Rivaroxaban, Apixaban, Fondaparinux, Edoxaban and Dabigatran assays


Alternative names, keywords


Samples required

Trisodium citrate blood (blue cap, 3.5 mL tube) taken with minimal stasis, filled to the line. Smaller tubes are available for paediatric samples.

This test can only be added to a request within 2 hours of sample collection.

Test indications

It is essential to state the type of heparin. Please provide information on time of last dose.

Reference range

For Rivaroxaban, Apixaban, Fondaparinux, Edoxaban and Dabigatran the reference intervals are determined by several factors including the time of administration or last dose taken, the dose itself, renal function and indication for anticoagulation. The requestor is typically referred to a Consultant Haematologist or published data (some of which is limited for the newer drugs) for interpretation.

Turnaround time

The laboratory will try to turn around within 1 day if urgent, although there may sometimes be a delay as this is not a routine test.


Haematology (Coagulation)