This test evaluates for the presence of lupus anticoagulant, an antibody that interferes with phospholipid-dependent clotting reactions in the lab but increases clotting risk in the body.
Diagnostic Value: The DRVVT method uses snake venom to activate the clotting process; delayed clotting that fails to correct with added phospholipids confirms the presence of lupus anticoagulant.
Clinical Significance: Positive results indicate risk for thrombosis and are one of the main criteria for Antiphospholipid Syndrome (APS) diagnosis.
Symptom Correlation: Patients may experience recurrent blood clots, stroke, or pregnancy complications.
The LAC/DRVVT test is essential in identifying prothrombotic autoimmune disorders and guiding preventative treatment.