| Recruiting | Buteyko Breathing and Approach of Smoking Hygiene: Effects on Dysfucntion of Eustachian Tube and Lung Function NCT07236580 | Cairo University | N/A |
| Completed | Hearing/ET/Vestibular in Balloon Pilots NCT07200310 | Gaziosmanpasa Research and Education Hospital | — |
| Recruiting | Efficacy of Buteyko Breathing in Seniors With Chronic Eustachian Tube Dysfunction NCT07193485 | Cairo University | N/A |
| Completed | Evaluation of Eustachian Tube Function With 226 and 1000 Hz Probes in Children Undergoing Tonsillectomy ± Aden NCT06577051 | Sumeyra DOLUOGLU | — |
| Not Yet Recruiting | Long-term Assessment of Balloon Eustachian Tuboplasty for Obstructive Eustachian Tube Disease NCT05998356 | University Hospital, Montpellier | N/A |
| Recruiting | Efficacy of Balloon Dilation of the Eustachian Tube in Eustachian Tube Dilatory Dysfunction NCT05719207 | University of Calgary | N/A |
| Unknown | The Accuracy of Sonotubometry to Assess the Eustachian Tube NCT05740384 | James Tysome | N/A |
| Unknown | The Evaluation of Eustachian Tube Function and Its Influencing Factors After Snoring Operation in Children NCT05600595 | Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University | — |
| Unknown | FFP3 Respirators and Ears - Effects on Middle Ear Pressure and Hearing NCT05222230 | Liverpool University Hospitals NHS Foundation Trust | N/A |
| Recruiting | Effect of Novel Exhalational Delivery System With Fluticasone (EDS-FLU) on Eustachian Tube Dysfunction (ETD) NCT05275686 | Cedars-Sinai Medical Center | Phase 2 |
| Unknown | Pretympanoplasty Assessment of Patency and Mucociliary Function of Eustachian Tube NCT05229380 | Assiut University | — |
| Terminated | Balloon Dilation of the Eustachian Tube NCT05270031 | Sunnybrook Health Sciences Centre | N/A |
| Unknown | Effect of Rate (Slope) of Compression on the Incidence of Symptomatic ETD and MEB: a Phase III Prospective Stu NCT04804098 | Northwell Health | N/A |
| Recruiting | Balloon Sinuplasty Efficiency in Maxillary Rhinosinusitis. NCT04645511 | Tampere University Hospital | N/A |
| Unknown | Ph.D.-Project: Eustachian Tube Dysfunction: Causes, Diagnosis, Treatment, and Prognosis NCT05055115 | Regional Hospital West Jutland | N/A |
| Completed | Eustachian Tube Dilation With an Endovascular Balloon NCT04809753 | Sunnybrook Health Sciences Centre | N/A |
| Completed | SinuSonic for ETD and Facial Pain: Acoustic Vibration + Oscillating Expiratory Pressure NCT04404036 | Medical University of South Carolina | N/A |
| Completed | Autoinflation as a Eustachian Tube Rehabilitation NCT07122999 | Pusan National University Hospital | N/A |
| Withdrawn | Tympanostomy Tubes Versus Eustachian Tube Dilation NCT03886740 | Columbia University | N/A |
| Unknown | Obstructive Sleep Apnea Syndrome (OSAS) and Dizziness NCT03850353 | Tel-Aviv Sourasky Medical Center | — |
| Completed | Tubomanometry and EarPopper Devices for Eustachian Tube Function Testing NCT03850197 | Cuneyt M. Alper | — |
| Completed | XprESS ET Registry NCT04136977 | Entellus Medical, Inc. | — |
| Unknown | Balloon Dilation of the Eustachian Tube, a Lower Pressure Challenge NCT03322579 | Hillel Yaffe Medical Center | N/A |
| Unknown | Correlation Analysis Between ETF and Prognosis of Tympanoplasty NCT03424369 | Eye & ENT Hospital of Fudan University | — |
| Completed | Adult Study to Evaluate Placement of Tympanostomy Tubes In-office (ADEPT) NCT03197558 | Tusker Medical | Phase 2 |
| Withdrawn | Feasibility Study of Balloon Eustachian Tuboplasty (BET) NCT02631187 | University Hospital Plymouth NHS Trust | N/A |
| Completed | The Accuracy of Tests of Eustachian Tube Function NCT02385175 | Cambridge University Hospitals NHS Foundation Trust | — |
| Completed | XprESS Eustachian Tube Dilation Study NCT02391584 | Entellus Medical, Inc. | N/A |
| Completed | Effect of Total Compression Time and Rate (Slope) on Incidence of Symptomatic ETD and MEB: A Phase II Prospect NCT04776967 | Northwell Health | N/A |
| Completed | Balloon Dilation in Selected Subjects With Refractory Eustachian Tube Dysfunction NCT02114762 | University of Pittsburgh | N/A |
| Completed | Study of Safety and Efficacy for the Eustachian Tube Balloon Catheter NCT02087150 | Integra LifeSciences Corporation | N/A |
| Completed | Eustachian Tube Dysfunction Assessment NCT02667301 | Stratejik Yenilikci Girisimler Ltd. | N/A |
| Terminated | Gas Supply, Demand and Middle Ear Gas Balance -- Diagnosis of Eustachian Tube Dysfunction NCT01974726 | University of Pittsburgh | N/A |
| Withdrawn | Refractory Eustachian Tube Dysfunction: Are the Symptoms Related to Endolymphatic Hydrops NCT01661777 | Vanderbilt University | N/A |
| Completed | What is the Tympanic Membrane Healing Time After Insertion of a Gelfoam PE Tube? NCT04902963 | Skovlund Medical Products, LLC | N/A |
| Completed | Risk Factors and Potential Causes of Eustachian Tube Dysfunction in Adults NCT01251432 | University of Pittsburgh | — |
| Withdrawn | The Study of Eustachian Tube Dysfunction and Laryngopharyngeal Reflux NCT02123498 | Loma Linda University | Phase 4 |