In US: For Research Use Only. Not for Use in Diagnostic Procedures. HEMOCLOT™ LA-C is a dRVV reagent with high phospholipid content to confirm the presence of Lupus Anticoagulants. Diluted Russell’s Viper Venom Test (dRVVT) are simplified reagents for specific detection of lupus anticoagulants (LA), using a manual, semi-automated or automated clotting method.