[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100642754":3},{"organization":4,"armGroups":7,"interventions":13,"overallOfficials":18,"centralContacts":19,"locations":29,"responsibleParty":45,"collaborators":18,"id":49,"slug":18,"hasResults":50,"nctId":51,"briefTitle":52,"officialTitle":53,"acronym":18,"eligibilityCriteria":54,"healthyVolunteers":50,"sex":55,"minAge":56,"maxAge":57,"enrollmentInfo":58,"targetDuration":18,"studyType":61,"phases":62,"briefSummary":64,"conditions":65,"keywords":67,"overallStatus":70,"whyStopped":18,"lastUpdateSubmitDate":71,"lastUpdatePostDateStruct":72,"startDateStruct":75,"completionDateStruct":77,"leadSponsor":79,"locationsCount":80},{"fullName":5,"class":6},"Cairo University","OTHER",[8],{"label":9,"type":6,"description":10,"interventionNames":11},"HMD measured by US in neutral head position , maximum head extension and during upper lip bite test","Hyomental distance will be measured using ultrasound in three positions: neutral head position, maximum head extension, and during the upper lip bite test (ULBT).",[12],"Diagnostic Test: Hyomental distance measured using ultrasound in neutral head position, maximum head extension and during upper lip bite test",[14],{"type":15,"name":16,"description":10,"armGroupLabels":17,"otherNames":18},"DIAGNOSTIC_TEST","Hyomental distance measured using ultrasound in neutral head position, maximum head extension and during upper lip bite test",[9],null,[20,25],{"name":21,"role":22,"phone":23,"phoneExt":18,"email":24},"Makarious Morris Aboelkheir, MSc","CONTACT","+201225246321","makariousmorris0@gmail.com",{"name":26,"role":22,"phone":27,"phoneExt":18,"email":28},"Yasmin Khaled Ahmed, MD","+201095015566","dr_ykh@hotmail.com",[30],{"facility":31,"status":18,"city":32,"state":33,"zip":18,"country":34,"cosmosGeoPoint":35,"geoPoint":40,"contacts":41},"Kasr Al-Ainy Hospital, Cairo University","Cairo","Cairo Governorate","Egypt",{"type":36,"coordinates":37},"Point",[38,39],31.24967,30.06263,{"lat":39,"lon":38},[42,43],{"name":21,"role":22,"phone":23,"phoneExt":18,"email":24},{"name":44,"role":22,"phone":27,"phoneExt":18,"email":28},"Yasmin Khalid Ahmed, MD",{"type":46,"investigatorFullName":47,"investigatorTitle":48,"investigatorAffiliation":5,"oldNameTitle":18,"oldOrganization":18},"PRINCIPAL_INVESTIGATOR","Makarious Morris Aboelkheir Shenouda","Assistant Lecturer of Anesthesiology","100642754",false,"NCT07642206","Combined Ultrasound and Upper Lip Bite Test Assessment of Difficult Laryngoscopy in Obese Patients","Ultrasound-Measured Hyomental Distance Ratio Combined With the Upper Lip Bite Test as a Predictor of Difficult Laryngoscopy in Obese Patients: A Prospective Observational Study","Inclusion Criteria:\n\n* Adult obese patients aged 18 to 65 years.\n* Both sexes.\n* American Society of Anesthesiologists (ASA) physical status II- III.\n* Body Mass Index (BMI) ≥ 30 kg\u002Fm² (classified as obese).\n* Scheduled for elective surgical procedures requiring general anesthesia with endotracheal intubation.\n* Ability to understand and provide informed written consent.\n* Cooperative and able to perform the ULBT on command.\n* Normal dentition (presence of upper and lower incisors to perform ULBT accurately).\n\nExclusion Criteria:\n\n* History of maxillofacial trauma, surgery, or congenital facial anomalies affecting mandibular movement or neck anatomy.\n* Known or suspected difficult airway requiring awake intubation.\n* Patients with limited neck mobility (e.g., cervical spine disease or immobilization).\n* Temporomandibular joint disorders or restricted mandibular mobility.\n* Pregnancy.","ALL","18 Years","65 Years",{"count":59,"type":60},134,"ESTIMATED","INTERVENTIONAL",[63],"NA","The aim of this observational study is to evaluate the accuracy of the HMDR combined with the ULBT as a predictor of difficult laryngoscopy in obese patients undergoing elective surgery under general anesthesia, regarding:\n\n* Correlation of HMDR-ULBT values with Cormack-Lehane grades during laryngoscopy.\n* Comparison of HMDR-ULBT with standard HMDR in predicting difficult laryngoscopy.",[66],"Airway Assessment",[68,69],"airway ultrasound","upper lip bite test","NOT_YET_RECRUITING","2026-06-10",{"date":73,"type":74},"2026-06-12","ACTUAL",{"date":76,"type":60},"2026-07-01",{"date":78,"type":60},"2027-03-01",{"name":5,"class":6},1]