Long-term Evaluation of Nasopharyngeal Airway in Hypotonia

Inclusion Criteria: * Children with Hypotonic Upper Airway Obstruction (HUAO) that took part in the original study (HUM00189669/NCT04846400 or HUM00220966/NCT05527652 trials) * Willingness to continue device usage. * Confirmed diagnosis of OSA (apnea/hypopnea index; AHI \> 10 or AHI \>5 with lowest oxygen level ≤75%) * At least one symptom of OSA (such as frequent snoring, daytime sleepiness, or hyperactive/inattentive behaviors) * Previous adenotonsillectomy (unless tonsillectomy not possible) * Tonsil size 2+ or smaller Exclusion Criteria: * Participants that were non-compliant with the Self-Supporting Nasopharyngeal Airway (ssNPA) device during participation in the parent study listed above * Any medical reason why ssNPA therapy may not be suitable * Active COVID 19 infections Moderate/severe tracheobronchomalacia * Need for anticoagulative therapy * Bleeding disorder * Restrictive thoracic disorders