INR (International Normalised Ratio)

Test/Investigation

INR (International Normalised Ratio)

Site(s) or Laboratory offering Test/Investigation

JPUH, NNUH, QEH

Indications

Warfarin (coumarin anticoagulant) monitoring

Comments/Precautions

Sample should be filled to the mark in the tube. Under or overfilled samples will be rejected Please provide details of anticoagulants; Therapeutic range dependant on treatment indication.

Ideal sample age for accurate results/Maximum acceptable sample age (at the time of analysis)

Upto 8 hours (Ideally 4 hours); Max 24 hours

Sample type

Citrate (1:9)

Turnaround times (TAT) Urgent/Routine/GP or OPD

1 hour/4 hours/24 hours

If UKAS Accredited Test indicate at which site

Yes: NNUH & QEH