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Effect of neonatal caloric deprivation on head growth and 1-year developmental status in preterm infants
Insights
Neonatal illness and caloric intake significantly impact premature infant head growth and development. Prolonged caloric deprivation, especially in small for gestational age infants, is linked to impaired head growth and lower developmental scores at one year.
Area of Science:
- Neonatology
- Pediatric Neurology
- Developmental Pediatrics
Background:
- Premature infants often experience neonatal illness and require intensive care.
- Head growth and neurodevelopmental outcomes are critical indicators of infant health.
- Understanding factors influencing head growth in premature infants is essential for optimizing care.
Purpose of the Study:
- To investigate the effects of neonatal illness and caloric intake on head growth velocity.
- To assess the impact of these factors on 1-year developmental outcomes in premature infants.
- To analyze head growth patterns in appropriate for gestational age (AGA) and small for gestational age (SGA) infants.
Main Methods:
- Study included 73 premature infants (AGA and SGA) at 30 +/- 2 weeks gestation.
- Head growth was tracked from birth to 1 year corrected age.
- Caloric intake and mechanical ventilation duration were recorded as key variables.
Main Results:
- Head growth followed a triphasic curve: arrest/suboptimal growth, catch-up growth, and standard growth.
- Growth arrest correlated with duration of caloric deprivation (<85 kcal/kg/day) and mechanical ventilation.
- Catch-up growth depended on prior caloric deprivation duration and, for SGA, caloric intake during deprivation.
Conclusions:
- Head growth normalization occurred by 3 months corrected age for most infants.
- Extended caloric deprivation (>4 weeks) was associated with below-normal head growth curves and impaired 1-year developmental scores.
- Optimizing caloric intake during neonatal intensive care is crucial for head growth and neurodevelopmental outcomes in premature infants.
Abstract:
The effects of neonatal illness and caloric intake on head growth velocity and on 1-year developmental outcome were studied in 73 appropriate (AGA) and small for gestational age (SGA) premature infants of (mean +/- SD) 30 +/- 2 weeks gestation who received intensive care during the neonatal period. Head growth from birth to 1 year of corrected age was characterized by a triphasic curve initiated by a period of growth arrest or suboptimal growth followed by a period of catch-up growth and terminated by a period of growth along standard curves. Head growth arrest or suboptimal head growth were directly related to the duration of the initial period of caloric deprivation (less than 85 kcal/kg/day) and to the duration of mechanical ventilation. Catch-up head growth was influenced by the duration of the preceding period of caloric deprivation in all infants and by the caloric intake during that phase only in SGA infants; catch-up growth was unrelated to the duration of mechanical ventilation. Head growth along standard curves occurred in all infants by 3 months of corrected age and persisted up to 1 year of corrected age. Infants calorically deprived the longest (AGA 4 to 6 weeks, SGA 2 to 3 weeks) had head growth along standards at curves below -1 SD on the growth chart; all other groups had this phase of head growth at curves between the mean and -1 SD. Infants calorically deprived for more than 4 weeks had developmental scores below normal ranges by 1 year of corrected age.