Chapter 9: Infant Nutrition: Conditions and Interventions

Infant Nutrition: Conditions and Interventions vulnerable populations face unique metabolic demands that necessitate carefully tailored feeding strategies and higher nutrient densities than term infants to support accelerated growth and optimal neurodevelopment. The chapter emphasizes that protein requirements for extremely preterm infants can reach 4.5 grams per kilogram of body weight, substantially exceeding recommendations for full-term newborns. Accurate growth monitoring in former preterm infants requires clinicians to use specialized growth assessment tools such as Fenton or Olsen reference charts and to calculate corrected age based on gestational age rather than chronological age. The chapter addresses the prevalence of feeding complications in this population, including reduced oral feeding capacity, poor sucking strength, and low feeding tolerance, all of which demand skilled nutritional assessment and intervention. Key feeding strategies discussed include fortifying human milk to increase caloric and nutrient density, modifying formula composition, and implementing alternative delivery methods such as enteral tube feeding or parenteral nutrition when oral feeding proves inadequate. The chapter underscores why unfortified human milk alone cannot meet the accelerated nutritional needs of extremely preterm infants, making human milk fortification a critical intervention. Additionally, the chapter covers infants identified through newborn screening programs with metabolic and genetic conditions such as phenylketonuria and galactosemia, which require immediate dietary intervention using specialized medical foods to prevent irreversible neurological and developmental complications. The chapter concludes by identifying key public support systems including the Supplemental Nutrition Program for Women, Infants, and Children and state-level programs serving children with special health-care needs that facilitate family access to these essential specialized nutrition services.