Etomidate Combined With Propofol Versus Propofol for Sedation in High-Altitude Patients During Gastroscopy: a Randomized Multicenter Clinical Trial

Patients initially received oxygen via nasal cannula at 5 L/min. All patients underwent routine noninvasive monitoring of blood pressure, ECG, and oxygen saturation. In the EP group, patients received 50 μg fentanyl, followed by a slow intravenous injection of a propofol-etomidate mixture (10 mL:20 mg etomidate + 10 mL:100 mg propofol) at 0.1-0.2 mL/kg. Supplemental doses of 0.05 mL/kg were administered as needed to maintain sedation throughout the procedure.

Patients initially received oxygen via nasal cannula at 5 L/min. All underwent routine noninvasive monitoring of blood pressure, ECG, and oxygen saturation. In the P group, 50 μg fentanyl was administered, followed by a slow intravenous injection of propofol (1-2 mg/kg) after 3 minutes. Supplemental doses of 0.5 mg/kg were administered as needed to maintain sedation throughout the procedure.