2.1. Patient enrollment
Patients enrolled in this study were recruited between March 2022 and March 2023. The inclusion criteria were patients between ≥18 years old who were undergoing bariatric surgery under general anesthesia at The Third People’s Hospital of Chengdu. Patients with American Society of Anesthesiologists physical status 1 to 3, BMI (body mass index) ≥ 27 kg/m