الفهرس 
acknowledgmentOnly 14 pages are availabe for public view
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Abstract
The current study was conducted at Al-Rajhi Hospital, Assiut University Hospitals from January 2021 till January 2022. and included 150 patient (20-50 years, ASA II), scheduled for elective endoscopic retrograde cholangiopancreatography (ERCP) under conscious sedation. Patients were allocated into one group. Patients received sedation via propofol (2 mg/kg) and fentanyl (1 ug/kg) and 4 liters O2 flow through nasal cannula and EtCO2 was monitored through the DualGuard which incorporates an endoscopy bite block with oxygen delivery and CO2 monitoring from both the mouth and nose simultaneously. An ABG sample was withdrawn from each patient through an arterial canula after induction of sedation (baseline), and at the end of the procedure RESULTSThere was no statistically significant difference (P <0.05) regarding the age, weight, and the duration of the procedure between after induction and at the end of procedure Intraoperatively, there was no statistically significant differences regarding SBP, DBP and MBP between readings after induction and at the end of the procedure (P <0.05). HR after induction was significantly (P <0.001) lower than at the end.