Effect of Single-dose Dexmedetomidine on Airway Reflex in Adult With Oral Intubation After Thyroidectomy
Coughing during emergence from general anaesthesia may lead to dangerous effects including laryngospasm, detrimental haemodynamic changes. Post-thyroidectomy bleeding occurs in 1-4% of patients, and severe coughing may cause bleeding. Dexmedetomidine, a potent α adrenoreceptor agonist, is theoretically appropriate for reducing airway and haemodynamic reflexes during emergence from anaesthesia.
In this study, we investigated whether intravenous single-dose dexmedetomidine at the end of surgery reduces coughing during extubation after thyroidectomy.
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
|Official Title:||Effect of Single-dose Dexmedetomidine on Airway Reflex in Adult With Oral Intubation After Thyroidectomy|
- Coughing Grade [ Time Frame: from the time of eye opening to 5 min after extubation ] [ Designated as safety issue: No ]The coughing incidence and severity will be measured at extubation. Especially from the time of eye opening to 5 min after extubation. The coughing grade was assessed by the following cough grading system: Grade 0, no cough or single, mild cough at extubation; Grade 1, multiple, not sustained cough with mild severity; Grade 2, cough persistence less than 5 s with moderate severity; Grade 3, severe, persistent cough for more than 5 s (bucking).
- Emergence Time [ Time Frame: from sevoflurane discontinuation, up to the time of eye opening (estimated time : from 5 min to 10 min) ] [ Designated as safety issue: No ]The emergence time will be recorded as the time from sevoflurane discontinuation to eye opening on command.
|Study Start Date:||December 2012|
|Study Completion Date:||June 2013|
|Primary Completion Date:||January 2013 (Final data collection date for primary outcome measure)|
We administrate the dexmedetomidine single bolus (0.5ug/kg, intravenously, for 10 min) at time of muscle layer closing.
We administrate the dexmedetomidine single bolus (0.5ug/kg, intravenously) at time of muscle layer closing.
Other Name: Precedex
Placebo Comparator: saline
We administrate the saline single bolus (0.25ml/kg,intravenously, for 10 min) at time of muscle layer closing.
We administrate the normal saline (single bolus, 0.25ml/kg) intravenously at time of muscle layer closing.
Other Name: Normal saline