Rivaroxaban


Sunquest Code:RVXBAN  
Epic Code:LAB8193Epic Name:Rivaroxaban
Synonyms:Xarelto
Methodology:Chromogenic
Turnaround Time:Turnaround time is 4-8 hours if received during lab hours (see Associated Link).  With pre-notification, stats are done within 1 hour after receipt in the laboratory.
Special Instructions:See link to Specimen Collection and Processing for Coagulation Specimens
Testing should not be performed on patients receiving the reversal agent Andexxa.  This anti-Xa assay is not suitable for measuring reversal activity of Andexxa® due to high sample dilutions, which cause dissociation of the inhibitor from Andexxa.
Peak levels are drawn 2-4 hours post dosage.
Associated Links:

Specimen Collection and Processing for Coagulation Specimens



Collection Instructions

Specimen:Blood
Optimal Volume:2.7 mL (in 3 mL tube) - filled to fill line on the tube.
Minimum\Peds Volume:1.8 mL (in 2 mL tube) - filled to fill line on tube
Container:Blue Na Citrate, 3.2% - fill to fill line on tube
Collection Instructions:Peak levels are drawn 2-4 hours post dosage.

See link to Specimen Collection and Processing for Coagulation Specimens.
Causes for Rejection:Underfilled tubes, overfilled, clotted specimens or not received or processed and frozen within 4 hours of collection.


Processing and Shipping

Specimen Processing:See link to Specimen Collection and Processing for Coagulation Specimens.
Shipping Instructions:See link to Specimen Collection and Processing for Coagulation Specimens.
Stability:4 hours at room temperature
Test Performed at or Referral Lab Special Coagulation  (UMMC-East Bank)


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