Synonyms: Antithrombin III functional
Computer Code: AT3
Specimen Collection: 2.7 mL blood (blue top tube). Transport to lab within 3 hours.
Minimum Volume: 1.8 mL
Handling Instructions for Offsite Areas: Maintain at room temperature. If specimen cannot be transported within 2 hours, centrifuge at 3,000 rpm for 20 minutes. Using a plastic pipette, transfer plasma to plastic tube and freeze plasma.
Reference Values: 83 - 128%
Lab Code: Diagnostic Hematology
Requisition: SPEC H
Test Frequency: Weekly
Routine TAT: 7 days
Stat TAT: Must call Hematology lab for stat request.
CPT Code(s): 85300
Methodology Used:
See Addendum XVII