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Heparin Assay, Low Molecular Weight Heparin
Test CodeLAB2244
Alias/See Also
Anti-Xa, Anti-10a, Anti-factor Xa, LMW heparin
CPT Codes
85520
Preferred Specimen
Light blue top tube (Citrated blood 9:1 (blood to anticoagulant) 3.2% sodium citrate)
Minimum Volume
Full tube, no partial fills.
Instructions
Invert tube twenty times to adequately mix anticoagulant.
Transport Temperature
room temp
Specimen Stability
Separated from cells: 2 hours room temperature or 1 month frozen (-20 C)
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Overfilled or underfilled tubes; Clotted or hemolyzed specimens, patients with a HCT >55%
Methodology
chromogenic assay
Setup Schedule
Mon-Sun
Reference Range
o Q12hr Regimen: Therapeutic range is 0.6 - 1.0 IU/mL
o Q24hr Regimen: Therapeutic range is 1.0 - 2.0 IU/mL
o Prophylaxis target is 0.1 - 0.3 IU/mL
o Q24hr Regimen: Therapeutic range is 1.0 - 2.0 IU/mL
o Prophylaxis target is 0.1 - 0.3 IU/mL
Performing Laboratory
Piedmont Athens Regional
