the PTT test, the reference range is between 25 and 33 seconds. As with the PT test, a higher PTT number means your blood is taking longer than usual to clot. A lower PTT number means that your blood is clotting faster than normal. There are several reasons why this might occur.

What is a partial thromboplastin time (PTT) test?

The partial thromboplastin time (PTT) test also measures the speed of clotting but differs from the PT test in that it aims to establish how blood clots within a blood vessel (intrinsic pathway). This is based in part on an enzyme called thromboplastin (clotting factor 11) that converts prothrombin into its more active form, called thrombin.

What is PTT in the military?

PTT. Post, Telephone, and Telegraph. Governmental » Military -- and more... #N#. #N#Rate it: PTT. Personal Training Tactics. Governmental » Military. #N#.