Key result
Duplex scanning using the absence of phasicity of flow demonstrated 92% sensitivity and 92% specificity for diagnosing deep venous thrombosis compared to contrast venography.
Why the study?
Does duplex scanning accurately diagnose lower extremity deep venous thrombosis compared to contrast venography?
Population
47 patients evaluated for lower extremity deep venous thrombosis
Comparison
Duplex scanning vs Contrast venography (reference standard)
Design
Cohort, double-blind
Authors
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May reduce venography use for suspected DVT; leaves open whether isolated phasicity criterion suffices without combined criteria or prospective validation.
Observational (n=47)
Double-blind
Does duplex scanning accurately diagnose lower extremity deep venous thrombosis compared to contrast venography?
Isolated criteria from duplex scanning are insufficient to diagnose DVT; combinations of criteria are more accurate, and equivocal or calf vein cases may require repeat scanning or contrast venography.
Killewich et al. (1989) conducted an observational in Lower extremity deep venous thrombosis (n=47). Duplex scanning vs. Contrast venography was evaluated on Sensitivity and specificity for deep venous thrombosis. Duplex scanning using the absence of phasicity of flow demonstrated 92% sensitivity and 92% specificity for diagnosing deep venous thrombosis compared to contrast venography.
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