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Effect of Dexmedetomidine on Rocuronium-Induced Neuromuscular Blockade and Intubation Condition in Children: A
Niki Kouna1, Paraskevi Matsota1
12nd Department of Anaesthesiology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University Hospital, Athens, Greece.
Paediatric Anaesthesia
|December 20, 2025
Summary
Dexmedetomidine given before propofol anesthesia sped up rocuronium
Area of Science:
- Anesthesiology
- Pediatric Anesthesia
- Pharmacology
Background:
- Dexmedetomidine, an α2-adrenoreceptor agonist, offers sedation, analgesia, and anxiolysis with minimal respiratory depression.
- Limited pediatric data exists on intravenous dexmedetomidine's effects on neuromuscular blockade and anesthesia induction.
- This study investigates dexmedetomidine's impact on rocuronium-induced neuromuscular blockade and propofol-based anesthesia induction in children.
Purpose of the Study:
- To evaluate the effect of dexmedetomidine on rocuronium onset time.
- To assess dexmedetomidine's influence on anesthesia induction with propofol in pediatric patients.
- To compare hemodynamic stability during intubation between groups receiving dexmedetomidine and placebo.
Main Methods:
- Sixty children (ages 4-12) undergoing elective surgery were divided into two groups.
- Group D (n=30) received dexmedetomidine 0.5 μg/kg over 10 minutes before propofol induction.
- Group P (n=30) received a saline placebo over 10 minutes before propofol induction. Rocuronium was administered, and intubation conditions, neuromuscular blockade, BIS, hemodynamics, and adverse effects were recorded.
Main Results:
- Rocuronium onset time was significantly shorter in the dexmedetomidine group (177.8s) compared to placebo (205s) (p=0.021).
- Time for Bispectral Index (BIS) to reach <60 was similar between groups (34.3s vs 33.2s, p=0.772).
- The dexmedetomidine group exhibited improved hemodynamic stability during intubation (lower blood pressure and heart rate) with no differences in intubation attempts or adverse events.
Conclusions:
- Pre-anesthesia dexmedetomidine infusion in children significantly reduces rocuronium onset time.
- Dexmedetomidine administration improves hemodynamic stability during endotracheal intubation.
- The findings support dexmedetomidine as a useful adjunct for pediatric anesthesia induction.
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