Combining Taipan snake venom time/Ecarin time screening with the mixing studies of conventional assays increases detection rates of lupus anticoagulants in orally anticoagulated patients

Table 2 DRVVT, DAPTT and TSVT mixing study data from 80 orally anticoagulated patients with lupus anticoagulants

Assay	n	Number with confirmatory test correction back into reference range (%)	Number without confirmatory test correction back into reference range (%)
DRVVT	56	7 (12.5)	49 (87.5)
DAPTT	47	26 (55.3)	21 (44.7)
TSVT/ET *	58	26 (44.8)	4 (6.9)

* Twenty eight of 58 (48.3%) TSVT mixing studies had TSVT ratios within the mixing study specific reference range and were excluded from this analysis. DRVVT, dilute Russell's viper venom time; DAPTT, dilute activated partial thromboplastin time; TSVT, Taipan snake venom time; ET, Ecarin time