Methodology
Immunoturbidimetric
Synonyms
AT3; Heparin Cofactor; AT III; AT III Antigen
Specimen Type
Plasma
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
LAB00919
Lab Test Days
Sunday, Tuesday, Thursday and Friday
Standard TAT
1-3 Days
Collection Information
Specimen Required
(one) 1.8 mL or 2.7 mL Blood
Container Type
Light Blue (Sodium Citrate)
Collection Instructions
Draw blood in a light blue-top tube containing 3.2% sodium citrate, mix gently by inverting 3-4 times.
Processing Information - Lab Use Only
Transport Temperature
Frozen-Only
Specimen Stability
Room Temp: Unacceptable; Refrigerated: Unacceptable; Frozen: 30 Days
Rejection Criteria
Gross hemolysis; Grossly lipemic; Grossly icteric
Test Volume Required
1 mL Platelet-Poor Plasma
Minimum Test Volume
0.5 mL Platelet-Poor Plasma
Processing Instructions
Submit a separate, frozen vial for each special coagulation assay ordered. Centrifuge 15 minutes at 1500 g within one hour of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial(s). Freeze immediately and transport on dry ice.
CPT Codes
85301
Revised
6/29/23
Initials
SA