“…In the US and European countries, UAS using a hypoglossal nerve stimulation device has been approved for several years, and the efficacy of UAS was prominent, especially in less obese patients. [6] As patients do not need to wear masks and oral appliances during sleep, adherence may not be an issue with UAS. Thus, UAS can be an effective alternative, especially in patients with OSA who failed to comply with CPAP and MAD treatment.…”