[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"difficult-mask-ventilation\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:difficult-mask-ventilation":28},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,2,0,[8,55],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":4,"eligibilityCriteria":15,"healthyVolunteers":11,"sex":16,"minAge":17,"maxAge":18,"enrollmentInfo":19,"targetDuration":4,"studyType":22,"phases":4,"briefSummary":23,"conditions":24,"keywords":29,"overallStatus":42,"whyStopped":4,"lastUpdateSubmitDate":43,"lastUpdatePostDateStruct":44,"startDateStruct":47,"completionDateStruct":49,"leadSponsor":51,"locationsCount":54},"100633591","ultrasound-vs-clinical-parameters-for-difficult-airway-prediction-in-obesity-100633591",false,"NCT07528677","Ultrasound vs Clinical Parameters for Difficult Airway Prediction in Obesity","Comparison of Airway Ultrasonography and Conventional Difficult Airway Parameters for Predicting Difficult Airway in Obese Patients: A Prospective Observational Study","Inclusion Criteria:\n\n* Age 18-65 years\n* BMI \\>30 kg\u002Fm2\n* ASA physical status I, II, or III\n* Scheduled for elective surgery requiring orotracheal intubation under general anesthesia\n* Written informed consent obtained\n\nExclusion Criteria:\n\n* Emergency surgery\n* History of previous head and neck surgery or radiotherapy\n* Known or anticipated difficult airway (history of difficult intubation)\n* Presence of cervical spine pathology or limited neck mobility\n* Presence of oropharyngeal or laryngeal pathology\n* Pregnancy\n* Patients with tracheostomy\n* Refusal to participate","ALL","18 Years","65 Years",{"count":20,"type":21},70,"ESTIMATED","OBSERVATIONAL","Obesity is associated with anatomical changes in the upper airway that increase the risk of difficult laryngoscopy and difficult mask ventilation during anesthesia. Conventional airway assessment parameters such as Mallampati score, neck circumference, and STOP-BANG scale are widely used but have limited predictive accuracy in obese patients. Airway ultrasonography has emerged as a promising non-invasive tool for difficult airway prediction; however, ultrasonographic criteria have not yet been standardized.\n\nThis prospective observational study aims to evaluate the utility of airway ultrasonography in predicting difficult airway in adult obese patients (BMI \\>30 kg\u002Fm²) scheduled for elective surgery under general anesthesia. Ultrasonographic measurements will include the distance from skin to hyoid bone (DSHB) at the level of the hyoid bone, the anterior neck soft tissue thickness at the thyrohyoid membrane level, and the hyomental distance ratio (HMDR). These parameters will be compared with conventional airway assessment tools and correlated with intraoperative Cormack-Lehane laryngoscopy grade and Han Scale mask ventilation score to determine their predictive value for difficult airway.",[25,26,27,28],"Obesity (BMI > 35)","Difficult Airway","Difficult Airway Intubation","Difficult Mask Ventilation",[30,31,32,33,34,35,36,37,38,39,40,41],"Airway ultrasonography","Difficult airway prediction","Obese patients","Cormack-Lehane classification","Han Scale","Hyomental distance ratio","Distance from skin to hyoid bone","Neck circumference","Mallampati score","STOP-BANG scale","General anesthesia","Orotracheal intubation","NOT_YET_RECRUITING","2026-04-09",{"date":45,"type":46},"2026-04-14","ACTUAL",{"date":48,"type":21},"2026-04-10",{"date":50,"type":21},"2026-11",{"name":52,"class":53},"Fatih Sultan Mehmet Training and Research Hospital","OTHER",1,{"id":56,"slug":57,"hasResults":11,"nctId":58,"briefTitle":59,"officialTitle":60,"acronym":61,"eligibilityCriteria":62,"healthyVolunteers":63,"sex":16,"minAge":17,"maxAge":64,"enrollmentInfo":65,"targetDuration":4,"studyType":67,"phases":68,"briefSummary":70,"conditions":71,"keywords":73,"overallStatus":78,"whyStopped":4,"lastUpdateSubmitDate":79,"lastUpdatePostDateStruct":80,"startDateStruct":82,"completionDateStruct":84,"leadSponsor":86,"locationsCount":54},"100608643","tulip-airway-in-difficult-mask-ventilation-tadmv-100608643","NCT07204223","Tulip Airway in Difficult Mask Ventilation (TADMV)","Comparison of the Tulip Airway and the Guedel Airway in Anticipated Difficult Mask Ventilation: A Prospective, Randomized, Controlled Crossover Trial","TADMV","Inclusion Criteria:\n\n* Patients aged between 18 and 75 years\n* Patients scheduled for elective surgery under general anesthesia\n* Patients with at least two risk factors for difficult mask ventilation, including:\n* Age over 55 years\n* Presence of beard\n* Edentulism (missing teeth)\n* Obesity (Body Mass Index (BMI) ≥ 30 kg\u002Fm²)\n* History of obstructive sleep apnea syndrome (OSAS) or snoring\n* Neck circumference \\> 43 cm\n* Retrognathia (small jaw structure)\n* Patients classified as American Society of Anesthesiologist (ASA) physical status 1, 2, or 3\n* Patients who provide informed consent\n\nExclusion Criteria:\n\n* Pregnant or breastfeeding women\n* Patients with a history of airway surgery (e.g., tracheostomy, maxillofacial surgery)\n* Patients with severe cardiopulmonary diseases (e.g., advanced Chronic obstructive Pulmonary Disease (COPD), pulmonary hypertension, severe heart failure)\n* Patients with craniofacial anomalies or significant anatomical airway deformities\n* Patients requiring emergency surgery\n* Patients with gastroesophageal reflux disease (GERD) and high risk of aspiration\n* Patients with active upper respiratory tract infection\n* Patients with a history of difficult intubation",true,"75 Years",{"count":66,"type":21},30,"INTERVENTIONAL",[69],"NA","During surgery, right after anesthesia is given, the first step to help the patient breathe is to provide breathing support with a mask. This step is very important because if there is a problem with mask ventilation, the anesthesia team must quickly use other methods to help the patient breathe.\n\nFor some people, mask ventilation can be more difficult. Factors such as older age, having a beard, missing teeth, being overweight, sleep apnea, or certain facial shapes can make this process harder.\n\nTo make mask ventilation easier, special devices placed in the mouth are used. The most common one is called the Guedel airway. In recent years, a new device called the Tulip airway has also been introduced. The shape and features of the Tulip airway are designed to make breathing support easier.\n\nIn this study, we will compare the Tulip airway and the Guedel airway in patients who are expected to have more difficult mask ventilation. Our goal is to find out which device makes it easier and safer to help patients breathe.",[28,72],"Airway Devices",[74,75,76,77],"guedel airway","airway management","difficult bag mask ventilation","tulip airway","RECRUITING","2025-11-16",{"date":81,"type":46},"2025-11-18",{"date":83,"type":46},"2025-10-01",{"date":85,"type":21},"2025-12-31",{"name":87,"class":88},"Ayse Zeynep Turan Civraz","OTHER_GOV"]