| Functional activity of the rectum: A conduit organ or a storage organ or both? | |
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MedLine Citation:
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PMID: 16874870 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIM: To investigate whether the degree of rectal distension could define the rectum functions as a conduit or reservoir. METHODS: Response of the rectal and anal pressure to 2 types of rectal balloon distension, rapid voluminous and slow gradual distention, was recorded in 21 healthy volunteers (12 men, 9 women, age 41.7 +/- 10.6 years). The test was repeated with sphincteric squeeze on urgent sensation. RESULTS: Rapid voluminous rectal distension resulted in a significant rectal pressure increase (P < 0.001), an anal pressure decline (P < 0.05) and balloon expulsion. The subjects felt urgent sensation but did not feel the 1st rectal sensation. On urgent sensation, anal squeeze caused a significant rectal pressure decrease (P < 0.001) and urgency disappearance. Slow incremental rectal filling drew a rectometrogram with a "tone" limb representing a gradual rectal pressure increase during rectal filling, and an "evacuation limb" representing a sharp pressure increase during balloon expulsion. The curve recorded both the 1st rectal sensation and the urgent sensation. CONCLUSION: The rectum has apparently two functions: transportation (conduit) and storage, both depending on the degree of rectal filling. If the fecal material received by the rectum is small, it is stored in the rectum until a big volume is reached that can affect a degree of rectal distension sufficient to initiate the defecation reflex. Large volume rectal distension evokes directly the rectoanal inhibitory reflex with a resulting defecation. |
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Authors:
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Ahmed Shafik; Randa M Mostafa; Ismail Shafik; Olfat Ei-Sibai; Ali A Shafik |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: World journal of gastroenterology : WJG Volume: 12 ISSN: 1007-9327 ISO Abbreviation: World J. Gastroenterol. Publication Date: 2006 Jul |
Date Detail:
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Created Date: 2006-07-28 Completed Date: 2006-10-31 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100883448 Medline TA: World J Gastroenterol Country: China |
Other Details:
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Languages: eng Pagination: 4549-52 Citation Subset: IM |
Affiliation:
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Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt. shafik@ahmedshafik.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Anal Canal / physiology Balloon Dilatation Constipation / physiopathology Defecation / physiology* Feces* Female Humans Male Middle Aged Pressure Rectum / physiology* Reflex / physiology Sigmoidoscopy |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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