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Optimal timing for the administration of intranasal dexmedetomidine for premedication in children

V M Yuen1, Theresa W Hui, M G Irwin

  • 1Department of Anaesthesiology, Queen Mary Hospital, Hong Kong, China. vtang131@hku.hk

Anaesthesia
|July 22, 2010
PubMed

Insights

Intranasal dexmedetomidine at 1 μg.kg(-1) effectively sedated pediatric patients for procedures. The onset of sedation occurred at a median of 25 minutes, aiding in intravenous cannulation.

Area of Science:

  • Pediatric Anesthesiology
  • Pharmacology
  • Sedation Techniques

Background:

  • Intranasal dexmedetomidine is used for pediatric sedation.
  • Previous studies indicate efficacy in children aged 2-12 years.
  • The precise onset time requires further investigation.

Purpose of the Study:

  • To evaluate the onset time of intranasal dexmedetomidine for pediatric sedation.
  • To determine the effectiveness of intranasal dexmedetomidine in achieving satisfactory sedation for intravenous cannulation.
  • To assess the duration of sedation induced by intranasal dexmedetomidine.

Main Methods:

  • A randomized controlled trial involving 100 children (aged 1-12 years) undergoing elective surgery.
  • Five groups were established: four received intranasal dexmedetomidine (1 μg.kg(-1)) at different pre-cannulation timings (30, 45, 60, 75 min), and one received placebo.
  • Sedation status, behavior, and vital signs were monitored until anesthesia induction.

Main Results:

  • A significantly higher proportion of children receiving intranasal dexmedetomidine achieved satisfactory sedation compared to placebo (p < 0.001).
  • No significant difference in satisfactory sedation rates was observed among the dexmedetomidine groups.
  • Overall, 62% of children receiving intranasal dexmedetomidine had satisfactory sedation at cannulation.
  • The median onset time for sedation was 25 minutes (95% CI: 25-30 min).
  • The median duration of sedation was 85 minutes (95% CI: 55-100 min).

Conclusions:

  • Intranasal dexmedetomidine at 1 μg.kg(-1) provides effective sedation for pediatric patients.
  • The optimal timing for intranasal dexmedetomidine administration to achieve sedation for intravenous cannulation appears to be around 30-75 minutes prior.
  • The drug demonstrates a rapid onset and a clinically relevant duration of action for procedural sedation in children.

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