Prothrombin time (PT) factor substitution immediately after 1:4 addition of normal plasma

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.
details
Sample
Serum or plasma · LOINC
Code
LOINC 53230-9 · s
Also known as
Coagulation assay, Clot, Clottable, Control, Fact
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