| Not Yet Recruiting | Ultrasound in Predicting Difficult Intubation in Acromegaly Patients NCT07306325 | Başakşehir Çam & Sakura City Hospital | — |
| Recruiting | Difficult Airway Incidence in Cardiovascular Surgery and a Prediction Model Development NCT06986187 | Diskapi Teaching and Research Hospital | — |
| Completed | Ultrasound-Based Airway Assessment for Predicting Difficult Intubation in Adult Female Patients NCT07343557 | Adana City Training and Research Hospital | — |
| Completed | THE ROLE OF ARTIFICIAL INTELLIGENCE TRAINED WITH PRE-MEASURED NUMERICAL DATA IN PREDICTION OF DIFFICULT INTUBA NCT06961240 | Kutahya Health Sciences University | — |
| Completed | Relationship of Isthmus Thickness With Difficult Laryngoscopy and Difficult Intubation in Patients Receiving H NCT06896513 | Konya City Hospital | — |
| Recruiting | Video Classification of Intubation in Spain (VCI) (Pediatrics) NCT06881576 | Clinica Universidad de Navarra, Universidad de Navarra | — |
| Recruiting | Video Classification of Intubation in Spain (VCI) NCT06537531 | Clinica Universidad de Navarra, Universidad de Navarra | — |
| Unknown | Airway Ultrasound Versus Mallampati Score as a Predictor of Difficult Direct Laryngoscopy in Obese Patients NCT06057818 | Ain Shams University | — |
| Recruiting | STOP-Bang Questionnaire: A Predictor of Obstructive Sleep Apnea and Difficult Mask/Intubation? NCT06247631 | Atatürk Chest Diseases and Chest Surgery Training and Research Hospital | — |
| Completed | Ultrasound Predictors of Difficult Airway in Adults NCT07383610 | Kutahya Health Sciences University | — |
| Completed | Comparison of El-Ganzouri Risk Index and Airway Ultrasonographic Evaluation in Thyroid Surgery NCT06369636 | Ankara City Hospital Bilkent | — |
| Unknown | Modification of the Stylet Shape of the Glidescope for Facilitating Difficult Intubation NCT05744388 | Ain Shams University | N/A |
| Unknown | Effect of Standard Laryngoscopy Versus Video-laryngoscopy NCT05902858 | Azienda Ospedaliera SS. Antonio e Biagio e Cesare Arrigo di Alessandria | N/A |
| Unknown | Air Q Laryngeal Airway Versus the AmbuAura Gain as a Conduit for Endotracheal Intubation NCT05607433 | Cairo University | N/A |
| Completed | Tube 1st Technique for Easy Fiberoptic Intubation NCT05399147 | Ain Shams University | N/A |
| Completed | Is HugeMed Video Laryngoscope Superior to McGrath in Pediatric Patients NCT06484517 | Marmara University | N/A |
| Unknown | Effectiveness of C-MAC Video-stylet Versus C-MAC D- Blade Video-laryngoscope for Tracheal Intubation NCT04759300 | Alexandria University | N/A |
| Unknown | Mallampati Score for Prediction and Prognosis of Postoperative Mortality and Morbidity and Safety Profiles of NCT06005701 | Qassim University | — |
| Completed | Laryngeal Mask, Video Laryngoscopy NCT04311775 | Kocaeli Derince Education and Research Hospital | — |
| Unknown | Agreement Between Video and In-person Airway Assessment Performed by Anaesthetists in Patients Scheduled for E NCT04783584 | Michael Ma | — |
| Unknown | Effectiveness of C-MAC Video-stylet Versus Fiberoptic Bronchoscope for Awake Intubation NCT04759287 | rehab zayed | N/A |
| Completed | Evaluation of Difficult Airway With Ultrasonography NCT04289597 | Eskisehir Osmangazi University | — |
| Completed | Pediatric Difficult Airway Prediction Using Ultrasonography NCT04361929 | Cairo University | — |
| Unknown | Thyromental Height Test as a Predictor of Difficult Airway: NCT04264338 | Cairo University | — |
| Unknown | 'Single Hand Used inTubaTing Laryngoscope Evaluation' Study NCT04310384 | University of the Basque Country (UPV/EHU) | N/A |
| Unknown | Lingual Nerve Injury in Patients With Difficult Intubation NCT04195152 | Istanbul Medeniyet University | — |
| Completed | Comparison of Video Laryngoscope Using Miller or Macintosh Approach During Endotracheal Intubation NCT05545982 | Kaohsiung Veterans General Hospital. | N/A |
| Unknown | Safety and Efficacy of Cleverscope. A New Medical Device for Tracheal Intubation NCT03902704 | Hospital General Universitario de Valencia | N/A |
| Unknown | Risk Prediction of Difficult Tracheal Intubation in OSAHS Patient NCT04506346 | Beijing Tsinghua Chang Gung Hospital | — |
| Completed | A Comparison Between the Intubating Laryngeal Tube Suction and the Ambu AuraGain NCT05347680 | Bnai Zion Medical Center | N/A |
| Completed | Indirect Laryngoscopy and Ultrasonography in Prediction of Difficult Airway NCT04226703 | Istanbul University | — |
| Completed | Ultrasonography vs Conventional Methods for Prediction of Difficult Airway in Adult Patients NCT03799055 | Benha University | — |
| Completed | Ultrasound Parameters to Predict Difficult Airway NCT04168840 | Clinica Universidad de Navarra, Universidad de Navarra | — |
| Unknown | Double Lumen Tube Positioning With Bonfils Fiberoptic Stylet: Prospective Observational Study in 30 Adult Pati NCT03982745 | Università Politecnica delle Marche | — |
