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Related Experiment Videos

Measuring the anorectal angle.

M Hero, P Arhan, G Devroede

    Journal of Biomedical Engineering
    |October 1, 1985
    PubMed
    Summary
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    Researchers studied children with chronic idiopathic constipation, finding that many exhibit

    Area of Science:

    • Pediatric Gastroenterology
    • Physiology

    Background:

    • Chronic idiopathic constipation is a common pediatric condition.
    • Understanding the underlying mechanisms of defecation is crucial for effective treatment.

    Purpose of the Study:

    • To quantitatively assess the anorectal angle in children with chronic idiopathic constipation.
    • To investigate potential defecation dysfunctions related to anorectal angle dynamics.

    Main Methods:

    • Lateral radiographs of the rectum and anus were obtained from 90 children.
    • A computer program was utilized for objective, quantitative assessment of the anorectal angle.
    • Measurements were taken at rest, during attempted anal contraction, and during attempted defecation.

    Main Results:

    Related Experiment Videos

    • The average anorectal angle at rest was 120 degrees.
    • A significant percentage of children (24%) decreased their anorectal angle during attempted defecation, contrary to normal function.
    • Another group (21%) increased their anorectal angle during attempted anal contraction, mimicking defecation.

    Conclusions:

    • The study identified 'sphincteric disobedience,' a novel defecation dysfunction, in a notable proportion of children with chronic idiopathic constipation.
    • This abnormal anorectal angle behavior during defecation attempts may be a key factor contributing to constipation symptoms in affected children.
    • These findings suggest a need for targeted interventions addressing anorectal manometry and coordination in pediatric constipation management.