Lupus and your body  Can I be tested for antiphospholipid
antibodies?   See all of Michelle Petri, MD, MPH's answers.
Specialized blood tests which measure blood clotting
(coagulation tests) are used to find lupus anticoagulant. The
activated partial thromboplastin time (aPTT) is a widely
available blood clotting test that is often used. If the aPTT is
normal, more sensitive coagulation tests should be done, which
include modified Russell viper venom time (RVVT), platelet
neutralization procedure (PNP), and kaolin clotting time (KCT).
If the number of seconds that it takes the blood to clot is
prolonged, the physician will suspect that lupus anticoagulant
is present. This can be confusing, because even though the blood
takes longer to clot in the test tube, the blood actually clots
more easily in the person’s body.  Anticardiolipin antibody and
anti-β2 glycoprotein I are measured in an ELISA test. There are
several classes of anticardiolipin antibody—IgG, IgM, and IgA.
It is possible to test for all of these