Tests head positions for face mask breathing in people with obesity during surgery anesthesia
Compares head positions for face mask breathing support in adults with class 3 obesity.
Plain-language title generated from the registry record
Registry title: Effectiveness of Two Different Body Positions During Facemask Ventilation in Obese Patients
Key facts
- Where
- Toronto, CanadaSee the site
Where in Canada
- Mount Sinai HospitalToronto, CanadaTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Mount Sinai Hospital, Canada
- Trial code
- NCT06305273
- Record updated
- 17 June 2026
- Original description
It is important to provide enough oxygen to the patients who are asleep during surgery. One way to do this is by using a mask placed over the face to help them breathe. When it becomes difficult getting enough oxygen into the patient's body using the mask, it's called difficult mask ventilation. There can be different reasons for this, and having a higher BMI is one of them. Body physique is assessed by Body Mass Index (BMI). This calculation gives an indication of a person's weight relative to their height.Read full original descriptionShow less
Effectiveness of Two Different Body Positions During Facemask Ventilation in Class 3 Obesity Patients: a Randomized Crossover Trial
It is important to provide enough oxygen to the patients who are asleep during surgery. One way to do this is by using a mask placed over the face to help them breathe. When it becomes difficult getting enough oxygen into the patient's body using the mask, it's called difficult mask ventilation. There can be different reasons for this, and having a higher BMI is one of them. Body physique is assessed by Body Mass Index (BMI). This calculation gives an indication of a person's weight relative to their height.
There is some evidence in the research literature to suggest that when the patient is positioned in a way that helps their airway, like using a device to lift their head and torso 25 degrees , it might help the process of getting enough oxygen work better. The study aims to determine if patients with high BMI can breathe better using a face mask while they are in a head elevated position compared to lying flat on their back.
Inclusion: BMI > 40 kg/m2; age > 18 years; scheduled for elective surgery under general anesthesia; have the ability to comprehend the rationale for the study and provide consent.
Exclusion: upper airway disease or airway anatomical abnormalities; presence of major cardiovascular, respiratory, or cerebral vascular disease; pregnancy,; risk of aspiration of gastric content; patients using glucagon-like peptide(GLP)-1 agonists; emergency cases; if the provider anesthesiologist indicates an awake technique to secure the airway.