1 Department of Anesthesiology, The Ohio State University Wexner Medical Center, Columbus, Ohio, sergio.bergese@osumc.edu Respiratory and Monitoring Solutions, Medtronic, Boulder, Colorado Department of Surgery, University of Colorado Hospital, Aurora, Colorado Department of Anesthesiology, The Ohio State University Wexner Medical Center, Columbus, Ohio Respiratory and Monitoring Solutions, Medtronic, Boulder, Colorado Respiratory and Monitoring Solutions, Medtronic, Edinburgh, United Kingdom.