Abstract:Objective To explore the effect of remimazolam combined with propofol in painless gastroscopy for school-age children, focusing on its influence on drug supplementation, and evaluate hemodynamic stability, clinical indicators and adverse reactions.Methods One hundred and fifty school-age children undergoing painless gastroscopy at our Hospital (June 2023 to June 2025) were divided into three groups via random number table (50 cases each): propofol group (P), remimazolam group (R), and remimazolam-propofol group (RP). P group used propofol alone for anesthesia induction and maintenance; R group used remimazolam alone; RP group used remimazolam plus propofol. Hemodynamic indicators[heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP) ] were compared at T0 (before induction), T1 (gastroscope insertion), T2 (end of withdrawal), T3 (awakening). Drug dosages (propofol, remimazolam), supplementation frequency, clinical indicators (anesthesia onset time, awakening time, gastroscopy time) and adverse reactions were recorded and compared.Results Comparisons of hemodynamic parameters among Group P, Group R, and Group RP at T0, T1, T2, and T3 showed statistically significant differences in heart rate (HR), systolic blood pressure (SBP), and diastolic blood pressure (DBP) across different time points (P < 0.05), while the main effect between groups and interaction effect were not statistically significant (P > 0.05). The dosage of propofol in Group P was higher than that in Group RP, and the dosage of remimazolam in Group R was higher than that in Group RP (P < 0.05). The number of additional drug administrations in Group RP was lower than that in Group P and Group R (P < 0.05). The onset time of anesthesia in Group RP was longer than that in Group P (P < 0.05) but shorter than that in Group R (P < 0.05); the recovery time in Group RP was shorter than that in both Group P and Group R (P < 0.05); the duration of gastroscopy in Group RP was shorter than that in Group P and Group R (P < 0.05). The incidence of hypotension in Group RP was significantly lower than that in Group R, and the incidence of hiccups in Group P was significantly lower than that in Group R (P < 0.05). The number of children with two or more? adverse reactions in the RP group was significantly lower than that in the P group and the R group (P < 0.05).Conclusion Remimazolam combined with propofol for school-age children’s painless gastroscopy reduces single-drug dosage and supplementation frequency, maintains SBP stability, shortens awakening and gastroscopy time, and lowers adverse reaction incidence (e.g., hypotension). It is safer and more effective than single propofol or remimazolam, and serves as a preferred anesthesia scheme for such children.