Incidence, characteristics and risk factors for alveolar recruitment maneuver-related hypotension in patients undergoing laparoscopic colorectal cancer resection

Figure 1 Flowchart of the study. Alveolar recruitment maneuver (ARM)-related hypotension means arterial pressure < 60 mmHg during an ARM or within 5 min after an ARM. ARM: Alveolar recruitment maneuver; OLS: Open lung strategy; PEEP: Positive end expiratory pressure; PROVOLON: PROtective Ventilation using Open Lung strategy or Not trial.