Prothrombin Time, PT

NameProthrombin Time, PT
Tube TypeBlue (Sodium Citrate)
Reporting UnitsPT secs INR ratio
Reference Range13 – 16 s INR 0.9 – 1.1
AvailabilityNDDH (24/7)
Target turnaround time2 hours
Special requirements & notes
Patient preparationN/A
Volume required1 tube (2.7ml) must be full
If delayed transport to lab, store:In refrigerator 2 – 8oC
Factors affecting result interpretationClotted sample, underfilled samples
Time limit for add on test24 Hours
Pathology disciplineHaematology
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Last updated: May 27, 2020