Neurodevelopmental outcome at seven years in term, acidotic newborns

Area of Science:

• Neonatal Medicine
• Neurodevelopmental Pediatrics
• Perinatal Research

Background:

• Acidosis in term infants can result from various perinatal events.
• Hypoxic ischemic encephalopathy (HIE) is a major cause of neonatal brain injury.
• Long-term neurodevelopmental outcomes in these infants require further investigation.

Purpose of the Study:

• To assess neurodevelopmental outcomes at 7 years in a cohort of term infants with acidosis.
• To determine the influence of hypoxic ischemic encephalopathy (HIE) severity on these outcomes.
• To differentiate the impact of acidosis alone versus acidosis with HIE.

Main Methods:

• A cohort of 44 full-term infants with acidosis was followed to age 7.
• Infants were categorized by acidosis severity (mild/severe) and presence/absence of HIE.
• Neurodevelopmental assessment included Wechsler Intelligence Scale for Children (WISC-IVUK) and Achenbach Child Behaviour Checklist (CBCL).

Main Results:

• No significant differences in WISC-IVUK scores were observed in children without HIE, regardless of acidosis severity.
• Children with HIE grade I demonstrated significantly higher perceptual reasoning scores compared to those with HIE grade III (p<0.01).
• No differences in CBCL scores were found between any of the study groups.

Conclusions:

• Neurodevelopmental impairment at school age in acidotic infants is associated with the degree of hypoxic ischemic encephalopathy (HIE).
• Acidosis without clinical encephalopathy appears to have a normal neurodevelopmental outcome at 7 years.
• The severity of HIE is a critical determinant of long-term neurodevelopmental deficits.