LMW Heparin Assay LMW Heparin Assay

Synonyms

ANTIXA

Allscripts (AEHR) Order Name

Anti Factor XA Activity

Sunrise Clinical Manager (SCM) Order Name

Heparin Assay, LMW, Anti-Xa

EPIC Order Name

Low Molecular Weight Heparin, Anti-Xa (LMWH, Anti-Xa)

Clinical Info

Measuring Low Molecular heparin concentration:
-In patients treated with low-molecular-weight heparin preparations (Lovenox(Enoxaparin))
-In the presence of prolonged baseline activated partial thromboplastin time (APTT) (eg, lupus anticoagulant, "contact factor" deficiency, etc)

Specimen Type

Blood

Container

Blue Top Tube

Collection Instructions

Blood must arrive immediately after draw.- 4 Hours
 
Container/Tube:  Light blue-top (3.2% sodium citrate) tube
Specimen:  Full tube within four hours or 1mL platelet poor plasma
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. Send Frozen platelet poor plasma)
Note:  Patient must be on low molecular weight heparin, not danaparoid.

Transport Instructions

Refrigerate

Specimen Stability

Methodology

Chromogenic-ACL-Top/IL

Days Performed

Monday through Sunday

Performing Laboratory

Northwell Health Laboratories

CPT

85130

PDM

5914500

Result Interpretation

0.5-1.1 Units/mL

Forms