Indwelling urinary catheters are a primary site for nosocomial infections. The purpose of this study is to evaluate the anti-adhesive properties of Cranberry type A pro anthocyanidine gel capsules in the prevention Escherichia coli infections on indwelling urinary catheters placed in patients following pelvic surgery. The investigators primary working hypothesis is that cranberry treatment decreases E. coli colonization on indwelling urinary catheters, thus preventing nosocomial urinary infections following pelvic surgery.