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Diseases of the Colon & Rectum
Published in: Diseases of the Colon & Rectum 2/2005

01-02-2005

Denervation of the Neorectum as a Potential Cause of Defecatory Disorder Following Low Anterior Resection for Rectal Cancer

Authors: Keiji Koda, M.D., Ph.D., Norio Saito, M.D., Ph.D., Kazuhiro Seike, M.D., Ph.D., Kimio Shimizu, M.D, Chihiro Kosugi, M.D, Masaru Miyazaki, M.D., Ph.D.

Published in: Diseases of the Colon & Rectum | Issue 2/2005

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PURPOSE

The aim of this study was to determine whether denervation of the sigmoid colon during low anterior resection contributes to the postoperative motility characteristics of the neorectum and to the defecatory function of patients.

METHODS

Sixty-seven patients who underwent either low or ultralow anterior resection for rectal cancer were evaluated. In accordance with the length of denervated neorectum, each patient was assigned to either the short-denervation or long-denervation group, determined by whether the inferior mesenteric artery was divided. Colonic propagated contraction was then measured by means of intraluminal pressure monitoring. Transit time was calculated with orally administered radiopaque markers.

RESULTS

Propagated contraction down to the neorectum was significantly less common in the long-denervation group (14/36) than in the short group (12/15, P < 0.05), whereas spastic minor contraction at the neorectum was significantly more common in the long-denervation group (21/36) than the in short group (3/15, P < 0.05). Colonic transit time below the sigmoid colon was significantly longer in long group (6.4 hours) than in the short group (3.4 hours, P < 0.01). Although motility disorder of the neorectum was correlated with clinical defecatory malfunctions, including multiple evacuations, urgency, and soiling, no significant correlation was noted between the length of the denervated neorectum and the defecatory disorders.

CONCLUSIONS

Motility of the neorectum following low anterior resection appears degraded by intraoperative maneuvers that cause denervation of the remnant sigmoid colon. Motility disorder of the neorectum, but not the length of the denervated neorectum causing the disorder, correlates well with several defecatory malfunctions. This finding suggests that postoperative defecatory disorder as a result of low anterior resection is caused by many factors in addition to denervation of the neorectum.
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Metadata
Title
Denervation of the Neorectum as a Potential Cause of Defecatory Disorder Following Low Anterior Resection for Rectal Cancer
Authors
Keiji Koda, M.D., Ph.D.
Norio Saito, M.D., Ph.D.
Kazuhiro Seike, M.D., Ph.D.
Kimio Shimizu, M.D
Chihiro Kosugi, M.D
Masaru Miyazaki, M.D., Ph.D.
Publication date
01-02-2005
Publisher
Springer-Verlag
Published in
Diseases of the Colon & Rectum / Issue 2/2005
Print ISSN: 0012-3706
Electronic ISSN: 1530-0358
DOI
https://doi.org/10.1007/s10350-004-0814-6

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