The authors report on the use a new barium enema catheter employed in 398 patients from January, 1990 through June, 1991. Its innovative characteristics and several possible uses are compared with those of conventional equipment. Particularly, the advantages offered by the various possible placement sites of the catheter--i.e., the II duodenal portion and beyond the ligament of Treitx--are discussed, together with its different uses according to clinical symptoms: its best location is beyond the ligament of Treitz in subocclusions, versus in the II duodenal portion if tumors or other duodenal conditions are suspected. The new catheter exhibited 100% accuracy; the average exposure time for radioscopy during its positioning was 3 minutes. A selected group of 149 patients was examined for complications, which were few (8%), of poor importance, short and completely curable.