Turnaround times
The quoted turnaround time is from sample receipt in the laboratory, to results authorisation in the Laboratory Information Management system. The times do not include transport of specimen to the laboratory or the administrative process to print and post/email reports. Service users must allow for transport and reporting time when ordering tests.
Clinical background:
This assay is used to monitor the plasma concentration of the oral direct Anti-Xa inhibitor Rivaroxaban (Xarelto). It is an Anti-Xa assay using specific calibrators.
Specimen container paediatric:
Light blue – sodium citrate
Specimen container adult:
Light blue – sodium citrate
Minimum volume paediatric:
1.3 ml
Minimum volume adult:
2.7mL
Special requirements:
Tube must be correctly filled to line, to ensure correct ratio of blood to anticoagulant, ensure adequate mixing.
Sample stability:
2 hrs
Transport requirements:
Samples should be transported to lab without delay
Freq analysis:
On request
Add on test:
[email protected] (external)
Quality assurance:
UK NEQAS Blood Coagulation
Reference ranges:
Therapeutic levels are dependent on dose and reason for anticoagulation, please discuss with Haematologist. Further information is available in the 2014 BCSH guidelines. Measurement of non-Coumarin anticoagulants and their effects on tests of Haemostasis