Changes in sleep posture have been shown to improve obstructive sleep apnea (OSA). To
investigate the mechanisms by which this occurs we assessed upper airway stability in eight …

Fast-CT scanning was used to study the effects of changes in body position on upper airway
(UA) size and shape in 11 awake subjects with obstructive sleep apnea (OSA). Six patients …

Ventilatory instability may play an important role in the pathogenesis of obstructive sleep
apnea. We hypothesized that the influence of ventilatory instability in this disorder would …

Previous studies have demonstrated that lung volume during wakefulness influences upper
airway size and resistance, particularly in patients with sleep apnea. We sought to determine …

Abstract Study Objectives: Certain respiratory control characteristics determine whether
patients with collapsible upper airway develop stable or unstable breathing during sleep …

We investigated whether cephalometric measurements, nocturnal indices of negative
intrathoracic pressure, or the frequency of sleep-related breathing disorders were related to …

We studied 18 patients with obstructive sleep apnea (OSA). Each subject slept while
breathing through the nose with a specially designed valveless breathing circuit. Low levels …

The present study was conducted to determine the effects of body position and sleep state,
as well as the effect of uvulopalatopharyngoplasty (UPPP) on the regions over which the …

We hypothesized that the increased arousal threshold to upper airway occlusion exhibited
by patients with obstructive sleep apnea (OSA) is in part secondary to the disease process …

To determine whether the pharyngeal airway is abnormal in awake patients with obstructive
sleep apnea (OSA), we measured the ability of the pharyngeal airway to resist collapse from …