International Normalised Ratio

Pathology category

Haematology

Code

INR

Referral code

Request form

Standard

Test information

Guidelines

Pre-analytical

Sample transport should be at 4-25C and reach the laboratory ASAPPlease note: the samples must arrive the same day as collection otherwise they will be rejected by the laboratory

Reference range

Dependent on clinical condition

Tube type

Tube type info

2.7ml blue top citrate1.8ml blue top citrate with white cover (paediatrics)

Special requirements

Minimum volume

1 tube minimum 90% full

Assay frequency

TAT Inpatient (urgent)

TAT Inpatient

4 hours

TAT GP/Outpatient

4 hours

Referral lab

local