Treatment Failure of Continuous Positive Airway Pressure (CPAP) in Patients With Obstructive Sleep Apnea Syndrome (OSA): A Trial Comparing Polysomnography and the Sunrise Device to Drive Treatment-Adjustment Decisions.

Inclusion Criteria: * Adults aged 18 to 85 years * Patients treated with Resmed CPAP * Residual apnea-hypopnea index under CPAP (rAHI(CPAP) \> 10 events/hour) * Access to a smartphone and home internet connection, and ability to use a mobile application * Signed informed consent * Affiliated with, or beneficiary of, a national health insurance program Exclusion Criteria: * Severe chronic obstructive or restrictive pulmonary disease, with or without supplemental oxygen * Unstable cardiovascular disease or severe heart failure requiring hospitalization within the past 3 months, or meeting New York Heart Association (NYHA) class III or IV criteria * Conditions affecting mandibular condyle rotation or temporomandibular joint function * Refusal to shave excessive facial hair when required for proper placement of the Sunrise device * Participation in another interventional clinical study or currently within an exclusion period of another study * Individuals who, in the investigator's judgment, are unlikely to comply with study procedures or requirements * Individuals who cannot be contacted in case of emergency * Persons protected under French Public Health Code articles L1121-5, L1121-6, and L1121-8 (including pregnant or breastfeeding women, persons deprived of liberty, individuals under psychiatric care under articles L.3212-1 or L.3213-1, individuals admitted to healthcare or social institutions for reasons other than research, and persons under legal protection or unable to provide informed consent) * Staff members with a hierarchical relationship to the principal investigator