Effective Dose of Remimazolam Combined With Propofol in Painless Gastroscopy

Inclusion Criteria: * ASA grading I to II, with a BMI of 18 to 30 kg/m2 Exclusion Criteria: * Uncontrolled severe hypertension, previous history of abnormal anesthesia, unstable angina and myocardial infarction, abnormal liver and kidney function, acute upper respiratory tract infection, suspected difficulty in the airways, allergies to opioids, milk, eggs, and propofol, long-term use of sedative and analgesic drugs.