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Test Code ANTIXA Factor Xa, Activity, Low Molecular Weight Heparin (Enoxaparin, Lovenox)

Performing Laboratory

Northwell Health Laboratories


Chromogenic-ACL-Top Beckman/Coulter/IL

Reference Values

0.5-1.1 Units/mL

Test Classification and CPT Coding


Physician Office Specimen Requirements

Blood must arrive immediately after draw.


Container/Tube:  Light blue-top (3.2% sodium citrate) tube

Specimen:  Full tube

Transport Temperature:  Refrigerate

Collection Instructions:  If there is a delay in transport, spin down, spin plasma again, and send citrate platelet-poor plasma. Double-centrifuged specimens are critical for accurate results as platelet contamination may cause spurious results.

Note:  Patient must be on low molecular weight heparin, not danaparoid.

Day(s) and Time(s) Performed

Monday through Sunday

Computer Interface Code

PDM #  5914500