While<unk>  can be hard to diagnose, due to the Eustachian<unk> s and the nasopharynx not being easily visible, usually a tympanometry is indicated, along with findings on an otoscopy. For cases of baro-challenge induced<unk> , diagnosis usually relies on the history of the patient and their reported symptoms, as otoscopy and tympanometry is sometimes normal at normal ambient pressure. Opening pressure has been proposed as a method for preoperative and intraoperative evaluation of any obstructive process within the Eustachian<unk> . As well, Valasalva CT scanning using advanced 64 slice or higher machines has been proposed as a way of diagnosing and localizing anatomic obstruction within the Eustachian<unk> .
Eustachian tube dysfunction
Patulous Eustachian tube
Velopharyngeal insufficiency
Laryngotracheal stenosis
Laryngomalacia
Nasal septum deviation
Adventitial cystic disease
Laryngo-onycho-cutaneous syndrome