Dosed INR

Pathology category

Haematology

Code

ID

Referral code

Request form

Standard ( plus yellow dosage book)

Test information

GP patients only to be dosed by the Anticoagulation Team by prior arrangement

Guidelines

Pre-analytical

Lipaemia or jaundiced or haemolysed samples may cause issues with testing

Haemolysed, underfilled or clotted samples will be rejected

Sample transport should be at 4-25C and reach the laboratory ASAP

Please note: samples >24 hours old will be rejected by the laboratory

Reference range

Prophylactic range dependant on clinical condition – should be stated in yellow dosage book

Tube type

Tube type info

2.7ml blue top citrate bottle

1.8ml Paediatric citrate bottle

Special requirements

Minimum volume

1 tube minimum 90% full (to thick black line on bottle) – essential to ensure 1:9 ratio of anticoagulant:blood

Assay frequency

Routine

TAT Inpatient (urgent)

NA

TAT Inpatient

NA

TAT GP/Outpatient

24 hours

Referral lab

local