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. 1988 Apr;81(4):1051–1055. doi: 10.1172/JCI113416

Paradoxical glottic narrowing in patients with severe obstructive sleep apnea.

I Rubinstein 1, A S Slutsky 1, N Zamel 1, V Hoffstein 1
PMCID: PMC329630  PMID: 3350963

Abstract

Most patients with obstructive sleep apnea have increased pharyngeal collapsibility (defined in the present study as an increased lung volume dependence of pharyngeal area), which predisposes them to upper airway occlusion during sleep. However, there are patients with severe obstructive sleep apnea who have low-normal pharyngeal collapsibility. The factors leading to nocturnal upper airway obstruction in such patients have not been ascertained. We studied 10 overweight male patients with severe obstructive sleep apnea and low-normal pharyngeal collapsibility to determine the site of upper airway pathology in these patients. We found that all 10 patients exhibited paradoxical inspiratory narrowing of the glottis during quiet tidal breathing. This phenomenon was not observed in a matched group of 10 snoring, nonapneic male controls. We conclude that paradoxical glottic narrowing may be a contributing factor in the pathogenesis of upper airway obstruction in patients with severe obstructive sleep apnea who have low-normal pharyngeal collapsibility.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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