Long-term Assessment of Balloon Eustachian Tuboplasty for Obstructive Eustachian Tube Disease

Inclusion Criteria: * Aged between 18 and 85 years * Clinical symptoms of OETD with Eustachian tubal score less or equal to 7/14 * Failure of well conducted medical treatment (GERD, allergy, rhinosinusitis) including pressure equalization device used for 1 month or more * ASA score 1 or 2 (ASA : American Society of Anesthesiologists) Exclusion Criteria: * Palatal cleft * Anatomical anomaly of pharyngeal Eustachian tube ostium on the treated side * Medical history of nasopharyngeal radiotherapy * Medical history of middle ear surgery (except myringotomy and/or tympanostomy tube) * Eardrum perforation in the treated side * Contraindication of general anesthesia, or major risk of general anesthesia including ASA scores of 3 and 4 * Major nasal obstruction ipsilateral to the Eustachian tube to treat * Medical history of previous Eustachian Tube Dilation * Pregnant or nursing woman, or in childbearing age and not willing to use contraception * Inclusion in another interventional clinical trial * Protected and vulnerable adult * Not covered by Health insurance * Refusal to sign informed consent form * Subjects unable to attend all scheduled visits or to comply with all trial procedures