The Efficacy of Tongue Stabilizing Device in Patients With Obstructive Sleep Apnea

The coordination of swallowing and breathing is an important mechanism because the route for air and deglutition is partly shared in the pharynx. Tongue Stabilizing Device (TSD) is a preformed appliance for Obstructive Sleep Apnea (OSA) that protrudes the tongue and improves upper airway structure and function during sleep. Investigators will attempt to assess efficacy of TSD therapy on OSA and the physiological change of swallowing and breathing routes in OSA patients during sleep.