• Paediatric anaesthesia · Jul 2008

    Randomized Controlled Trial

    Efficacy of ketamine and midazolam as co-induction agents with propofol for laryngeal mask insertion in children.

    • Shiba Goel, Neerja Bhardwaj, and Kajal Jain.
    • Department of Anaesthesia and Intensive Care, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India.
    • Paediatr Anaesth. 2008 Jul 1;18(7):628-34.

    ObjectivesUse of midazolam and ketamine lowers the induction dose of propofol (co-induction) producing hemodynamic stability.BackgroundLarge doses of propofol needed for induction and laryngeal mask (LM) insertion in children may be associated with hemodynamic and respiratory effects. Co-induction has the advantage of reducing dose and therefore maintaining hemodynamic stability.AimTo examine the effect of co-induction on hemodynamics, LM insertion and recovery in children.Methods/MaterialsA prospective, randomized, double-blind, controlled study was conducted in 60 ASA I/II children, age 1-8 years. Normal saline, ketamine 0.5 mg.kg(-1), midazolam 0.05 mg.kg(-1) were administered in groups P (propofol), PK (propofol-ketamine) and PM (propofol-midazolam), respectively, 2 min prior to the administration of the induction dose of propofol. Propofol 3.5 mg.kg(-1) (group P) or 2.5 mg.kg(-1) (groups PK and PM) was used for induction, LM inserted 30 s later and insertion conditions assessed. Heart rate and blood pressure were recorded immediately after propofol bolus, then every min till 2 min after LMA insertion. Recovery was assessed using Steward's Score.ResultIn group P, systolic blood pressure (SBP) showed a significantly greater decrease compared to group PK and group PM (P < 0.005). Only 5% of patients in groups PK and PM showed >20% fall in SBP compared to 89% in group P (P < 0.005). More children in groups PK and PM had acceptable conditions for LM insertion compared to group P (P < 0.05). The time to achieve Steward Score of 6 was longer in groups PK and PM compared to group P (P < 0.005).ConclusionIn children, the combination of propofol with ketamine or midazolam produces stable hemodynamics and improved LM insertion conditions but is associated with delayed recovery.

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