INR

A prothrombin time (PT) test measures how many seconds it takes for a clot to form in a blood sample. Since the results of this test can vary with different labs or test methods, your results may be used to create an INR (international normalized ratio). Using this ratio makes it easier for health care providers to compare and better understand results from different labs or test methods.

Source: MedlinePlus, U.S. National Library of Medicine

Normal range

No published reference range from a named lab yet.

What an abnormal result can be associated with

A high result: Prolonged prothrombin time
A low result: Decreased prothrombin time

Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis: only a clinician can interpret your result in context.

details

Sample: Serum or plasma · LOINC
Part of: PT panel
Listed under: Bleeding Disorders · Blood Clots · Hemophilia
Code: LOINC 6301-6
Also known as: Coagulation assay, Clot, Clottable, Fact, Fac

See your own INR Add a lab report and it is drawn against your lab's range, over time. Upload a Blood Test