513 PHENOTYPIC CHARACTERIZATION OF FUNCTIONAL DEFECATORY DISORDERS USING SIMULTANEOUS MR DEFECOGRAPHY AND MANOMETRY

BACKGROUND & AIMS null High resolution manometry (HRM) is widely used to diagnose defecatory disorders (DD). Contrary to conventional concepts, many healthy people have a negative rectoanal gradient during evacuation (ie, anal > rectal pressure), which undermines our understanding of the mechanisms of normal defecation and DD. Perhaps this is partly because manometry is performed in an empty rectum in the left lateral position. Aimed to better...