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Lupus Anticoagulant Profile (Esoterix)
Activated partial thromboplastin time (aPTT); anticardiolipin antibodies, IgG, IgM; β2-glycoprotein I, IgA, IgG, IgM; dilute Russell's viper venom time (dRVVT); hexagonal phospholipid neutralization; international normalized ratio (INR); lupus anticoagulant interpretation; platelet neutralization; prothrombin time; thrombin time
Immediate reflex to aPTT Mixing Studies  if aPTT is five or more seconds above the upper end of the reference interval.
Clot; enzyme-linked immunosorbent assay (ELISA)
Plasma and serum, frozen
Three 2-mL citrated plasma tubes and 2 mL serum
Plasma/serum must be separated from cells within 45 minutes of venipuncture. Send plasma/serum in plastic transport tubes. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.