Randomized Controlled Study for Analyzing Clinical Benefit of Pain Focused Sedation With Combination of Fentanyl and Propofol During Endoscopic Retrograde Cholangiopancreatography (ERCP)

"Propofol Meperidine : 25 mg IV just before procedure~* IV bolus of 1 mg/kg for sedation induction,~* Infusion of 60 mcg/min/kg for maintenance of sedation~* Additional bolus dose of 10mg as needed for adequate sedation"

"Fentanyl~* IV bolus of 1 µg/kg for sedation induction~* Additional bolus dose of 0.5 µg/kg as needed for adequate pain control Propofol~* IV bolus of 0.4 mg/kg for sedation induction~* Infusion of 30 µg/min/kg for maintenance of sedation~* Additional bolus dose of 10mg as needed for adequate depth of sedation"