(A) Sedation reversal and type of procedure. (A) Sedation reversal and type of procedure. Bar graph showing the association between the percentage of sedation reversal events and type of endoscopic procedure. (B) Sedation reversal rate and ASA grade. Bar graph showing the positive association between the percentage of sedation reversal events and patient ASA grade. ASA grade: (1) fit; (2) mild systemic; (3) severe systemic; (4) life-threatening systemic. ASA, American Society of Anesthesiologists; ERCP, endoscopic retrograde cholangiopancreatography; EUS, endoscopic ultrasound. Nekisa Zakeri et al. Frontline Gastroenterol 2015;6:270-277 Copyright © BMJ Publishing Group Ltd & British Society of Gastroenterology. All rights reserved.