Abstract
Objective To evaluate the effects of the sciatic nerve block on emergence agitation following sevoflurane-based anesthesia in pediatric patients undergoing foot orthomorphia.Methods Sixty pediatric patients,aged 3-7 yr,weighing 12-20 kg,of ASA physical status Ⅰ or Ⅱ,scheduled for elective foot orthomorphia,were randomly assigned to one of two groups (n =30 each):control group (group Ⅰ) and sciatic nerve block group (group Ⅱ).After induction of anesthesia,laryngeal mask airway was inserted,and artificial or mechanical ventilation was performed.Anesthesia was maintained with inhalation of sevoflurane (end-tidal concentration 0.5%-2.0%) and iv fentanyl 0.5-2.0 μg/kg.The sciatic nerve block on the affected side was performed under the guidance of a nerve stimulator,and 0.25% bupivacaine 0.5 ml/kg was injected.Laryngeal mask airway removal time and emergence time were recorded.At 30 min of recovery from anesthesia,agitation was scored and the development of emergence agitation was recorded.Pain was evaluated with Faces Pain Scale-Revised (FPS-R) at 10 and 30 min of recovery from anesthesia.Adverse reactions including hypoxemia and nausea and vomiting were also recorded during recovery from anesthesia.Results Compared with group Ⅰ,the intraoperative consumption of fen tanyl and mean end-tidal concentration of sevoflurane were significantly decreased,laryngeal mask airway removal time and emergence time were shortened,and the incidence of emergence agitation,PPS-P scores and incidence of hypoxemia were decreased in group Ⅱ.Conclusion The sciatic nerve block is helpful in decreasing the development of emergence agitation following sevoflurane-based anesthesia in pediatric patients undergoing foot orthomorphia. Key words: Nerve block ; Sciatic nerve ; Anesthetics, inhalation ; Anesthesia recovery period; Children; Agitation
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