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Heparin Assay, Unfractionated Heparin
Test CodeLAB3900
Alias/See Also
Anti-Xa, Anti-10a, Anti-factor Xa Assay
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 Low intensity protocol range is 0.2 - 0.5 IU/mL
o High intensity protocol range is 0.3 - 0.7 IU/mL
o High intensity protocol range is 0.3 - 0.7 IU/mL
Performing Laboratory
Piedmont Athens Regional