| Unknown | Ultrasound to Predict Difficult Airway NCT03789071 | Augusta University | — |
| Completed | Orotracheal Intubation in Adult Patients: A Comparison of Standard Airtraq , Nasotracheal Airtraq Combined Wit NCT03709524 | Kocaeli University | N/A |
| Completed | A Comparison of McGrath MAC Versus C-MAC Videolaryngoscopes in Morbidly Obese Patients NCT03657927 | Inonu University | N/A |
| Completed | Evaluation of the Efficacy of Ambu® aScope for Intubation in Cancer Tongue NCT03999476 | mahmoud salem soliman | N/A |
| Completed | A Comparison of a Macintosh Laryngoscope and Endotracheal Tube Introducer in a Manikin NCT03419507 | Derince Training and Research Hospital | N/A |
| Completed | Evaluation of Complications in Airway Management NCT03550326 | Derince Training and Research Hospital | — |
| Completed | Macintosh Laryngoscope Assisted Fiberoptic Intubation NCT03310866 | Mansoura University | N/A |
| Completed | Evaluation of Intubation Rescue Techniques on Management of Difficult Airway NCT03545620 | Derince Training and Research Hospital | — |
| Completed | Evaluation of Video Laryngoscopy in Patients With Head and Neck Pathology NCT03265938 | Icahn School of Medicine at Mount Sinai | — |
| Completed | Visualization of the Intubation Pathway With the "IRRIS"-Device NCT03234283 | University of Zurich | N/A |
| Completed | Study Assessing the Position of Cricothyroid Membrane in Relation to Movement of Neck From Neutral to Extended NCT03178318 | Northampton General Hospital NHS Trust | N/A |
| Completed | The Effect of Semi-recumbent Position With Exercise Training on Long-term Ventilator-dependent Patients NCT04822831 | Taoyuan General Hospital | 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 | — |
| Completed | Two Neck Ultrasound Measurements as Predictors of Difficult Laryngoscopy NCT03547193 | Università Politecnica delle Marche | — |
| Completed | Airway Ultrasonography Measurements With Cormack Lehane Classification in Patients With OSA NCT03899519 | Universiti Sains Malaysia | — |
| Terminated | Voice Analysis as a Predictor for Difficult Intubations NCT04105738 | J. Matthias Walz | — |
| Completed | Comparing the Efficiency of Three Third-generation Supraglottic Airways as an Intubation Route NCT02975466 | Université de Sherbrooke | N/A |
| Completed | The Evaluation of Simplified Predictive Intubation Difficulty Score. NCT03320278 | Maltepe University | — |
| Completed | A Predictive Model for Difficult Intubation NCT02944305 | Khon Kaen University | — |
| Completed | Comparison of Intubation Conditions of the Articulating Stylet and Intubating Stylet Guided Videolaryngoscopy NCT02805569 | Diskapi Teaching and Research Hospital | N/A |
| Completed | Difficult Intubation and Anthropometric Measurement NCT02814266 | Trakya University | N/A |
| Completed | Intubation on a Paediatric Manikin by Emergency Staff: a Comparison of Airtraq and Glidescope NCT02478203 | Kocaeli University | N/A |
| Completed | STOP-BANG and Cephalometry in Prediction of Difficult Airway in Patients at Risk of OSA NCT03105388 | Universiti Sains Malaysia | — |
| 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 | — |
| Completed | Preoperative Evaluation of Airway NCT03597880 | Yeditepe University Hospital | N/A |
| Completed | Comparison of Endotracheal Intubation Over the Aintree Via the I-gel and Laryngeal Mask Airway Supreme NCT02476565 | Vanderbilt University | N/A |
| Completed | Predicting Difficult Airway in Children NCT03641157 | Tepecik Training and Research Hospital | — |
| Unknown | A Comparison of the Flex-it® to the GlideRite® Stylet for GlideScope® in Simulated Difficult Intubations. NCT02177240 | Maisonneuve-Rosemont Hospital | N/A |
| Completed | Evaluation of Videolaryngoscopes in Difficult Airway (SWIVITII) NCT02088801 | Insel Gruppe AG, University Hospital Bern | N/A |
| Terminated | Superior Laryngeal Nerve Block For Awake Endotracheal Intubation Study NCT01848548 | Wake Forest University Health Sciences | — |
| Terminated | King Vision Video Laryngoscope Versus Glidescope Video Laryngoscope NCT02324465 | Vanderbilt University | N/A |
| Recruiting | Facial Analysis to Classify Difficult Intubation NCT01612949 | Wake Forest University Health Sciences | — |
| Completed | Macintosh and D-Blade® in Simulated Difficult Airway NCT03403946 | Johann Wolfgang Goethe University Hospital | N/A |
| Completed | Risk Factors of Difficult Intubation and Related Complications in Adults in Intensive Care Units: FRIDA-Rea NCT01532063 | University Hospital, Montpellier | N/A |
| Unknown | Difficult Intubation With Glidescope Video Laryngoscope NCT01789034 | Fondazione I.R.C.C.S. Istituto Neurologico Carlo Besta | — |
| Terminated | CMAC® Versus Airtraq® and Macintosh Laryngoscope in Difficult Tracheal Intubation. NCT01031940 | University College Hospital Galway | N/A |
| Completed | Difficult Bag Mask Ventilation and Difficult Intubation in Children NCT02823392 | Prince of Songkla University | — |