Chest
Volume 107, Issue 1, January 1995, Pages 67-73
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Clinical Investigations: Sleep/Breathing: Articles
The Effect of Electrical Stimulation on Obstructive Sleep Apnea Syndrome

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Patients with severe obstructive sleep apnea polygraphically documented underwent electrical stimulation treatment trials. Submental and intraoral stimulations were applied during waking and during nocturnal sleep. The stimulation was applied using a custom-designed neuromuscular electrical stimulator (EdenTec Corp) providing symmetric biphasic constant voltage pulses. Pulse duration of each phase was set to 80 μ s based on a subjective evaluation of pulse durations from 80 to 300 μ s to minimize sensation while generating equivalent motor responses. Pulse repetition rate was set to 50 pulses per second. Cephalometric radiographs and endoscopies were obtained with and without stimulations during waking. Most commonly, stimulations induced alpha EEG arousals. Submental subcutaneous stimulation induced good contractions of platysmal muscles but had no impact on the upper airway. Intraoral stimulation induced clear tongue muscle movements but with change of shape of the upper airway and posterior movements of the tongue. Each time a breakage of apnea was noted, it was associated with a time-linked alpha EEG arousal. The results obtained by us and others do not, at this time, give convincing support for the use of electrical stimulation using submental surface or intraoral electrodes as a viable approach for effective control of obstructive sleep apnea syndrome symptoms.

Key words

airway patency
electrical stimulation
obstructive sleep apnea

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Supported by National Institute of Aging Grant RR-07772 and by the General Clinical Research Center Grant RR-00070 from the National Institutes of Health.