Document Detail

Abnormal rectal motor physiology in patients with irritable bowel syndrome.
MedLine Citation:
PMID:  15086879     Owner:  NLM     Status:  MEDLINE    
A contentious issue is whether irritable bowel syndrome (IBS) patients have abnormal rectal motor physiology. Our aim was to determine whether IBS patients have abnormal rectal responses to low (urge producing) or high (pain producing) distension pressures. The IBS patients and healthy controls underwent five series of isobaric rectal distensions to examine volume-pressure relationships and rectal accommodation: (i) ascending stepwise distensions terminating upon report of moderate pain, (ii) phasic and (iii) tonic distensions at a single low pressure producing a moderate sensation of urge to defecate (iv) phasic and (v) tonic distensions at a single high pressure producing a moderate pain sensation. The IBS patients demonstrated a lower rectal volume-pressure ratio during repetitive single-pressure phasic distensions, and a slower rate of rectal accommodation during low (but not high) pressure tonic distensions. However, dynamic compliance during ascending stepwise distensions and the change in rectal volume during tonic distension were not significantly different from controls. Rectal abnormality was readily demonstrated by determining the volume-pressure ratio using a small number of repetitive single-pressure distensions, supporting the hypothesis that IBS patients have abnormal rectal motor physiology. We propose that a peripheral neuromuscular substrate may contribute to the pathogenesis of IBS.
C L Kwan; K D Davis; K Mikula; N E Diamant
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society     Volume:  16     ISSN:  1350-1925     ISO Abbreviation:  Neurogastroenterol. Motil.     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-04-16     Completed Date:  2004-06-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9432572     Medline TA:  Neurogastroenterol Motil     Country:  England    
Other Details:
Languages:  eng     Pagination:  251-63     Citation Subset:  IM    
Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.
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MeSH Terms
Irritable Bowel Syndrome / physiopathology*
Middle Aged
Pain / physiopathology*
Rectum / physiopathology*
Sensory Thresholds

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

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