Enoxaparin Assay (Anti Xa)
Label Mnemonic: ENOX
Epic code: LAB316
Downtime form: Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Hemostasis/Thrombosis
6240 RCP
356-3573
Specimen(s):
Citrated Plasma More information
Collection Medium:
Light Blue top tube 1.8 mL (Na Citrate)
Minimum:

Full draw; 1.8 mL in light blue-top (3.2% sodium citrate) tube. Mix well.

Delivery Instructions:
Deliver to laboratory within 1 hour of collection.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
2 hours (upon receipt in laboratory)
Reference Range:

The therapeutic range for low molecular weight heparins (LMWH) varies with the type and manufacturer, but for adults is typically 0.4 – 1.1 U/mL. For adults, the target range for VTE prophylaxis is 0.2 – 0.4 U/mL.

Comments:

High doses of low molecular weight heparin with low anti-Xa results could be due to low antithrombin activity.

Methodology:

Anti Xa activity by chromogenic substrate without antithrombin supplementation.

Assay updated to Siemens Innovance reagent on 03/05/19.

CPT Code:
85520