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Related Experiment Videos

Changes in pharyngeal dimensions effected by chin tuck

M V Welch1, J A Logemann, A W Rademaker

  • 1Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL 60208.

Archives of Physical Medicine and Rehabilitation
|February 1, 1993
PubMed
Summary

Tucking the chin shifts pharyngeal structures backward, narrowing the laryngeal entrance for improved airway protection. This study analyzed pharyngeal dimensions to understand these protective airway changes.

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Area of Science:

  • Anatomy
  • Physiology
  • Radiology

Background:

  • Pharyngeal dimensions play a crucial role in airway function and protection.
  • Understanding head posture effects on the pharynx is vital for clinical applications.

Purpose of the Study:

  • To measure and compare pharyngeal dimensions in neutral head position versus chin-tucked position.
  • To assess the impact of chin-tucking on airway protection mechanisms.

Main Methods:

  • Lateral radiographic views of the oral cavity and pharynx were obtained for 30 subjects in two head positions: neutral and chin-tucked.
  • Pharyngeal dimensions were quantified using three angle and three distance measures from videoprints.
  • A 1-cm metal ruler was used to correct for radiographic magnification.

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Main Results:

  • Chin-tucking caused a posterior shift of anterior pharyngeal structures.
  • The laryngeal entrance and the distance from the epiglottis to the pharyngeal wall were narrowed.
  • The angle of the epiglottis to the anterior tracheal wall widened.

Conclusions:

  • The posterior shift of pharyngeal structures during chin-tucking enhances airway protection.
  • These changes in pharyngeal dimensions have significant clinical implications for airway management.