Document Detail

Anal sphincter response to distension.
MedLine Citation:
PMID:  11355318     Owner:  NLM     Status:  MEDLINE    
Resting anal pressure as determined by manometry is unsuited for assessing the competence of a sphincter. To validate a compliance method of sphincter evaluation we investigated the response of the anal canal to distension. In 20 healthy subjects the anal sphincter was distended using a cylindrical balloon probe subjected to continuous inflation. Two speeds of distension were used: 12 and 80 ml/min. Deflation, at the rate of inflation, immediately followed the inflation at 12 ml/min, and at 80 ml/min was performed after a deformation volume of 12 ml was maintained for 2 min. The response of the anal sphincter to 12 ml/min distension was characterized by an initial phase of resistance followed by relaxation of the anal sphincter in all subjects. In contrast, at 80 ml/min no opening was obtained. During the deformation a biomechanical relaxation curve was recorded. We conclude that the anal sphincter acts as a low-pass filter and not only as a pressure barrier. The response of the anal sphincter to distension is a simple test, which provides functional information on the behavior of the anal sphincteric zone.
M Bouchoucha; A Faye; M Arsac; F Rocaries
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  International journal of colorectal disease     Volume:  16     ISSN:  0179-1958     ISO Abbreviation:  Int J Colorectal Dis     Publication Date:  2001 Apr 
Date Detail:
Created Date:  2001-05-17     Completed Date:  2001-10-04     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  8607899     Medline TA:  Int J Colorectal Dis     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  119-25     Citation Subset:  IM    
Laboratoire de Physiologie Digestive, Hôpital Broussais, 96 rue Didot, 75014 Paris, France.
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MeSH Terms
Anal Canal / physiology*
Manometry / methods*
Muscle Contraction
Muscle Relaxation
Rectum / physiopathology*
Reference Values
Sensitivity and Specificity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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