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Coagulation Screening Tests, Fibrinogen Assay, Anticoagulant control

Category Haematology
Reporting frequency Urgent 60-90 minutes (dependent on extent of tests required). Routine 4 hours.

Collection conditions

Samples taken from lines may be contaminated with heparin which could affect results. Samples must be filled to mark, taken with minimum stasis and analysed within 4 hours after venipuncture. May be added to samples less than 4 hours old

Additional information

Use multidisciplinary request form

Reference range information:
INR 0.8 – 1.1
INR (Warfarin) See anticoagulant guides
APTTR 0.85 – 1.15
APTT (unfractionated heparin iv) 1.5 – 3.5
Fibrogen 1.6 – 4.8 g/L
Anti-Xa (low molecular weight or unfractionated heparin) Refer to haematologist

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