14781-koppen

154 Chapter 7 migration during the manometry were determined by abdominal X-ray prior to initiation (directly after placement of the catheter) and after completion of the manometry recording (Figure 1). For the adult studies, catheter placement has been described elsewhere. 13,17 In adults, the catheter tip was placed in the ascending or proximal transverse colon. For this study, only the data recorded from the descending and sigmoid colon were considered. FIGURE 1: X-ray image of the water-perfused catheter coloscopically placed to the splenic flexure in one of the pediatric patients. Tantalum markers (each within the black oval shapes) were placed at every second sidehole allowing for the accurate placement of recording site within colonic regions. The location of sideholes 5, 15, 25, and 35 is shown in the x-ray image.