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Is a 'safe swallow' really safe?

L J Hirst1, A Sama, P N Carding

  • 1Department of Speech Therapy, Freeman Hospital, High Heaton, Newcastle upon Tyne.

International Journal of Language & Communication Disorders
|May 27, 1999
PubMed
Summary
This summary is machine-generated.

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Most individuals do not fully close their vocal cords during breath holds, impacting the effectiveness of the supraglottic safe swallow technique. This study highlights potential issues with current teaching methods for this swallowing strategy.

Area of Science:

  • Otolaryngology
  • Speech-Language Pathology
  • Physiology

Background:

  • The supraglottic safe swallow technique is crucial for preventing aspiration in individuals with dysphagia.
  • This technique involves a voluntary breath hold to protect the airway.
  • Adequate vocal cord adduction is essential for airway protection during breath holding.

Purpose of the Study:

  • To investigate the degree of vocal cord adduction during breath holding in healthy adults.
  • To determine if normal subjects achieve complete vocal cord closure when performing a breath hold similar to the supraglottic safe swallow technique.

Main Methods:

  • Utilized fiberoptic nasendoscopy to visualize the larynx and vocal cords.
  • Assessed 45 healthy subjects performing a breath hold maneuver.

Related Experiment Videos

  • Quantified the duration and completeness of vocal cord adduction during the breath hold.

    • Main Results:

    • A significant percentage of subjects (57.7%) failed to achieve full vocal cord adduction throughout the entire breath hold duration.
    • Incomplete vocal cord closure was observed in a majority of the healthy participants.
    • Variability in the timing and extent of adduction was noted.

    Conclusions:

    • Current breath-holding instructions for the supraglottic safe swallow technique may not elicit complete vocal cord adduction in a large proportion of healthy individuals.
    • Findings suggest a need to re-evaluate and potentially refine teaching methodologies for the supraglottic safe swallow technique to ensure optimal airway protection.
    • Further research is warranted to explore factors influencing vocal cord adduction during breath holds and to develop improved training strategies.