[Anesthetic induction of children with high concentrations of sevoflurane]

Area of Science:

• Anesthesiology
• Pediatric Medicine
• Pharmacology

Background:

• Sevoflurane is a widely used inhalation anesthetic for pediatric anesthesia.
• Optimizing induction and intubation techniques in children is crucial for patient safety and procedural efficiency.
• The use of high sevoflurane concentrations for intubation without muscle relaxants warrants investigation.

Purpose of the Study:

• To evaluate the efficacy and safety of high concentrations of sevoflurane (4% and 6.4%) for induction and intubation in children.
• To compare induction times and intubation success rates between the two sevoflurane concentrations.
• To identify and assess the incidence of adverse events, particularly convulsions.

Main Methods:

• A study involving 180 children aged 1 to 6 years and 12 months undergoing anesthesia.
• Administration of either 4% or 6.4% sevoflurane for induction and intubation.
• Monitoring of induction time, intubation success, and adverse events, including cardiovascular parameters and convulsions.

Main Results:

• Average induction times were 56 seconds for 4% sevoflurane and 47 seconds for 6.4% sevoflurane.
• Intubation failure occurred in 8 out of 90 patients (8.9%) receiving 4% sevoflurane due to airway reflexes.
• Convulsions during induction occurred in 6% of patients, more frequently with 6.4% sevoflurane, but were transient and self-limiting. No significant cardiovascular side effects were observed.

Conclusions:

• High concentrations of sevoflurane enable smooth intubation in children without muscle relaxants.
• Sevoflurane at high doses is a viable option for pediatric anesthesia induction, despite the potential for transient convulsions.
• Further research may explore strategies to mitigate convulsion risk while maintaining anesthetic efficacy.