Beta-2 glycoprotein IgG is a blood test that measures the presence and levels of antibodies against beta-2 glycoprotein I (Beta2GPI), a protein found in the blood.nn These antibodies, known as anti-Beta2GPI antibodies, are associated with antiphospholipid syndrome (APS), an autoimmune disorder that causes blood clots and pregnancy complications. The test is used to diagnose APS and monitor its progression.

CARDIOLIPIN ANTIBODIES ARE USEFUL IN IDENTIFYING PATIENTS WITH AN INCREASED RISK OF THROMBOSIS, RECURRENT SPONTANEOUS ABORTIONS AND PHOSPHOLIPID ANTIBODY SYNDROME. CARDIOLIPIN ANTIBODY IGG IS THE MOST SENSITIVE BUT THE LEAST SPECIFIC ANTIBODY.

CARDIOLIPIN ANTIBODIES ARE USEFUL IN IDENTIFYING PATIENTS WITH AN INCREASED RISK OF THROMBOSIS, RECURRENT SPONTANEOUS ABORTIONS AND PHOSPHOLIPID ANTIBODY SYNDROME. CARDIOLIPIN ANTIBODY IGM IS LESS SENSITIVE BUT MORE SPECIFIC THAN CARDIOLIPIN ANTIBODY IGG.

The Lupus Anticoagulant by dRVVT (dilute Russell's viper venom time) test is a coagulation assay used to detect the presence of lupus anticoagulants (LA), which are a type of antiphospholipid antibodies. Despite their name, these antibodies are not typically associated with bleeding disorders or systemic lupus erythematosus and are in fact linked to an increased risk of blood clots (thrombosis). The dRVVT test works by using a diluted venom that directly activates Factor X of the coagulation cascade. A prolonged clotting time in the initial screening phase suggests the presence of an inhibitor. This is followed by a confirmatory test using an excess of phospholipids. If the prolonged clotting time corrects (shortens) in the confirmatory step, it indicates that the inhibitor is phospholipid-dependent, which is a characteristic of lupus anticoagulants.