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  • Title: Evaluation of four coagulation tests to detect plasma lupus anticoagulants.
    Author: Saxena R, Saraya AK, Kotte VK, Singh YN, Prasad L, Malviya AN.
    Journal: Am J Clin Pathol; 1991 Dec; 96(6):755-8. PubMed ID: 1746492.
    Abstract:
    Lupus anticoagulant was detected in 205 newly diagnosed, untreated patients with systemic lupus erythematosus by the following tests: kaolin clotting time, activated partial thromboplastin time, plasma prothrombin time, and, in the last 99 patients, by dilute Russell's viper venom time. In 10 patients, lupus anticoagulant was detected by kaolin clotting time prolongation, corrected by inosithin but not by normal plasma; 12 and 6 of them had prolonged activated partial thromboplastin time and partial plasma prothrombin time, respectively. Only 10 patients had a history of recurrent abortions and/or thrombosis, nine of whom had lupus anticoagulant as shown by the kaolin clotting time test. Of the 99 patients studied by all four tests, 9 showed lupus anticoagulant by both kaolin clotting time and dilute Russell's viper venom time; 7 had a history of abortion and/or thrombosis. The dilute Russell's viper venom time test is easy to perform and not affected by inhibitors to factor VIII or IX. It is recommended as a primary screening test for lupus anticoagulant detection in a hospital clinical laboratory.
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