What is the normal prothrombin time (PT) range?

The normal prothrombin time (PT) range is typically 10 to 13 seconds. Prothrombin time is a blood test that measures how long it takes for blood to clot, which is essential for assessing the coagulation status of a patient. This test is particularly important in monitoring patients on anticoagulant therapy, such as warfarin, and it evaluates the extrinsic pathway of coagulation.

When the PT is within the normal range, it indicates that the proteins involved in blood clotting are functioning properly. Values outside this range might suggest bleeding disorders or the need for adjustments in anticoagulation medication. The standard reference range for PT can differ slightly depending on the laboratory and its specific methods, but in general clinical practice, 10 to 13 seconds is widely accepted as the normal range.