Test BackgroundINR is derived from the PT; it is used to monitor warfarin dosage and will only be reported where a patient is taking warfarin or other dicoumarol drug.
Clinical Indications For the monitoring of vitamin K antagonist therapy (warfarin, phenindione, etc.)
|Therapeutic range dependent on clinical requirement for anticoagulation.|
Sample Required 4.5 mL sodium citrate (pale blue top) adults
1.8 mL sodium citrate (pale blue top) paediatrics
Turnaround Time 4 hours
NotesSpecial handling: avoid prolonged stasis during venepuncture.
Sample must be received by lab within 4 hours of collection.
Please note: samples will be rejected if underfilled or overfilled.