Laryngo- rhino- otologie
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Anatomical basis of obstructive sleep apnea (OSA) is the collapse of the pharynx during sleep. It is considered as a result of complex interactions of structural and neuromuscular factors. Depth of sleep and body position have modulating effects. ⋯ This study revealed that HNS can prevent the pharyngeal collapse without waking up the patient from sleep. The HNS with this device resulted in a significant improvement of both objective and subjective parameters of the severity of OSA. Electrical stimulation of the hypoglossal nerve is a new treatment for patients with moderate to severe OSA, who do not tolerate standard treatment.