Fig. 3From: Protective intraoperative ventilation with higher versus lower levels of positive end-expiratory pressure in obese patients (PROBESE): study protocol for a randomized controlled trialSchedule of enrollment, interventions, and assessments. POD Postoperative day, PEEP Positive end-expiratory airway pressure, RM Recruitment maneuver, SpO 2 Peripheral oxyhemoglobin saturation measured by pulse oximetryBack to article page