Conditions: Delirium on Emergence
Keywords: sevoflurane emergence delirium preschool
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 109
Healthy volunteers: no

Brief summary:
The purpose of this study is to determine whether the incidence of emergence delirium will be reduced when end-tidal concentration of sevoflurane decreases.

Detailed description:
Sevoflurane induction and maintenance were selected. Intubation was performed after lidocaine spray on vocal cord. After that, an effective caudal or brachial plexus block was performed. End-tidal concentration of sevoflurane was maintained at 2.5%. Spontaneous respiratory was maintained. Sevoflurane was stopped after the end of surgery. Patients were randomly assigned to 2 groups: high concentration group (Group HC, end-tidal concentration of sevoflurane when extubating \>=0.5%) and low concentration group (Group LC, end-tidal concentration of sevoflurane when extubating \<0.5%). Patients in Group LC were extubated when they coughed or purposeful movement appeared. The patients whose end-tidal concentration of sevoflurane \>= 0.5% were excluded. Patients in Group HC were extubated when any of the criteria was met: 1.the patient coughed or purposeful movement appeared 2.end-tidal concentration of sevoflurane decreased to 0.5%. A trained nurse (blind to groups) recorded PAEDs scores in PACU.

Arms:
arm 1: low concentration group arm 2: high concentration group

Interventions: intervention 1: sevoflurane intervention 2: Sevoflurane
Intervention descriptions: intervention 1: extubation when end-tidal concentration of sevoflurane \< 0.5% intervention 2: extubation when end-tidal concentration of sevoflurane \>= 0.5%

Protocol document: