Useful For

THIS IS A TESTING METHODOLOGY ONLY.

To identify Factor X deficiency, order Factor X Assay (F-X).
To monitor warfarin therapy, order Chromogenic Factor X (FXCHSO).
To monitor low molecular weight heparin (Lovenox, etc), order Heparin, Low Molecular Weight (HEPLMW).
To monitor unfractionated heparin, order Heparin, Unfractionated (HEPUF).
To monitor apixaban, order Apixaban (APIXASO).

To monitor fondaparinux (Arixtra): A MISC order is needed to send to Mayo with the following information:

• Mayo Test ID ZW57 
• Ref Lab Code 500465
• Test Name:  Heparin Anti-Xa Fondaparinux (Arixtra)