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Sonographic Characteristics of Rectal Sensations in Healthy Females.

Örnö, Ann-Kristin LU ; Herbst, Andreas LU and Marsal, Karel LU (2007) In Diseases of the Colon & Rectum 50(1). p.64-68
Abstract
PURPOSE: This study was designed to characterize rectal sensations by visualizing the internal and external anal sphincter and intra-anal transport of bolus during elicited rectal sensations. METHODS: The anal canal was visualized with real-time transperineal ultrasonography in 13 healthy female volunteers. Rectal sensations were elicited by injecting water into the rectum. The ultrasound images were recorded on a videotape and analyzed offline. RESULTS: The median time between an injection of water and the events studied was calculated in 105 rectal sensations. A relaxation in the internal anal sphincter (4 seconds after the injection of water), an antegrade transport of bolus (4 seconds) into the anal canal, and a contraction in the... (More)
PURPOSE: This study was designed to characterize rectal sensations by visualizing the internal and external anal sphincter and intra-anal transport of bolus during elicited rectal sensations. METHODS: The anal canal was visualized with real-time transperineal ultrasonography in 13 healthy female volunteers. Rectal sensations were elicited by injecting water into the rectum. The ultrasound images were recorded on a videotape and analyzed offline. RESULTS: The median time between an injection of water and the events studied was calculated in 105 rectal sensations. A relaxation in the internal anal sphincter (4 seconds after the injection of water), an antegrade transport of bolus (4 seconds) into the anal canal, and a contraction in the external anal sphincter (5 seconds) were observed before a sensation (6 seconds) was reported. The antegrade flow continued until the distal internal anal sphincter contracted (18 seconds) and the bolus moved in a retrograde transport direction (17 seconds) thereafter the sensation disappeared (18 seconds) and the external anal sphincter relaxed (22 seconds). A significant correlation in time between the end of the sensation, contraction in the internal anal sphincter, reversed flow of anal contents, and relaxation of the external anal sphincter was found (Pearson, P<0.01). CONCLUSIONS: The results verified that the internal anal sphincter contributes to the perception of rectal sensations by a relaxation allowing intra-anal bolus to increase the pressure on the anoderm during rectal contraction. A new observation is presented on the time relation between contraction in the distal internal anal sphincter, reversed flow in the anal canal, and the end of rectal sensations. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
rectal sensation, anal continence, anal, incontinence, pelvic floor, ultrasound, internal anal sphincter
in
Diseases of the Colon & Rectum
volume
50
issue
1
pages
64 - 68
publisher
Springer
external identifiers
  • wos:000243135600010
  • scopus:33846455809
ISSN
0012-3706
DOI
10.1007/s10350-006-0728-6
language
English
LU publication?
yes
id
f4d6b4bb-66b9-4fdd-a5bb-f67238d3ee59 (old id 163488)
alternative location
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=17080280&dopt=Abstract
date added to LUP
2007-07-24 08:34:42
date last changed
2017-08-20 03:48:46
@article{f4d6b4bb-66b9-4fdd-a5bb-f67238d3ee59,
  abstract     = {PURPOSE: This study was designed to characterize rectal sensations by visualizing the internal and external anal sphincter and intra-anal transport of bolus during elicited rectal sensations. METHODS: The anal canal was visualized with real-time transperineal ultrasonography in 13 healthy female volunteers. Rectal sensations were elicited by injecting water into the rectum. The ultrasound images were recorded on a videotape and analyzed offline. RESULTS: The median time between an injection of water and the events studied was calculated in 105 rectal sensations. A relaxation in the internal anal sphincter (4 seconds after the injection of water), an antegrade transport of bolus (4 seconds) into the anal canal, and a contraction in the external anal sphincter (5 seconds) were observed before a sensation (6 seconds) was reported. The antegrade flow continued until the distal internal anal sphincter contracted (18 seconds) and the bolus moved in a retrograde transport direction (17 seconds) thereafter the sensation disappeared (18 seconds) and the external anal sphincter relaxed (22 seconds). A significant correlation in time between the end of the sensation, contraction in the internal anal sphincter, reversed flow of anal contents, and relaxation of the external anal sphincter was found (Pearson, P&lt;0.01). CONCLUSIONS: The results verified that the internal anal sphincter contributes to the perception of rectal sensations by a relaxation allowing intra-anal bolus to increase the pressure on the anoderm during rectal contraction. A new observation is presented on the time relation between contraction in the distal internal anal sphincter, reversed flow in the anal canal, and the end of rectal sensations.},
  author       = {Örnö, Ann-Kristin and Herbst, Andreas and Marsal, Karel},
  issn         = {0012-3706},
  keyword      = {rectal sensation,anal continence,anal,incontinence,pelvic floor,ultrasound,internal anal sphincter},
  language     = {eng},
  number       = {1},
  pages        = {64--68},
  publisher    = {Springer},
  series       = {Diseases of the Colon & Rectum},
  title        = {Sonographic Characteristics of Rectal Sensations in Healthy Females.},
  url          = {http://dx.doi.org/10.1007/s10350-006-0728-6},
  volume       = {50},
  year         = {2007},
}