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

Synonyms

• ANTIXA
• HEPARIN ASSAY, LMW, ANTI-XA
• LAB10519

Cerner Name

LMW Heparin Assay

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 Sources

Blood, Arterial Blood, Capillary Blood, Central Line Blood, Venous

Specimen Types

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.

Specimen Volume

Full tube

Transport Instructions

Refrigerate

Specimen Stability

Methodology

Chromogenic-ACL-Top/IL

Days Performed

Monday through Sunday

Performing Laboratory

Northwell Health Laboratories

CPT

85130

PDM

5914500

Only Orderable at Locations:

Orderable Everywhere

Results

Result Interpretation

Forms