EIT-guided PEEP Titration Versus Standard Ventilation in Bariatric Surgery

This study is a prospective, single-center, single-blind, randomized controlled clinical trial. Patients scheduled for laparoscopic bariatric surgery will be selected and randomly assigned to either the EIT-guided individualized PEEP group (Group P-eit) or the control group (Group P-8). Group P will be ventilated using the PEEP value determined by EIT, while Group C will be ventilated with a fixed PEEP value of 8 cmH2O.The primary outcome is the incidence of postoperative pulmonary complications (PPCs) within 72 hours after surgery.

This is a single-center, single-blind，randomized controlled trial conducted at the First Affiliated Hospital of Shandong First Medical University in Jinan City,Shandong Province, China. This randomized controlled trial has been approved by the Ethics Committee of The First Affiliated Hospital of Shandong First Medical University (YXLL-KY-2025(107)).And it complies with the Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) guidelines. A total of 118 participants will be randomly allocated to the EIT-guided individualized PEEP group (Group P ) (n = 59) or the control group (Group C) (n = 59). Recruitment for this study has begun on July 28, 2025, and will continue through the end of 2026.