Comparison of Duplex Ultrasonography and Ascending Contrast Venography in the Diagnosis of Venous Thrombosis

The application of duplex ultrasonography to the diagnosis of venous throm bosis requires validation by comparison of the duplex findings with the results of ascending contrast venography. In this study, 2534 veins were examined by both methods with contrast venography results serving as the standard for com parison. In this setting, duplex ultrasonography proved to be 100% sensitive and 99% specific for venous thrombosis. Duplex ultrasonography is as reliable as venography in the diagnosis of venous thrombosis and has no associatedrisks or known complication. In addition, duplex ultrasonography provides informa tion regarding pathologic anatomy that is comparable to the detail provided by high-quality venography. The authors conclude that duplex ultrasonography should be the diagnostic method of choice for evaluating patients with suspected venous thrombosis.