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Related Experiment Videos

Experimental results do not support a gas reserve function for the mastoid.

W J Doyle1

  • 1Department of Pediatric Otolaryngology, Children's Hospital of Pittsburgh, and University of Pittsburgh School of Medicine, 3705 Fifth Ave., Pittsburgh, PA 15213, USA. docdoyle@ix.netcom.com

International Journal of Pediatric Otorhinolaryngology
|June 8, 2000
PubMed
Summary

The mastoid

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Area of Science:

  • Otolaryngology and biomedical engineering.

Background:

  • The mastoid's development correlates with middle ear disease history.
  • The mastoid's precise function remains unclear, with hypotheses including pressure buffering, gas reserve, and pressure regulation.

Purpose of the Study:

  • To present a physical model of the mastoid.
  • To test the validity of the hypothesized gas reserve function.
  • To re-evaluate existing data on the mastoid's pressure-regulating function.

Main Methods:

  • A physical model of the mastoid was developed to generate testable predictions.
  • Data from three clinical experiments were analyzed for consistency with the model's predictions.

Main Results:

  • The physical model's predictions led to the rejection of the gas reserve hypothesis.

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  • Reinterpretation of existing data within the model's framework did not support a pressure-regulating function for the mastoid.

    • Conclusions:

    • The mastoid does not appear to function as a gas reserve.
    • Current evidence, when analyzed through the proposed physical model, does not support a pressure-regulating role for the mastoid in the middle ear.