Inclusion and exclusion
hypoxemia, hypersensitivity, hypotension
ADVERSE EVENTS, LIVER DISEASES, HYPERSENSITIVITY, UNCONTROLLED HYPERTENSION
Adult patients of American Society of Anesthesiologists (ASA) physical status I through III aged between 65 and 79 years of either sex scheduled for ERCP under sedation were included in this study. Exclusion criteria were severe cardiac, lung, renal, neurological, or liver diseases, hypotension (systolic blood pressure < 90mmHg) or uncontrolled hypertension (systolic blood pressure > 170mmHg, diastolic blood pressure > 100mmHg), pre-existing hypoxemia (SpO2 < 90%), known hypersensitivity to any of the drugs that would be used in the study, and a history of adverse events with prior sedation. Additionally, patients who had taken any sedative drug within the previous 24 h and those who refused participation were excluded.