Mechanisms of Pharyngeal Collapse in Sleep Apnea, Study D

Status Withdrawn

Clinical Trial Summary

In obstructive sleep apnea (OSA), the upper airway recurrently closes during sleep. The mechanisms that lead to airway closure are not completely understood. Some studies have shown that there is progressive narrowing of the pharyngeal airway across breaths during expiration (Progressive Expiratory Narrowing, PEN) preceding an obstructive apnea. The investigators will assess the viscoelastic properties of the pharyngeal airway and its role in PEN.

Clinical Trial Description

In obstructive sleep apnea, the upper airway recurrently closes during sleep. The mechanisms that lead to airway closure are not completely understood. Some studies have shown that there is progressive narrowing of the pharyngeal airway across breaths during expiration (Progressive Expiratory Narrowing, PEN) preceding an obstructive apnea.

The investigators will test how the viscoelastic properties of the airway influence PEN. To this end, the investigators will visualize the pharynx of sleep apnea patients using a thin endoscope and will induce central apneas during sleep. Pharyngeal cross-sectional area will be recorded during incremental changes in pharyngeal pressure during central apneas. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT01733784
Study type	Interventional
Source	Brigham and Women's Hospital
Contact
Status	Withdrawn
Phase	N/A
Start date	December 8, 2012
Completion date	February 7, 2017

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