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Related Experiment Videos

Colorectal transport in normal defaecation.

K Krogh1, N Olsen, P Christensen

  • 1Surgical Research Unit, Department of Surgery L, University Hospital of Aarhus, Tage Hansensgade 2, 8000 Aarhus C, Denmark. Krogh@aaa.dk

Colorectal Disease : the Official Journal of the Association of Coloproctology of Great Britain and Ireland
|June 5, 2003
PubMed
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This study established normal colorectal transport values using scintigraphy, revealing significant day-to-day variations and common antegrade/retrograde movements during defecation.

Area of Science:

  • Gastroenterology
  • Nuclear Medicine
  • Physiology

Background:

  • Assessing colorectal luminal transport during defecation is crucial.
  • Normal values and variations in colorectal transport are not well-established.
  • Scintigraphy offers a method for this assessment.

Purpose of the Study:

  • To describe colorectal transport during normal defecation using a novel scintigraphy technique.
  • To determine inter- and intra-individual variations in colorectal transport.
  • To establish normal reference values for colorectal emptying.

Main Methods:

  • Thirty healthy volunteers underwent scintigraphy over two consecutive days.
  • Colorectal contents were quantified before and after defecation.
  • Antegrade and retrograde transport within the colorectum were computed for each segment.

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Main Results:

  • Median colorectal emptying was 99% of the rectosigmoid, with no sex difference.
  • Significant day-to-day variation (dispersion=52%) was observed.
  • Extensive antegrade and retrograde movements within the colorectum were common during defecation.

Conclusions:

  • Scintigraphy before and after defecation provides detailed insights into colorectal emptying.
  • Inter- and intra-individual variations in colorectal transport are substantial.
  • Antegrade and retrograde transport are frequent occurrences during defecation.