Thrombin Time
Thrombin time measures how quickly your blood forms a clot in the final step of clotting, when fibrinogen is converted to fibrin. It focuses specifically on that last stage.
Thrombin time helps clinicians look at the final step of clot formation and can flag problems with fibrinogen or the presence of certain medications. It is often used to help interpret other abnormal clotting results. It is generally ordered as part of a broader clotting workup.
A prolonged thrombin time can indicate low or abnormal fibrinogen, or the influence of blood thinners such as heparin or direct thrombin inhibitors. As a clotting time, it signals a possible issue rather than a specific diagnosis. Your clinician will interpret it alongside fibrinogen and other clotting tests.
A short thrombin time is not usually considered clinically significant on its own. Your clinician will interpret it in the context of the full clotting panel.
A thrombin time within the lab's normal range is typical when fibrinogen is normal and no interfering medication is present. Your clinician will interpret your result in the context of the full workup.
Sources
Educational context only, not medical advice or a diagnosis. Reference ranges vary by lab, age and sex; always discuss your results with a clinician.