original_query: What are the specific tests used for the detection of lupus anticoagulant?
query: What are the specific tests used for the detection of lupus anticoagulant?
answer: The principal tests used for the detection of lupus anticoagulant include the PTT (plus 80:20 mix with normal plasma), dilute Russell's viper venom time (DRVVT), kaolin clotting time (KCT), dilute thromboplastin time (TDT/DTT), silica clotting time (SCT), and prothrombin time (using a lupus-sensitive thromboplastin).  These tests must be performed on at least two occasions, at least 6 weeks apart, and be positive on both occasions to confirm a diagnosis.