High-flow Nasal Oxygenation During Preoxygenation and Atelectasis

Atelectasis is when part of your lung collapses and doesn't fill with air properly. This can happen after you get general anesthesia, which is medicine that makes you sleep during surgery. This study wants to see if using high-flow nasal oxygen (a special way to give oxygen through the nose) before surgery helps reduce atelectasis in people who are obese (people with a Body Mass Index or BMI of 30 kg/m² or more).

• Study Length: Only for surgeries lasting more than 2 hours.
• Visits Needed: Must be during surgery under general anesthesia.
• Exclusions: If you have severe heart/lung problems, history of difficult airway, or gastric reflux.

In this study, you'll get oxygen through a tube in your nose before surgery to see if it helps your lungs stay open. If you're having surgery with general anesthesia and meet the criteria, you might qualify. Remember, this study is not for those with certain health issues or short surgeries.