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Airway protection during breath-holding
1Department of Otolaryngology, Mount Sinai Hospital, Toronto, Canada.
The Annals of Otology, Rhinology, and Laryngology
|December 1, 1993
Summary
Laryngeal closure during breath-holding is inconsistent, with some individuals showing glottic opening. Maneuvers like straining enhance airway protection by increasing laryngeal closure levels.
Area of Science:
- Otolaryngology
- Physiology
Background:
- Laryngeal function during breath-holding remains poorly understood.
- Complete laryngeal closure is critical for the supraglottic swallow, a key airway protection mechanism.
Purpose of the Study:
- To prospectively investigate vocal cord position during breath-holding in adults.
- To determine the consistency and variability of laryngeal closure during breath-holding.
Main Methods:
- Prospective study involving 10 adult subjects.
- Nasolaryngoscopy with video recording to visualize vocal cord position during breath-holding.
Main Results:
- Vocal cord position during breath-holding was inconsistent among subjects.
- Some subjects exhibited complete glottic closure, while others had partial opening.
- Straining or vocalizing at the start of breath-holding promoted both glottic and supraglottic closure.
Conclusions:
- Laryngeal closure during breath-holding is variable and not always complete.
- Maneuvers like straining can enhance airway protection by increasing laryngeal closure.
- Nasolaryngoscopy is a valuable clinical tool for assessing airway protection during breath-holding and swallowing maneuvers.