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Related Experiment Videos

Anorectal function and defecation dynamics in patients with rectal prolapse.

A M Metcalf1, V Loening-Baucke

  • 1Department of Surgery, University of Iowa Hospitals and Clinics, Iowa City 52242.

American Journal of Surgery
|February 1, 1988
PubMed
Summary

Rectal prolapse patients exhibit impaired sphincter function and reduced rectal capacity. Abnormal muscle activity during attempted defecation may contribute to prolapse and sphincter injury.

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Area of Science:

  • Gastroenterology
  • Colorectal Surgery
  • Pelvic Floor Disorders

Background:

  • Rectal prolapse is a condition affecting anorectal function.
  • Understanding the underlying physiological abnormalities is crucial for effective treatment.

Purpose of the Study:

  • To investigate anorectal manometry, external sphincter electromyography, and saline continence in female rectal prolapse patients.
  • To compare these functions with healthy female controls.

Main Methods:

  • Anorectal manometry
  • External sphincter electromyography
  • Saline continence testing

Main Results:

  • Rectal prolapse patients showed significantly decreased resting anal tone, maximum voluntary squeeze, and rectal functional capacity.

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  • During defecation attempts, control subjects relaxed their external sphincter/pelvic floor, while prolapse patients exhibited increased electromyographic activity.
  • Continence to saline was significantly impaired in prolapse patients.

    • Conclusions:

    • Patients with rectal prolapse have impaired resting and voluntary sphincter activity and decreased functional rectal capacity.
    • Failure of normal relaxation during defecation attempts may contribute to prolapse and sphincter injury.
    • Abnormal anorectal function persisted even after surgical repair in a small cohort.