Prothrombin Time

MeasuredUseful

How long your blood takes to clot through one pathway.

Used before surgery and to monitor blood thinners, not to screen well adults.

Calculated from this result

Once a lab has this measurement, these lines cost it nothing to add.

How we rate it — Useful

Worth doing for a specific reason — a risk factor, a symptom, an age group.

This rating and the description above were written against published screening guidelines by someone who is not a clinician, and are awaiting review by one. We would rather say that than imply an authority we do not have.

Check-ups that include it

None of the health check-up packages we track include this test.

Also sold as

Every one of these names refers to this same test. Resolving them to one canonical entry is what makes an honest comparison possible.

mean normal prothrombin time · prothrombin time · pt

Information here is for comparing packages, not for diagnosing yourself. Talk to a doctor about which tests you actually need.