| Not Yet Recruiting | Supplemental Oxygen and Oxygen Desaturations in Colonoscopies NCT07515755 | University of Utah | N/A |
| Completed | Evaluation of Airway Adjuncts for Intubation in Entrapped Patients With Difficult Airway Access NCT06609499 | Uniwersytet Radomski im. Kazimierza Pułaskiego | N/A |
| Completed | Effectiveness Of Apneic Oxygenation During Induction Of General Anesthesia In Children NCT06742476 | Fayoum University Hospital | N/A |
| Unknown | Evaluation of Foreign Body Airway Obstruction Interventions Through Simulation NCT06227234 | University of Calgary | N/A |
| Completed | Supraglottic Airways for Entrapped Trauma Patients NCT06545903 | Uniwersytet Radomski im. Kazimierza Pułaskiego | N/A |
| Completed | LifeVac Survey Study NCT06659796 | LifeVac, LLC | — |
| Terminated | Feasibility of the AveCure Microwave Ablation Technology for the Bronchoscopic Treatment of Malignant Central NCT06105606 | Beth Israel Deaconess Medical Center | N/A |
| Unknown | Role of Parasympathetic Activity in Mild to Severe Asthma With Fixed Airway Obstruction (PARASMA Study) NCT05550402 | Hat Yai Medical Education Center | N/A |
| Completed | Video Game Training on Intervention in Adult Airway Obstruction NCT06843694 | Kahramanmaras Sutcu Imam University | N/A |
| Unknown | Medical Device for Airway Patency During Sedation NCT06270212 | Stairway Medical AB | N/A |
| Unknown | Impact of High Flow Therapy on Complications Related to Airway Stenting NCT06069817 | Cardarelli Hospital | N/A |
| Recruiting | Clinical Utility of Portable Dynamic Chest X Ray (DDR) in the ICU NCT06538376 | Brigham and Women's Hospital | N/A |
| Recruiting | The Efficacy of Distal Pharyngeal Airway for Oxygenation During TEE NCT05974488 | University of Miami | N/A |
| Unknown | Dental Isolation Systems Among Pediatric Patients With Different Airway Patency NCT06128811 | King Abdulaziz University | N/A |
| Completed | In Line Aerosol Nebulization With High Flow NCT05880836 | University of California, Los Angeles | N/A |
| Completed | Wei Nasal Jet Tube vs Nasal Cannula Oxygen Support in Gastrointestinal Endoscopy Patients NCT05783050 | Bezmialem Vakif University | N/A |
| Completed | Anti-Snoring Appliances and Airway Manipulation in Patients Undergoing Anesthetic Sedation NCT05748626 | Northwestern University | N/A |
| Unknown | Evaluation of Medical Device for Airway Patency During Sedation (SW01-2022) NCT05708651 | Stairway Medical AB | N/A |
| Unknown | Effect of Esmolol on Perioperative Stress Reaction NCT05694585 | Xiumei Song | Phase 4 |
| Completed | A Modified Cuff Leak Test and Reintubation in Mechanically Ventilated Patients NCT05550220 | Beijing Chao Yang Hospital | N/A |
| Unknown | VivAer: A Correlation Between Symptom Scores and Objective Findings NCT05573919 | Endeavor Health | N/A |
| Unknown | AI to Improve Data From Danish Cardiac Arrest Registry NCT05308303 | Prehospital Center, Region Zealand | — |
| Active Not Recruiting | Heliox on the Work of Breathing in Adult Patients With Lower Airway Stenosis NCT06457399 | Hospital Universitario 12 de Octubre | — |
| Completed | Efficacy and Tolerance Study on the Use of the In-exsufflator in the Hospitalized Elderly NCT05090696 | University Hospital, Clermont-Ferrand | — |
| Completed | Comparing iView Video Laryngoscope in the Emergency Department NCT04907695 | Brooke Army Medical Center | — |
| Completed | Bergen Oral Respiratory Intervention Study NCT04781153 | Anders Røsland | N/A |
| Unknown | Comparing Human and Computer-based Quantification of Airway Stenosis From Bronchoscopic Images NCT04846153 | Brigham and Women's Hospital | N/A |
| Completed | Sedation Complications in Urology During Spinal Anesthesia With Dexmedetomidine or Midazolam Regarding OSA Ris NCT04817033 | University Hospital of Split | Phase 4 |
| Completed | Effect of Laryngeal Mask Airway on Image Quality n Pediatric Patients Undergoing Magnetic Resonant Imaging NCT04730362 | National Cancer Institute, Egypt | N/A |
| Completed | Relationship Between STOP BANG Score and Airway Management NCT05640856 | Zonguldak Bulent Ecevit University | — |
| Unknown | Effects of Combined Respiratory Muscle Training and Steam Inhalation NCT04584398 | WellO2 Oy | N/A |
| Completed | Self-Directed Versus Traditional Clinical Learning Model on Nurses' Airway Management Competencies NCT04244565 | Cairo University | — |
| Unknown | Risk Prediction of Difficult Tracheal Intubation in OSAHS Patient NCT04506346 | Beijing Tsinghua Chang Gung Hospital | — |
| Withdrawn | Cricothyroidotomy Training for Physicians Outcomes Study NCT03238950 | The Royal Wolverhampton Hospitals NHS Trust | N/A |
| Completed | Scoring System to Predict Depth of Cricothyroid Membrane NCT03656315 | University Hospitals Coventry and Warwickshire NHS Trust | N/A |
| Unknown | Safety and Efficacy of the LMA Supreme When Inserted With Patients in the Prone Position NCT03633942 | Laser Spine Institute | — |
| Completed | Accurate Recognition of Exacerbation of Chronic Obstructive Pulmonary Disease (COPD) NCT03170999 | GlaxoSmithKline | — |
