Test Details


Detect lupus anticoagulants and antiphospholipid antibodies

Test Includes

Anticardiolipin antibodies, IgG and IgM; β2-glycoprotein 1 antibodies, IgG and IgM; dilute prothrombin time profile; lupus anticoagulant with reflex


See individual tests.

Related Documents

For more information, please view the literature below.

Procedures for Hemostasis and Thrombosis: A Clinical Test Compendium


Alving BM. The antiphospholipid syndrome: Clinical presentation, diagnosis, and patient management. In: Kitchens CS, Alving BM, Kessler CM, eds Consultative Hemostasis and Thrombosis. Philadelphia, Pa: WB Saunders Co; 2002:181-196.
Schafer AI, Levine MN, Konkle BA, et al. Thrombotic disorders: Diagnosis and treatment. Hematology (Am Soc Hematol Educ Program). 2003; 520-539. 14633797
Triplett DA. Thrombophilia. In: McClatchey KD, ed. Clinical Laboratory Medicine. 2nd ed. Philadelphia, Pa: Lippincott Williams and Wilkins;2002:1033-1049.

Specimen Requirements

Information on collection, storage, and volume


Serum and plasma, frozen


1 mL serum and 2 mL frozen sodium citrate plasma


Red-top tube or gel-barrier tube and blue-top (sodium citrate) tubes

Storage Instructions

Refrigerate serum. Freeze plasma.


Citrated plasma samples should be collected by double centrifugation. Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.1 Evacuated collection tubes must be filled to completion to ensure a proper blood to anticoagulant ratio.2,3 The sample should be mixed immediately by gentle inversion at least six times to ensure adequate mixing of the anticoagulant with the blood. A discard tube is not required prior to collection of coagulation samples, except when using a winged blood collection device (ie, "butterfly"), in which case a discard tube should be used.4,5 When noncitrate tubes are collected for other tests, collect sterile and nonadditive (red-top) tubes prior to citrate (blue-top) tubes. Any tube containing an alternate anticoagulant should be collected after the blue-top tubes. Gel-barrier tubes and serum tubes with clot initiators should also be collected after the citrate tubes. Centrifuge for 10 minutes and (using a plastic transfer pipette) carefully remove two-thirds of the plasma without disturbing the cells. Deliver to a plastic transfer tube, cap, and recentrifuge for 10 minutes. Use a second plastic pipette to remove the plasma, staying clear of the platelets at the bottom of the tube. Transfer the plasma into a Labcorp PP transpak frozen purple tube with screw cap (Labcorp No. 49482). The specimen should be frozen immediately and maintained frozen until tested.

Please print and use the Volume Guide for Coagulation Testing to ensure proper draw volume.