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Related Experiment Videos

Rib cage mobility in pectus excavatum.

J Mead, P Sly, P Le Souef

    The American Review of Respiratory Disease
    |December 1, 1985
    PubMed
    Summary
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    Pectus excavatum, a chest deformity, does not appear to limit rib cage mobility or alter abdominal pressure swings during breathing in children. This study found no significant differences between patients and controls.

    Area of Science:

    • Pediatric Pulmonology
    • Thoracic Surgery
    • Respiratory Physiology

    Background:

    • Pectus excavatum is often cosmetic but can cause chest pain and exercise limitation in children.
    • Limited rib cage mobility in pectus excavatum may increase breathing's oxygen cost.
    • Altered rib cage mechanics could lead to increased abdominal pressure swings during respiration.

    Purpose of the Study:

    • To test the hypothesis that pectus excavatum is associated with decreased rib cage mobility.
    • To investigate if pectus excavatum affects abdominal pressure dynamics during breathing.

    Main Methods:

    • Compared rib cage mobility and abdominal pressure swings in 11 children with pectus excavatum and 11 controls.
    • Measured gastric pressure (index of abdominal pressure) and respiratory flow.

    Related Experiment Videos

  • Analyzed pressure-volume loops at rest, after exercise, and during maximal inspiration.

    • Main Results:

    • No significant differences in abdominal pressure swings were observed between pectus excavatum patients and controls.
    • Both groups exhibited increased gastric pressure during resting inspiration.
    • Abdominal pressure changes at end-inspiration were similar post-exercise and at total lung capacity.

    Conclusions:

    • Pectus excavatum in children does not appear to be associated with decreased rib cage mobility affecting respiratory mechanics.
    • Abdominal pressure dynamics during breathing are not significantly altered by pectus excavatum.
    • The findings suggest other factors may contribute to exercise limitation in pectus excavatum.