Prospective Evaluation of a Palato-Pharyngeal Implant System (PPIS) Obstructive Sleep Apnea Syndrome (OSAS)

Inclusion Criteria: * • Socially disturbing snoring and obstructive sleep apnea syndrome with AHI≥10/h * Predominantly retropalatal obstructions established either by: * Drug-induced sedation nasendoscopy * or ApneaGraph ≥60% (optional) * or successful application of the Velumount palatal device (optional) * Findings for predominantly retropalatal obstructions in ENT-examination: * No tonsils or tonsils grade I * Normal finding of larynx and tongue base, no omega-shaped epiglottis * No lingual tonsil hypertrophy * ASA (American Society of Anaesthesiology, 1963) classes I or II * Body mass index (BMI) \< 30 kg/m2 * Age \> 18 yrs * Fix bed partner * Ability to read and understand the patient's information Exclusion Criteria: * • Previous Pillar implants * Medartis palatinal implant (from previous phase I study) * Previous airway surgery other than nasal, adenoid, tonsil or UPPP * Presence of other sleep disorders * Psychiatric disorders * Neurological disorders (e.g. Cerebrovascular injury) * Dysmorphia of the cranial skeleton * Pregnancy or breastfeeding * Known hypersensitivity to nitinol * Participation in another clinical study * Recurrent tonsillitis with prescription of antibiotics during the last 2 years (≥3x/year) * Omega-shaped epiglottis * Lingual tonsil hypertrophy * Kinking of the internal carotid artery