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Early assessment and neurodevelopmental outcome in very low-birth-weight infants: implications for pediatric practice
N Weisglas-Kuperus1, W Baerts, P J Sauer
1Department of Pediatrics, Sophia Children's Hospital, Rotterdam, The Netherlands.
Insights
Neonatal cerebral ultrasound is more predictive of early handicaps in very low-birth-weight infants than neurological exams at one year. However, predicting mental handicaps remains challenging, necessitating long-term follow-up for accurate assessment.
Area of Science:
- Neonatal neurology
- Developmental pediatrics
- High-risk infant follow-up
Background:
- Identifying developmental handicaps in very low-birth-weight (VLBW) infants is crucial for timely intervention.
- Early assessments are vital for guiding clinical management and parental support.
- Neurodevelopmental outcomes in VLBW infants require careful, long-term monitoring.
Purpose of the Study:
- To evaluate the utility of neonatal cerebral ultrasound, neurological examinations, and Bayley Scales of Development in predicting neurodevelopmental handicaps in VLBW infants.
- To determine the optimal age for identifying specific types of handicaps, including cerebral palsy and visual/hearing impairments.
- To assess the predictability of mental handicaps in VLBW infants.
Main Methods:
- A cohort of 79 high-risk VLBW infants was followed prospectively.
- Assessments included neonatal cerebral ultrasound, neurological examinations, and the Bayley Infant Scales of Development at 1 and 2 years.
- Neurodevelopmental outcome was evaluated at 3.6 years of age.
Main Results:
- At 3.6 years, 11% had minor and 5% had major handicaps; 11% had cerebral palsy, reliably diagnosed at 2 years.
- Neonatal intraparenchymal damage on ultrasound had higher positive predictive value for early handicaps than abnormal neurological exams at 1 year.
- Visual handicaps (5%) and severe hearing deficits (1%) were detected within the first year; mental handicaps (9%) were difficult to predict, with only 35% of infants showing delay at 2 years ultimately having a handicap.
Conclusions:
- Neonatal cerebral ultrasound is a valuable tool for early identification of potential handicaps in VLBW infants.
- Cerebral palsy diagnosis is most reliable at 2 years of age.
- Pediatricians should exercise caution when interpreting infant developmental tests due to poor prediction of long-term mental handicaps; long-term follow-up is essential.
Abstract:
To determine which assessments are useful, at what age, in order to identify handicaps in very low-birth-weight infants, neonatal cerebral ultrasound findings, neurological examinations and the mental scale of the Bayley Infant Scales of Development at 1 and 2 years of age were examined in relation to neurodevelopmental outcome at 3.6 years of age in a cohort of 79 high-risk very low-birth-weight infants. At 3.6 years of age, a minor handicap was found in 9 (11%) and a major handicap in 4 (5%) children. Cerebral palsy was found in 9 (11%) children at 3.6 years of age and could only be diagnosed reliably at 2 years of age. For short-term follow-up, as feedback to the neonatologist, the positive predictive value of intraparenchymal damage, as detected by neonatal cerebral ultrasound, was greater than the positive predictive value of a definitely abnormal neurological examination at 1 year of age. Visual handicaps (n = 4, 5%) and severe hearing deficits (n = 1, 1%) were all detected in the first year of life. A mental handicap was found in 7 (9%) children. It was impossible to predict mental handicaps for the individual child. Only 35% of the children with a mental delay at 2 years of age had a mental handicap at 3.6 years of age, whereas 35% had a normal cognitive outcome. Pediatricians therefore should be cautious in the interpretation of developmental test results in infancy. Long-term follow-up is essential for the child and its parents.