Comparison Between Individualized PEEP Ventilation Guided by Driving Pressure and Conventional Lung Protective Strategy in Obese Patients Undergoing Laparoscopic Bariatric Surgery

The lung ultrasound score between 0 and 3 (0 = normal A lines, 1 = multiple separated B lines, 2 = coalescing B lines or light beam, 3 = consolidation). The aeration score will be built by the sum of the scores of the 12 segments, with a minimum of 0 and a maximum of 36 according to the aeration loss.