Combined Ultrasound and Upper Lip Bite Test Assessment of Difficult Laryngoscopy in Obese Patients

Starting soon · Not applicable

Conditions studied: Airway Assessment

In brief

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.

Key facts

Study ID

NCT07642206

Run by

Cairo University

People needed

134

Starts

2026-07-01

Expected to finish

2027-03-01

Last updated by the study team

2026-06-12

Who can join

Age: 18 and older, up to 65. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• 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).

You may not qualify if…

• 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.

Where it is running

• Kasr Al-Ainy Hospital, Cairo University — Cairo, Cairo Governorate, Egypt

Full record on ClinicalTrials.gov

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