NCT07887503Not yet recruiting
Prediction of Difficult Mask Ventilation in Obese Population Undergoing Emergency Surgery
Preoperative Prediction of Difficult Mask Ventilation in Obese Population Undergoing Emergency Surgery Using Ultrasound Skin to Hyoid Bone Distance. An Observational, Multicenter, Prospective Study.
Source: ClinicalTrials.gov · Last updated 21 Oct 2026
Brief summary (registry, in English)
The current study is an observational, prospective study. It will be conducted in the emergency operative theatre, Alfayoum University, Alfayoum, Egypt. Identification of difficult mask ventilation among obese population is crucial specially in emergency settings with high risk of aspiration pneumonia or hypoxemia. No clinical predicrors were identified up till now. While the patient lies supine with the head in neutral position, Ultrasound guided (high frequency- depth adjusted at 3-4 cm) will be placed in the in submental region to measure the distance between skin to hyoid bone . Hyoid bone will be identified as a hyperechoic shadow below the mentum. Three measures will be taken and the average will be calculated. All candidates will sign informed consent pre-scanning and retain their right to withdraw at any time without compromising their medical care. Exclusion criteria will include elective operations, patient refual, previous neck surgery, prescence of surgical emphysema, emergency cesarean section and submental abcess.
- Status (registry)
- Not yet recruiting
- Study type
- Observational
- Enrollment
- 550 (estimated)
- First submitted
- 9 Oct 2026
- Start date
- 15 Oct 2026
- Primary completion date
- 1 Dec 2027
- Lead sponsor
- Minia University
- Diseases
- Obesity
- NCT number
- NCT07887503
What you commit to
- Study type: Observational
- Planned participants: 550
- From 15 Oct 2026 to the primary completion date, 1 Dec 2027
- No sites listed in no country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Previous anterior neck surgery or radiotherapy with scarring precluding good acoustic window.
- Submental trauma, abcess or surgical emphysema.
- Severe hypoxemia requiring immediate assisted ventilation.
- Patients already receiving bag-mask ventilation, or invasive ventilation before the ultrasound assessment.
- \-
Other
- Elective procedures
- Patient refusal
- Planned awake fibrooptic intubation
- Planned regional anesthesia
- Inability to obtain a technically adequate ultrasound image after standardized attempts.
- Emergency C.S
Who the study is looking for
- Adults aged ≥18 years. Body mass index (BMI) ≥30 kg/m², measured before induction. Patients scheduled for emergency surgical procedures under general anesthesia with planned tracheal intubation.
- Emergency surgery defined as surgery requiring operative intervention within 24 hours of the decision to operate because postponement may adversely affect the patient.
- . Availability of sufficient pre-induction time to perform the standardized ultrasound assessment without delaying clinically indicated surgery.
- Written informed consent obtained from the patient or, where applicable under the approved emergency research procedure, from an authorized representative
Age in the registry: 18 years to 80 years · Sex: All · Does not accept healthy volunteers
This page is information, not medical advice. Discuss any trial with your doctor.