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Heparin Assay (Unfract)
Test CodeHEPUNF
Alias/See Also
ANTI-Xa UNFRAC
CPT Codes
85520
Preferred Specimen
1 Blue
Minimum Volume
Blue tops must be filled to Minimum Fill Indicator Line on tube.
Other Acceptable Specimens
none
Instructions
Outreach clients should double-spin the blue top plasma, remove the plasma from the RBC button, and freeze in a polypropylene tube.
Transport Container
BLUE/1
Transport Temperature
Blue - RT Polypropylene tube - Frozen
Specimen Stability
Whole Blood - 1 hour RT Separated plasma - 2 hours at RT or 1 month frozen
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Sample must be free of clots and hemolysis.
Methodology
Colorimetric
Setup Schedule
Daily upon Receipt
Report Available
Upon Completion of Analysis
Reference Range
The UFH therapeutic range is 0.30 – 0.70 IU/mL
The LMWH therapeutic range is 0.60 – 1.00 IU/mL
Clinical Significance
Unfractionated heparin (UFH) and low molecular weight heparin (LMWH) are used for the prevention and treatment of thromboembolic diseases. The quantitative determination of plasma levels is useful tool for monitoring treatment efficacy.