| Completed | SureCRIC Standardized Patient Study NCT03488849 | InnoVital Systems, Inc. | — |
| Unknown | Maxillary Expansion Effects in Children With Upper Airway Obstruction NCT03004300 | Universidade Federal de Goias | N/A |
| Completed | Evaluation of the Use of Tracheal Intubation Through a Laryngeal Tube to Intubate Anesthetized Patients NCT03165461 | Formacion Internacional para la Docencia e Investigación de la Vía Aérea | — |
| Active Not Recruiting | BROnchoalveolar Investigations of Never-smokers With Chronic Obstruction From the Swedish CardioPulmonary bioI NCT03049202 | Karolinska Institutet | — |
| Completed | The Effect of Supraglottic Airway Insertion on the Accuracy of Cricothyroid Membrane Identification in Females NCT03105037 | The Rotunda Hospital | — |
| Completed | TruFreeze Cryotherapy Central Airway Disease NCT02572557 | University Medical Center Groningen | N/A |
| Completed | The Incidence of Difficult Intubation in Obese Versus Non-obese Patients NCT03752593 | King Hamad University Hospital, Bahrain | — |
| Unknown | Ultrasonography Versus Palpation for Identification of the Cricothyroid Membrane NCT02975791 | Rigshospitalet, Denmark | N/A |
| Completed | Mandibular Advancement Bite Block Efficacy Observational Study NCT02964299 | Taipei Veterans General Hospital, Taiwan | — |
| Unknown | Investigation of a Novel Oropharyngeal Airway: The ManMaxAirway NCT03969147 | University of Vermont | N/A |
| Completed | Airway Resistance Measurement in Children 3 to 6 Years of Age NCT02563210 | University Hospital, Brest | N/A |
| Completed | One Minute Heart Rate Variability Quantification in Airway Obstruction Model NCT03733704 | Rambam Health Care Campus | N/A |
| Completed | Pre-Hospital Advanced Airway Management in the Nordic Countries NCT02450071 | Karolinska Institutet | — |
| Completed | A Study of Laryngoscopic Vision With the TotalTrack Device Versus Indirect Laryngoscopy NCT03208140 | Formacion Internacional para la Docencia e Investigación de la Vía Aérea | — |
| Unknown | Study of Interventional Pulmonologic Treatment of Malignant Central Airway Stricture NCT02299830 | Tang-Du Hospital | N/A |
| Completed | Jaw Elevation Device in Deep Sedation Study NCT02403934 | United States Naval Medical Center, San Diego | — |
| Completed | RejuvenAir™ System Lobectomy Safety and Histology Study NCT02106143 | CSA Medical, Inc. | N/A |
| Unknown | Comparison of Laryngeal Mask and I-gel to Laryngoscope by Novice Operators in Simulated Difficult Airway NCT02224027 | Yeungnam University College of Medicine | N/A |
| Completed | The Association Between Pulmonary Function Tests and Difficult Airway NCT02325076 | Tokat Gaziosmanpasa University | N/A |
| Completed | Clinical Features and Airways Inflammation in Never Smokers and Smokers With COPD NCT03274791 | Ministry of Scientific Research, Tunisia | — |
| Withdrawn | TruFreeze™ Airway Obstruction: TAO STUDY NCT01903850 | CSA Medical, Inc. | Phase 4 |
| Completed | Airflow Perturbation Device (APD) for the Evaluation of Pulmonary and Sleep Disorders NCT03054116 | Walter Reed National Military Medical Center | — |
| Completed | Effectiveness of Continuous Negative External Pressure in Preventing Upper Airway Impairment During Routine Co NCT01895062 | 5i Sciences, Inc. | Phase 1 / Phase 2 |
| Completed | Efficacy Study of a Novel Device to Clean the Endotracheal Tube NCT01765530 | Massachusetts General Hospital | N/A |
| Completed | Acetaminophen's Efficacy For Post-operative Pain NCT01721486 | Kaveh Aslani, MD | Phase 4 |
| Completed | Can Recurrence of Hamartomas be Prevented? NCT03604055 | Atatürk Chest Diseases and Chest Surgery Training and Research Hospital | N/A |
| Unknown | Effect of the Salbutamol on Mechanical Properties of Respiratory System NCT01521572 | Rio de Janeiro State University | N/A |
| Completed | Epidemiological Study on the Relationship Between Respiratory Health and Air Pollution From Industrial Sources NCT02490553 | University Hospital, Lille | — |
| Completed | Total Versus Partial Arytenoidectomy in Bilateral Vocal Fold Paralysis NCT01824849 | Hacettepe University | N/A |
| Terminated | Acoustic Reflection Method and Work of Breathing NCT00950443 | Assistance Publique - Hôpitaux de Paris | N/A |
| Completed | Single-dose Crossover Study to Investigate Pharmacodynamics of AZD3199 NCT00736489 | AstraZeneca | Phase 2 |
| Completed | Lung Function and Inflammatory Markers in Cement Dust Exposed Workers: A Cross-shifts Study NCT00727714 | Sykehuset Telemark | — |
| Completed | Heliox in Experimental Upper Airway Obstruction NCT00788788 | University of Witten/Herdecke | Phase 1 / Phase 2 |
| Unknown | Comparison of High Dose and Low Dose Dexamethasone in Preventing Post-Extubation Airway Obstruction in Adults NCT00548483 | Mackay Memorial Hospital | Phase 2 |
| Unknown | Dexamethasone and the Prevention of Post-Extubation Airway Obstruction in Adults NCT00452062 | Mackay Memorial Hospital | Phase 2 |
| Completed | Health Effects of Particulate Acids in Late Adolescence NCT00044317 | National Institute of Environmental Health Sciences (NIEHS) | — |