This research attempts to find the optimum dose of remifentanil that can prevent the unnecessary responses such as coughing, gagging, and movement when LMA is inserted during sevoflurane induction in pediatric patients.
Anaesthesia is induced by inhalation with 3% sevoflurane. A predetermined bolus dose of remifentanil is injected over 30 seconds. The LMA is attempted 60 seconds after bolus administration. The starting dose of remifentanil is 0.5μg/kg and a step size is 0.05μg/kg. If LMA insertion is successful or failed in previous patient, an decrement or increment of 0.05μg/kg remifentanil is injected to next patient, respectively.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
PREVENTION
Masking
SINGLE
Enrollment
50
The starting dose of remifentanil is 0.5μg/kg and a step size is 0.05μg/kg. If LMA insertion is successful or failed in previous patient, an decrement or increment of 0.05μg/kg remifentanil is injected to next patient, respectively.
Department of Anesthesiology and Pain Medicine, Yeungnam University hospital
Nam Gu, Daegu, South Korea
patients's response to the LMA insertion
Fail of LMA insertion is defined as body or limb movement, coughing or gagging with 2 minutes after LMA insertion, no proper jaw relaxation(difficult mouth opening), laryngospasm, bronchospasm, desaturation(SpO2\<94%)
Time frame: 2 minutes after LMA insertion
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