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HelpTest Code ANTIXA Heparin Anti Xa Assay, Plasma, LAB2513
Performing Laboratory
St. Luke's Hospital Cedar Rapids
Specimen Requirements
Container/Tube:
Preferred: Full blue-top (sodium citrate) 1.8 mL tube-Hemolyzed or short draw specimen is not acceptable.
Specimen Volume: 0.5 mL sodium citrate plasma
Stability: Specimens should be kept at room temperature, spun within 1 hour of collection, and testing completed within 2 hours of collection.
Collection Instructions: Centrifuge immediately after draw. Forward promptly.
NOTE: Patients with a hematocrit of> 55% must be recollected using an altered amount of sodium citrate.
Reference Values
0.30-0.70 iu/mL
Critical value: ≥1.04 IU/mL
Day(s) Test Set Up
Monday through Sunday
Useful For
Useful in monitoring Unfractionated Heparin used for heparin therapy
Methodology
Chromogenic assay
Test Classification and CPT Coding
85520
Report Available
STAT within 1 hour of receipt. Routine within 2 hours of receipt.