ABSTRACT
AIM: To explore the optimal dosage of dexmedetomidine for prevention of agitation induced by sevoflurane anesthesia in children. METHODS: One hundred and sixty ASA -Ⅱ pediatric patients, who underwent indirect inguinal hernia or hydrocele were randomly divided into 4 groups: C group (saline group), D0.2 group (dexmedetomidine 0.2 μg/kg), Group D0.4 (dexmedetomidine 0.4 μg/kg); D0.6 group (dexmedetomidine 0.6 μg/kg), 40 cases in each group. The dexmedetomidine was treated with intravenous infusion of the same volume of saline at 10 min before the induction of anesthesia. Observation with induction period and intraoperative hemodynamic situation, postoperative FLACC behavior score, Ramsay sedation scores, extubation time, adverse reactions, such as respiration depression (SpO20.05). The case of postoperative agitation in the group D0.4 (12 cases), D0.6 (8 cases) lower than the group C (23 cases) and D0.2 (16 cases) (P0.05).CONCLUSION:The usage of 0.4 μg/kg dexmedetomidine for the pediatric inguinal hernia or hydrocele surgery under the anesthesia of sevoflurane has the characteristics of stable hemodynamics during the operation, reducing the incidence of restlessness after sevoflurane anesthesia, not affecting the recovery of children, and not increasing adverse reactions.