Combined Ultrasound and Upper Lip Bite Test Assessment of Difficult Laryngoscopy in Obese Patients (NCT07642206) | Clinical Trial Compass
Not Yet RecruitingNot Applicable
Combined Ultrasound and Upper Lip Bite Test Assessment of Difficult Laryngoscopy in Obese Patients
Egypt134 participantsStarted 2026-07-01
Plain-language summary
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:
* Correlation of HMDR-ULBT values with Cormack-Lehane grades during laryngoscopy.
* Comparison of HMDR-ULBT with standard HMDR in predicting difficult laryngoscopy.
Who can participate
Age range
18 Years – 65 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Adult obese patients aged 18 to 65 years.
* Both sexes.
* American Society of Anesthesiologists (ASA) physical status II- III.
* Body Mass Index (BMI) ≥ 30 kg/m² (classified as obese).
* Scheduled for elective surgical procedures requiring general anesthesia with endotracheal intubation.
* Ability to understand and provide informed written consent.
* Cooperative and able to perform the ULBT on command.
* Normal dentition (presence of upper and lower incisors to perform ULBT accurately).
Exclusion Criteria:
* History of maxillofacial trauma, surgery, or congenital facial anomalies affecting mandibular movement or neck anatomy.
* Known or suspected difficult airway requiring awake intubation.
* Patients with limited neck mobility (e.g., cervical spine disease or immobilization).
* Temporomandibular joint disorders or restricted mandibular mobility.
* Pregnancy.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Prediction of difficult laryngoscopic view, defined as Cormack-Lehane Grade 3 or 4 on the first laryngoscopy attempt without external laryngeal manipulation.
Timeframe: Day of surgery from preoperative assessment to first laryngoscopy attempt after induction of general anethesia and after three minutes of mask ventilation.