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Russell's viper, Daboia russelii Dilute Russell's viper venom time (dRVVT) is a laboratory test often used for detection of lupus anticoagulant (LA). It is an assessment of the time for blood to clot in the presence of a diluted amount of venom from Russell's viper (Daboia russelii), a highly venomous snake native to the Indian subcontinent and named after the herpetologist Patrick Russell.
A ratio of 1.2 is commonly used, such that a value <1.2 indicates the absence of a lupus anticoagulant, while a value >1.2 indicates the presence of a lupus anticoagulant. [19] Direct oral anticoagulants and vitamin K antagonists used to treat thrombosis can interfere with lupus anticoagulant assays and generate either false-positive or false ...
Kaolin clotting time (KCT) is a sensitive test to detect lupus anticoagulants. [2] There is evidence that suggests it is the most sensitive test for detecting lupus anticoagulants. [3] It can also detect factor VIII inhibitors but is sensitive to unfractionated heparin as well. [4]
Mixing studies are tests performed on blood plasma of patients or test subjects to distinguish factor deficiencies from factor inhibitors, such as lupus anticoagulant, or specific factor inhibitors, such as antibodies directed against factor VIII. [1] Mixing studies are screening tests widely performed in coagulation laboratories.
Sodium heparin (anticoagulant) Chromosome testing, HLA typing, ammonia, lactate: Light green Lithium heparin (anticoagulant) Plasma separator gel Plasma. Tube inversions prevent clotting Lavender ("purple") EDTA (chelator / anticoagulant) Whole blood: CBC, ESR, Coombs test, platelet antibodies, flow cytometry, blood levels of tacrolimus and ...
Schematic representation of antibody. Anti-cardiolipin antibodies (ACA) are antibodies often directed against cardiolipin and found in several diseases, including syphilis, [1] antiphospholipid syndrome, livedoid vasculitis, vertebrobasilar insufficiency, Behçet's syndrome, [2] idiopathic spontaneous abortion, [3] and systemic lupus erythematosus (SLE). [4]
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