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Heparin Anti-Xa Assay (Heparin Drip Monitoring), Plasma
Test CodeHFXAH
CPT Codes
85520
Preferred Specimen
Draw blood in a light blue-top (sodium citrate) tube. Spin specimen down, remove plasma, spin plasma again, and place 1 mL of plasma in plastic vial.Note: Double-centrifuged specimens are critical for accurate results as platelet contamination may cause spurious results.
Transport Temperature
Frozen
Methodology
Colorimetric
Setup Schedule
Monday through Sunday
Reference Range
Therapeutic range: 0.3-0.7 IU/mL
Critical values: <0.3 IU/mL or >0.7 IU/mL
Performed By
North Mississippi Medical Center Pathology Department
Performing Laboratory
NMMC Pathology Department