title: Three-dimensional pressure profilometry of the anal sphincter.
abstract: Single channel manometry is of limited value in determining the cause of sphincter dysfunction. This is due mainly to the recording variability caused by radial pressure asymmetry. Multi-channel manometry does not have this disadvantage, but is complicated and difficult to interpret. We report on computerized eight-channel manometry which permits three-dimensional reconstruction of the sphincter. Fifteen subjects were measured. At rest, lower pressures were recorded in the left, left-dorsal, and dorsal directions. Sphincter length was shortest in the right direction and ventral directions. The graphic reconstruction showed marked indentations in the right- and right anterior direction, and one indentation on the opposite side. At maximal squeeze the graphic reconstruction showed the same indentations, but they were more pronounced. In conclusion, computerized eight-channel manometry proved to be an efficient technique which could be routinely applicable. The graphic reconstruction provides insight into radial and axial pressure asymmetry.
authors.affiliation: Department of Surgical Research, Academic Medical Center, University of Amsterdam.
authors.forename: V P
authors.initials: VP
authors.lastname: van der Hulst
authors.forename: W A
authors.initials: WA
authors.lastname: Bemelman
authors.forename: T
authors.initials: T
authors.lastname: Dijkhuis
authors.forename: P J
authors.initials: PJ
authors.lastname: Klopper
mesh_terms: D000293:Adolescent; D000328:Adult; D001003:Anal Canal / Q000502:physiology*; D003196:Computer Graphics; D006801:Humans; D008297:Male; D008365:Manometry / Q000379:methods*; D011312:Pressure; D012815:Signal Processing, Computer-Assisted