Specimen Requirements


Antiphospholipid Antibody Panel

Specimen Requirement

Collect 3 light blue sodium citrate tubes and centrifuge within 60 minutes. Using a plastic pipette transfer 1 mL plasma to 3 separate screw top transport tubes and indicate sample type on tubes.


Immunoassay (IA)


Room temp: 5 days, Refrigerated: 14 days, Frozen: 30 days

Reference Range

By Report*


3-8 days

Clinical Use

Test includes:
Beta-2 Glycoprotein Ab (IgA, IgG, IgM)
Cardiolipin Ab (IgA, IgG, IgM)
Phosphatidylserine/Prothrombin (PS/PT) Ab (IgG, IgM)

The antiphospholipid antibody syndrome (APS) is a clinical-pathologic correlation that includes a clinical event (e.g. arterial or venous thrombosis, pregnancy morbidity) and persistent positive antiphospholipid antibodies (IgM, IgG Cardiolipin or b2GPI antibodies greater than the 99th percentile; or a lupus anticoagulant). International consensus guidelines for APS suggest waiting at least 12 weeks before retesting to confirm antibody persistence. Low level antiphospholipid antibodies may sometimes be detected in the setting of infection, drug therapy or aging.

Test Code