What is Prothrombin Time (PT)?
Prothrombin Time is measured as part of a coagulation panel. Your Prothrombin Time (PT) is normal — your blood is clotting in the expected time.
What does a high Prothrombin Time mean?
Your PT is prolonged, meaning blood is taking longer to clot. This can be due to blood thinners (like warfarin), liver issues, or vitamin K deficiency.
If markedly elevated: Your PT is markedly prolonged, which raises bleeding risk and needs prompt review — especially if you take a blood thinner.
Understand your whole report, not just one number
A single value rarely tells the full story — Prothrombin Time is best read alongside the rest of your panel. Paste your values or upload your report and get a plain-English explanation of every marker, with the important results flagged.