International Normalised Ratio (Blood)

Testing Laboratories

Counties Manukau | Manukau Health Park
Counties Manukau | Middlemore Hospital

Department

Haematology

Delphic Registration Code (Alpha Code)

W

Test Code (Numeric Code)

1719

Laboratory Handling

Phlebotomy

Tube must be filled up to the "Fill Line"

Registration

W + MHP code if test done in Lab MHP

Sample Stability

24 hours at room temperature.

Synonyms

INR

Turnaround Time

1 hour

Available 24 hours

Specimen Type

  • Plasma

Specimen Requirements

Tube/Container Type:

Preferred
  • Citrate (Light Blue Cap)

Paediatric Specimen Requirements

Tube/Container Type:

Preferred
  • Please refer to Additional Information below
  • Citrate (Light Blue Cap)

Additional Specimen Information

1 mL paediatric tubes are available from Coagulation Laboratory and the tube must be filled up to the "Fill Line"

Last updated: 29/04/2026