Related Experiment Video
Updated: Mar 19, 2026
Adaptation of Microelectrode Array Technology for the Study of Anesthesia-induced Neurotoxicity in the Intact Piglet Brain
Published on: May 12, 2018
Association Between a Single General Anesthesia Exposure Before Age 36 Months and Neurocognitive Outcomes in Later
Lena S Sun1, Guohua Li2, Tonya L K Miller3
1Morgan Stanley Children's Hospital-New York Presbyterian, Columbia University Medical Center, New York, New York.
Insights
A single anesthesia exposure in young children did not impact later childhood IQ scores or behavior compared to siblings. Further research is needed for repeated or prolonged anesthesia effects.
Area of Science:
- Pediatric Anesthesiology
- Neurodevelopmental Pediatrics
- Child Psychology
Background:
- Anesthetic exposure in young animals is linked to neurotoxicity.
- Understanding potential neurocognitive and behavioral effects in children is crucial.
Purpose of the Study:
- To investigate if single anesthesia exposure in healthy young children correlates with impaired neurocognitive development and behavior in later childhood.
Main Methods:
- Sibling-matched cohort study involving 105 pairs of children aged 8-15 years.
- One sibling received general anesthesia before 36 months; the other did not.
- Neurocognitive function (IQ) and behavior were assessed using neuropsychological testing and parent reports.
Main Results:
- No statistically significant differences in full-scale, performance, or verbal IQ scores were observed between exposed and unexposed siblings.
- Secondary outcomes including memory, motor skills, attention, executive function, language, and behavior also showed no significant differences.
Conclusions:
- A single exposure to general anesthesia before 36 months in healthy children is not associated with significant differences in IQ or behavior in later childhood.
- Further investigation into the effects of repeated or prolonged anesthesia exposure and vulnerable populations is warranted.
Importance:
Exposure of young animals to commonly used anesthetics causes neurotoxicity including impaired neurocognitive function and abnormal behavior. The potential neurocognitive and behavioral effects of anesthesia exposure in young children are thus important to understand.
Objective:
To examine if a single anesthesia exposure in otherwise healthy young children was associated with impaired neurocognitive development and abnormal behavior in later childhood.
Design, Setting, And Participants:
Sibling-matched cohort study conducted between May 2009 and April 2015 at 4 university-based US pediatric tertiary care hospitals. The study cohort included sibling pairs within 36 months in age and currently 8 to 15 years old. The exposed siblings were healthy at surgery/anesthesia. Neurocognitive and behavior outcomes were prospectively assessed with retrospectively documented anesthesia exposure data.
Exposures:
A single exposure to general anesthesia during inguinal hernia surgery in the exposed sibling and no anesthesia exposure in the unexposed sibling, before age 36 months.
Main Outcomes And Measures:
The primary outcome was global cognitive function (IQ). Secondary outcomes included domain-specific neurocognitive functions and behavior. A detailed neuropsychological battery assessed IQ and domain-specific neurocognitive functions. Parents completed validated, standardized reports of behavior.
Results:
Among the 105 sibling pairs, the exposed siblings (mean age, 17.3 months at surgery/anesthesia; 9.5% female) and the unexposed siblings (44% female) had IQ testing at mean ages of 10.6 and 10.9 years, respectively. All exposed children received inhaled anesthetic agents, and anesthesia duration ranged from 20 to 240 minutes, with a median duration of 80 minutes. Mean IQ scores between exposed siblings (scores: full scale = 111; performance = 108; verbal = 111) and unexposed siblings (scores: full scale = 111; performance = 107; verbal = 111) were not statistically significantly different. Differences in mean IQ scores between sibling pairs were: full scale = -0.2 (95% CI, -2.6 to 2.9); performance = 0.5 (95% CI, -2.7 to 3.7); and verbal = -0.5 (95% CI, -3.2 to 2.2). No statistically significant differences in mean scores were found between sibling pairs in memory/learning, motor/processing speed, visuospatial function, attention, executive function, language, or behavior.
Conclusions And Relevance:
Among healthy children with a single anesthesia exposure before age 36 months, compared with healthy siblings with no anesthesia exposure, there were no statistically significant differences in IQ scores in later childhood. Further study of repeated exposure, prolonged exposure, and vulnerable subgroups is needed.
Related Concept Videos
01:22Stages of General Anesthesia
01:24General Anesthesia: Overview
General anesthesia induces unconsciousness in the whole body, while the others target specific areas or sensations. It is administered to minimize adverse effects, maintain...