ARUP's Laboratory Test Directory

Heparin Anti-Xa, Low Molecular Weight Heparin : 0030144

Mnemonic: HA LMW

Methodology: Chromogenic/Inhibition of Xa
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect:  One 5 ml lt. blue (3.2 % sodium citrate).  Refer to the Hemostasis/Thrombosis Specimens section in the front of this User's Guide for additional specimen collection instructions. 

Transport:  2 mL platelet-poor plasma, frozen.  (Min: 1.5 mL)

Pediatric Collection/Transport:  1.5 mL platelet-poor plasma, frozen.

Remarks:  Record heparin type on test request form.  Sample should be centrifuged within one hour of collection.

Unacceptable Conditions:  Serum, hemolyzed samples, EDTA, oxalate, heparin, plasma separator tubes, and samples refrigerated more than eight hours.

Stability:  After separation from cells: Ambient: 4 hours; Refrigerated: 8 hours; Frozen: 2 weeks
Reference Interval:
0.50-1.10 U/mL
Interpretive Data: Therapeutic range based on enoxaparin brand low molecular weight heparin.
CPT Code(s): 85520
 
 

 

 

 
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