Clinical trial

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

Opening soon · Not applicable · 1 countries · Registry ID NCT07642206

Opening soonNot applicableInterventional

What this study is about

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.

A promising-looking record is not the same as confirmed eligibility. The study team must review the full criteria and current recruitment status.

Basic eligibility

Age18 Years to 65 Years

SexAll

Healthy volunteersNot accepted

ConditionAirway Assessment

Full registry criteria

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.

Treatments and study arms

Hyomental distance measured using ultrasound in neutral head position, maximum head extension and during upper lip bite test

Diagnostic 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).

Primary outcomes

Prediction of difficult laryngoscopic view, defined as Cormack-Lehane Grade 3 or 4 on the first laryngoscopy attempt without external laryngeal manipulation.Day of surgery from preoperative assessment to first laryngoscopy attempt after induction of general anethesia and after three minutes of mask ventilation.

Difficult laryngoscopic view is defined as Cormack-Lehane Grade III or IV during the first laryngoscopy attempt without external laryngeal manipulation Cormack-Lehane classification for laryngoscopic view : grade 1: most of the vocal cords is seen; grade 2: only the posterior part of the vocal cords or the arytenoid cartilages are seen; grade 3: only epiglottis is seen; grade 4: epiglottis is not seen.

Study locations

1 locations were listed when this page was built. The first 40 are shown.

Kasr Al-Ainy Hospital, Cairo University🇪🇬 Cairo, Cairo Governorate, Egypt

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Makarious Morris Aboelkheir, MScContact

Email · Call +201225246321

Yasmin Khalid Ahmed, MDContact

Email · Call +201095015566