ABSTRACT
Vector manometry is an extension of conventional manometric techniques with an evolving role in the study of the anal sphincter and the physiological assessment of fecal continence mechanisms. Anal vector manometry measures the magnitude and direction of radial pressure at multiple points within the anal canal. The resulting set of pressure vectors is plotted as a pressure vectorgram. This is a three-dimensional image which allows rapid visual appraisal of the manometric characteristics of the anal canal. Current technology limits the manometric method to low-compliance hydraulic perfusion manometry. Anal vector manometry has its primary clinical application in the assessment of fecal continence and in the identification of anatomical injuries to the anal sphincters. Anal vector manometry should not be regarded as a complete physiological evaluation of the anal canal or the continence mechanisms. It must be interpreted in the context of careful examination and other physiological assessments.
