Document Detail

Effect of continuous rectal distention on anal resting pressure.
MedLine Citation:
PMID:  11357027     Owner:  NLM     Status:  MEDLINE    
PURPOSE: Intermittent distention of the rectum induces internal anal sphincter relaxation, but whether continuous rectal distention might affect the resting pressure of the anal canal and the frequency of internal anal sphincter relaxations has not yet been investigated. The aim of this study was to record anal pressure under resting conditions and at two levels of continuous rectal distention. METHODS: Anal pressure was recorded by means of water-perfused catheters under resting conditions and at two levels of rectal distention controlled by an electronic barostat in eight healthy subjects. RESULTS: Continuous rectal distention did not significantly change mean anal resting pressure, but it did significantly decrease the amplitude of ultraslow waves (from 29 +/- 9 mmHg under resting conditions to 23 +/- 6 and 21 +/- 3 mmHg during lesser and greater rectal distention; P = 0.017 and P = 0.012, respectively) and increase the frequency of internal anal sphincter relaxations (from 1.3 +/- 1.3/hour under resting conditions to 8.8 +/- 4.3/hour and 11.0 +/- 4.8/hour during lesser and greater distention; P = 0.012 in both comparisons). CONCLUSIONS: The resting pressure of the anal canal is maintained during continuous rectal distention. The decreased amplitude of ultraslow waves and increased frequency of the internal anal sphincter relaxations induced by rectal distention reveal a complex functional relationship between the rectum and the anal canal.
A Mularczyk; P A Bianchi; G Basilisco
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Diseases of the colon and rectum     Volume:  44     ISSN:  0012-3706     ISO Abbreviation:  Dis. Colon Rectum     Publication Date:  2001 May 
Date Detail:
Created Date:  2001-05-17     Completed Date:  2001-06-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372764     Medline TA:  Dis Colon Rectum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  672-6     Citation Subset:  IM    
Cattedra di Gastroenterologia, Istituto di Scienze Mediche dell'Università degli Studi di Milano, IRCCS Ospedale Maggiore di Milano, Milan, Italy.
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MeSH Terms
Anal Canal / physiology*
Gastrointestinal Motility
Rectum / physiology*

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

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