Amplitude-Integrated Electroencephalogram in Premature Infants: A Prospective Cohort Study

Area of Science:

• Neonatal Neurology
• Neurophysiology
• Pediatric Medicine

Background:

• Amplitude-integrated electroencephalogram (aEEG) is crucial for monitoring brain activity in neonates.
• Understanding normative aEEG patterns across different gestational ages is essential for accurate interpretation and clinical decision-making.
• Preterm neonates exhibit unique neurodevelopmental trajectories that influence their brain function and EEG patterns.

Purpose of the Study:

• To establish and interpret amplitude-integrated electroencephalogram (aEEG) patterns in stable preterm neonates.
• To compare aEEG patterns across different gestational age groups using established classification systems.
• To identify correlations between aEEG parameters and gestational age in preterm infants.

Main Methods:

• Prospective cohort study of stable preterm neonates (24 0/7 to 36 6/7 weeks gestation).
• aEEG recordings were obtained in the first and second week of life.
• Interpretation utilized L. Hellström-Westas, Burdjalov, and Magalhães classifications; subgroup analysis was performed for infants ≤30 and >30 weeks gestation.

Main Results:

• 60% of neonates showed normal voltage patterns in the first week, increasing to 80% by the second week.
• Infants ≤30 weeks predominantly had discontinuous patterns, with 50% transitioning to continuous patterns by the second week.
• The Cerebral Function Monitor (CFM) score positively correlated with advancing gestational age, with a median score of 12 in the second week compared to 8 in the first.

Conclusions:

• aEEG patterns are predominantly continuous and normal in preterm infants >30 weeks gestation, and discontinuous in those ≤30 weeks.
• The Cerebral Function Monitor (CFM) score demonstrates a positive correlation with increasing gestational age.
• These findings aid in the neurodevelopmental assessment and monitoring of preterm infants.