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Anal sphincteric pressure studies in complete rectal prolapse.

S A Obeid, H Zidan, M A Hassab

    Diseases of the Colon and Rectum
    |July 1, 1979
    PubMed
    Summary
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    Complete rectal prolapse is linked to a weaker external anal sphincter, not the internal one. This sphincter weakness impacts anal continence, as patients struggle to maintain muscle contraction.

    Area of Science:

    • Colorectal surgery
    • Gastroenterology
    • Pelvic floor disorders

    Background:

    • Complete rectal prolapse is a condition affecting the pelvic floor.
    • Anal sphincter function is crucial for maintaining continence.

    Purpose of the Study:

    • To investigate the role of anal sphincteric pressure in complete rectal prolapse.
    • To differentiate the functional capacity of the internal and external anal sphincters in prolapse patients.

    Main Methods:

    • Anal manometry was used to measure resting and maximal pressures of the internal and external anal sphincters.
    • Patients with complete rectal prolapse were compared to healthy control subjects.

    Main Results:

    • Internal anal sphincter resting pressure showed no significant difference between patients and controls.

    Related Experiment Videos

  • Maximal external anal sphincter pressure was significantly lower in patients with complete rectal prolapse.
  • Sustained external anal sphincter contraction for over 40 seconds was necessary for continence, a threshold not met by incontinent patients.

    • Conclusions:

    • The internal anal sphincter does not appear to play a role in the etiology of complete rectal prolapse.
    • Weakness of the external anal sphincter is a significant factor in the pathophysiology of complete rectal prolapse and associated incontinence.
    • External anal sphincter functional capacity is critical for maintaining anal continence.