A Trial to Evaluate the Efficacy and Safety of Methoxyethyl Etomidate Hydrochloride in Gastroscopy/Colonoscopy

The initial dose is 0.6 mg/kg, intravenous injection,with an additional 50% starting dose if needed (30second±5second bolus completion). Infusion time was 1minute ± 5second.

The initial dose is 0.8 mg/kg, intravenous injection,with an additional 50% starting dose if needed (30second±5second bolus completion). Infusion time was 1minute ± 5second.

The initial dose is 0.3 mg/kg, intravenous injection,with an additional 50% starting dose if needed (30second±5second bolus completion).Infusion time was 1minute ± 5second.