Computed tomographic diagnosis of enterovesical fistulae: barium evacuation method.

We reviewed and compared the computed tomographic (CT) findings for 5 patients suspected of having enterovesical fistulae with convential radiographic studies and the results of cystoscopy. Prior to scanning, patients were rectally administered 200 ml of 0.8% wt/vol barium solution, and then evacuated before they were administered 200 ml of olive oil via the anus and 100 ml of olive oil via the urethra. The CT following the barium evacuation successfully demonstrated the enterovesical fistulae in 4 patients. It was also diagnostic in a clinically suspected case in verifying the absence of an enterovesical fistula.