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Fig. 6C —48-year-old woman with Roux limb inversion. Follow-up fluoroscopic examination was performed after bowel preparation to clear contrast material from alimentary limb. Image obtained after administration of medium-density barium through jejunal tube shows biliary limb of normal caliber. Peristalsis is antegrade within biliary limb. At distal anastomosis, divergent flow of contrast material is evident antegrade into common limb (white asterisk) and retrograde into alimentary limb (black asterisk). Thin arrows indicate direction of peristalsis.