title: Differences in ano-neorectal physiology of ileoanal and coloanal reconstructions for restorative proctectomy.
abstract: OBJECTIVE
  Restorative proctectomy with straight coloanal anastomosis (CAA) and restorative proctocolectomy with ilealpouch-anal anastomosis (IPAA) are options for maintaining bowel integrity after rectal resection. The aim of this study was to compare clinical function and anorectal physiology in patients treated with CAA and IPAA.
  
  
  METHODS
  Three-dimensional vector-manometry and neorectal volumetry were performed in straight CAA [53 patients (34 male)] and IPAA [61 patients (39 male)] for ulcerative colitis. Function was assessed using a 14 day incontinence diary.
  
  
  RESULTS
  Function was similar in both groups, but neorectal compliance and threshold volumes for sensation, urge and maximum tolerated volume (MTV) were significantly higher after IPAA than after CAA. Mean pressure, vector volume and sphincter symmetry at rest were significant determinants of continence in both groups but squeeze pressure did not correlate significantly with function in either group. Threshold volume, MTV, and compliance were significantly correlated with frequency of defecation in patients with IPAA but not with CAA.
  
  
  CONCLUSIONS
  A strong consistent resting anal sphincter pressure is one determinant of continence after both IPAA and CAA. Squeeze pressures do not influence the functional result. In IPAA but not CAA, the neorectum has a reservoir function which correlates with the postoperative frequency of defaecation.
authors.affiliation: Leverkusen General Hospital, Department of General Surgery, Am Gesundheitspark, Leverkusen, Germany. andreas.rink@ukmainz.de
authors.forename: A D
authors.initials: AD
authors.lastname: Rink
authors.forename: W
authors.initials: W
authors.lastname: Kneist
authors.forename: I
authors.initials: I
authors.lastname: Radinski
authors.forename: A
authors.initials: A
authors.lastname: Guinot-Barona
authors.forename: H
authors.initials: H
authors.lastname: Lang
authors.forename: K H
authors.initials: KH
authors.lastname: Vestweber
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001003:Anal Canal / Q000502:physiology*; D003093:Colitis, Ulcerative / Q000601:surgery; D003672:Defecation / Q000502:physiology*; D005242:Fecal Incontinence / Q000209:etiology; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008365:Manometry; D008875:Middle Aged; D016737:Proctocolectomy, Restorative / Q000009:adverse effects / Q000379:methods*; D020127:Recovery of Function; D012007:Rectum / Q000502:physiology*