Early Neurodevelopmental Outcomes Following Exposure to General Anesthesia in Infancy: EGAIN, a Prospective Cohort...

Area of Science:

• Pediatric Neurodevelopment
• Anesthesiology
• Developmental Psychology

Background:

• Early-life general anesthesia (GA) effects on neurodevelopment are debated in humans, despite animal studies indicating negative neural outcomes.
• Previous human research on early GA exposure and neurodevelopment has yielded inconsistent findings.
• This study investigates the impact of a single GA exposure for minor surgery on healthy children's neurodevelopment.

Purpose of the Study:

• To assess the neurodevelopmental effects of a single general anesthesia exposure in healthy infants.
• To utilize clinical, behavioral, and neurophysiological measures to evaluate outcomes at multiple time-points.
• To compare neurodevelopmental trajectories between GA-exposed and non-exposed children.

Main Methods:

• A prospective cohort of 250 healthy infants undergoing GA for minor surgery before 15 months was compared to a non-exposed cohort.
• Clinical assessments included Bayley Scales of Infant and Toddler Development-III (BSID-III) and Child Behavior Checklist (CBCL1½-5) at 24 months.
• Experimental tests for memory and attention, along with event-related potentials (neurophysiology), were conducted at 6 and 18 months.

Main Results:

• No significant differences were observed in cognitive, language, or motor domains of the BSID-III at 24 months.
• GA-exposed children exhibited poorer parent-reported scores for general adaptability (BSID-III) and higher internalizing behavior (CBCL1½-5).
• Differences in 4 experimental tests related to memory and attention, and neurophysiological measures were detected at 6 and 18 months.

Conclusions:

• Early single exposure to general anesthesia did not impair major neurodevelopmental outcomes by 24 months.
• Subtle behavioral differences and altered neurophysiological responses were evident in infancy.
• Neurophysiological assessments are valuable complements to clinical evaluations for understanding early GA exposure impacts.