Test directory: Anti-Thrombin III

Ordering Code710
Test NameAnti-Thrombin III
AliasAntithrombin III, Functional
Heparin Cofactor II Activity
Antithrombin Activity
AT III
AT
Heparin Resistance
Preferred SpecimenPlasma
Preferred ContainerCitrate, 3.2% (Lt Blue)
Other Specimen/ContainerWhole Blood in Citrate, 3.2% (Lt Blue) if testing is done within 4 hours.
Optimum VolumePlasma = 1 mL
Whole Blood = Entire tube
Collection InstructionsDraw full tube
Mix tube well.
Handling InstructionsDouble centrifuge plasma, separate, and freeze at -20 deg. C immediately. Do NOT thaw once specimen is frozen.
Transport RequirementsPreferred method of transport is frozen plasma.
Specimen StabilityAmbient: 4 hours Whole Blood (unopened tube)
Ambient: 8 hours Plasma
Frozen: 1 month Plasma
Rejection CriteriaClotted, Contaminated, Hemolyzed, Improperly filled or underfilled tube, Specimen older than stability limits.
Avail. StatNO
Analytic TimeUp to 1 Week
MethodologyChromogenic substrate

Reference range(s)

ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
Anti-Thrombin III0-6M%See report.
Anti-Thrombin IIIADULT80-12080-120%