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Radiology, Vol 206, 397-401, Copyright © 1998 by Radiological Society of North America

ARTICLES

Duplicated superficial femoral veins: a source of error in the sonographic investigation of deep vein thrombosis

NJ Screaton, JH Gillard, LH Berman and PM Kemp
Department of Radiology, Addenbrooke's Hospital, Cambridge, England.

PURPOSE: To determine whether the number of false-negative ultrasound (US) findings of thrombosis is larger when a duplicated femoropopliteal venous system is present. MATERIALS AND METHODS: A retrospective review was performed of 381 venograms obtained after initial US findings were considered negative for thigh or popliteal thrombosis in patients in whom deep vein thrombosis was suspected Venograms were evaluated for the presence of thrombosis and the presence and configuration of duplicated superficial femoral veins. RESULTS: Multiple superficial femoral veins were present on 177 (46%) of the 381 venograms; 149 (84%) were duplex systems. False-negative US findings occurred in four (2%) of 204 patients with single femoral veins and in 10 (6%) of 177 patients with duplicated femoral veins (P = .056, not statistically significant). CONCLUSION: The frequency of missed proximal thrombosis at sonography appears to be increased when duplicated superficial femoral veins are present. Data from clinical and imaging studies are insufficient to support the adoption of a totally noninvasive imaging strategy.


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