Abstract:
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.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Shafik A,Mostafa RM,Shafik I,Ei-Sibai O,Shafik AAdoi
10.3748/wjg.v12.i28.4549subject
Has Abstractpub_date
2006-07-28 00:00:00pages
4549-52issue
28eissn
1007-9327issn
2219-2840journal_volume
12pub_type
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.15.4392
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pub_type: 杂志文章
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pub_type: 杂志文章,meta分析,评审
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pub_type: 杂志文章
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pub_type: 评论,信件
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更新日期:2011-11-28 00:00:00
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pub_type: 杂志文章,评审
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pub_type: 杂志文章,评审
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pub_type: 杂志文章,随机对照试验
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更新日期:2016-02-07 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2016-07-28 00:00:00