Abstract:Objective To explore the efficacy and safety of Remimazolam tosylate combined with low-dose Propofol in painless gastroscopy.Methods 150 patients scheduled for painless gastroscopy, were randomly divided into 3 groups (n = 50): Remimazolam group (group R), Propofol group (group B), and the Remimazolam combined with Propofol group (Group RB). Group R was given 0.20 mg/kg of Remimazolam tosylate intravenously, group B was given 2.00 mg/kg of Propofol intravenously, and group RB was given 0.15 mg/kg of Remimazolam tosylate and 0.50 mg/kg of Propofol intravenously. All group injected slowly at 30 ~ 40 s and use Fentanyl 1 μg/kg for intravenous analgesia. Gastroscopy was performed by the same physician when the eyelash reflex disappeared. The success rate of sedation, body movement and the perioperative adverse events were recorded, and the induction time, emergence time and discharge time were compared.Results The success rate of sedation was 100.0% in all the three groups. The incidence of intraoperative body movement in group RB (8.0%) was lower than that in group R (28.0%), and there was no difference between group RB and group B (4.0%). The rates of hypotension, bradycardia and hypoxemia in group RB were lower than that in group B, and did not differ from that in group R. The rate of injection pain in group RB was lower than that in group B, and there was no difference between group RB and group R. There was no significant difference in the incidence of postoperative nausea, vomiting and dizziness among the three groups. The induction time of group RB was shorter than that of group R (P < 0.05) and slightly longer than that of group B (P < 0.05). There was no difference in emergence time and discharge time among the three groups.Conclusion The safety and efficacy of Remimazolam tosylate combined with low-dose Propofol is better than that of both alone and it has important clinical value in the painless gastroscopy.