Purpose: This retrospective study was performed to determine the prevalence of lower extremity venous duplication using duplex ultrasound in the patient population of a large urban medical center. Materials and Methods: The reports of all lower extremity venous ultrasound examinations performed at our institution between January 1. 2002 and December 31. 2002 were reviewed. https://spencertifieders.shop/product-category/phono-preamps/