Fluctuating Flow. Vibrato, Tremolo, or Upper Airway Oscillation (original) (raw)
Abstract
We describe a case of a 48-year-old woman with an incidental finding on a research polysomnogram, which posed an interesting differential diagnosis elucidated with the aid of advanced diagnostic methods. This case illustrates the utility of quantitative airflow assessment during sleep in the evaluation of involuntary upper airway phasic activity.
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- Chin EMG* Low Frequency Oscillations Inspiratory phase EMG Inspiratory High frequency >30Hz
- Inspiratory and Expiratory oscillations <3Hz