Evidence-based Discharge Nutrition to Optimize Preterm Infant Outcomes

Impact of Exclusive Breastfeeding and Extrauterine Growth Restriction on Post-Discharge Growth in Preterm Infants: A Longitudinal Cohort Study in a Kangaroo Mother Care Program

BACKGROUND/OBJECTIVES

Extrauterine growth restriction (EUGR) and exclusive breastfeeding (EBF) are critical factors influencing early post-discharge growth in preterm infants. Although EBF is recommended in Kangaroo Mother Care (KMC) programs, its association with early anthropometric recovery remains unclear. This study evaluated the association between EUGR at 40 weeks of corrected age and EBF at 40 weeks, 3 months, and 6 months with anthropometric growth and acute malnutrition in preterm infants during the first six months of corrected age.

METHODS

A retrospective longitudinal cohort study was conducted, including 117 preterm infants (≤34 weeks of gestation) enrolled in the KMC program. Changes in weight, length, and head circumference z-scores and the incidence of acute malnutrition were analyzed using generalized estimating equations (GEEs). EUGR was defined as weight <10th percentile at 40 weeks. Acute malnutrition was defined as a weight-for-length z-score ≤-2.

RESULTS

EUGR was observed in 23.9% of the infants. EBF prevalence was 53% at 40 weeks and 40% at three and six months, respectively. EBF at 40 weeks was associated with a reduced weight z-score (coefficient: -0.29; p = 0.030), EBF at 3 months increased the weight z-score (coefficient: 0.34; p = 0.014), and EBF at 6 months reduced the risk of acute malnutrition (coefficient: -1.02; p = 0.036). Infants with EUGR showed greater weight gain over time (coefficient: 0.37; p = 0.020) yet remained below their non-EUGR peers.

CONCLUSIONS

EBF during the first six months post-discharge supports weight gain and reduces the risk of malnutrition. However, EBF at 40 weeks may not ensure the immediate recovery of weight. EUGR is a key determinant of early growth.

Growth at 2 years corrected age in preterm infants discharged on two different breast milk enhancements: An observational study

OBJECTIVE

Breast milk (BM) enhancement is often used to meet the nutritional needs of preterm infants after hospital discharge to achieve optimal growth. This study compared growth at 18-28 months corrected age (CA) among very preterm (VP) and very low birth weight (VLBW) infants discharged from the neonatal intensive care units (NICUs) on two BM enhancements.

METHODS

We conducted a retrospective chart review study of infants born between January 1, 2013 and December 31, 2017, with gestational age < 32 weeks or birthweight < 1500 g, discharged from the NICU on BM enhancements; fortification of BM with infant formula additives (BM-F) or unfortified BM supplemented with bottle feeds of infant formula (BM-S). BM enhancements were nonrandomized and determined by the medical team. A linear mixed model regression analysis with propensity score matching was used to estimate the adjusted associations between the nutrition plan at discharge and growth outcomes at 18-28 months CA follow-up.

RESULTS

Two hundred and fifty-one VLBW/VP infants were included. Compared with BM-S, infants discharged on BM-F were more likely to continue receiving BM at 8-12 months CA, and had lower head circumference, weight-for-length z scores, and higher incidence of moderate malnutrition (p ≤ 0.01). After adjusting for confounders, discharge on BM-F was associated with a lower incidence of overweight/obesity at 18-28 months CA (odds interval: 0.45; confidence interval: 0.21-0.96; p = 0.04).

CONCLUSIONS

This retrospective study suggests that VLBW/VP infants discharged on BM-F received BM longer, had lower growth parameter and were less likely to be overweight/obese at 18-28 months CA. Further studies are needed to evaluate the role of postdischarge nutrition on preterm born children's growth, metabolic disease, and neurodevelopmental outcomes.

A Narrative Review of Strategies to Optimize Nutrition, Feeding, and Growth among Preterm-Born Infants: Implications for Practice

Preterm birth is the leading cause of neonatal and under-5 mortality globally, and healthcare-related burden and nutrition-related morbidities are unsustainable, particularly in resource-limited regions. Additionally, preterm infants are susceptible to multiple adverse outcomes including growth faltering, suboptimal neurodevelopment, and multisystemic morbidities. Maturation, healing, repair, and restoration to normalcy in preterm-born infants require optimizing nutrition; only then, prognosis, growth, neurodevelopment, and overall quality of life can improve. In this article, we discuss the various evidence-based feeding and nutritional strategies that can be applicable even in resource-limited settings, where resources and infrastructure for advanced neonatal care are limited. This article addresses nutrition, feeding strategies, and growth monitoring in the neonatal intensive care unit and at discharge to optimize nutrition, growth, and development.

Is an Exclusive Human Milk Diet at the Time of Neonatal Intensive Care Unit Discharge Adequate to Maintain Growth and Neurodevelopment among Very Preterm Infants?

Background: An exclusive human milk (EHM) diet has numerous benefits. Formula supplementation may be recommended for former preterm infants at the time of neonatal intensive care unit (NICU) discharge to meet perceived metabolic demands and caloric goals. Recommendations addressing postdischarge nutrition for very preterm infants (VPTIs) are controversial, as the benefits of human milk supplementation regarding long-term growth, neurodevelopment, and chronic conditions are mixed. Objective: To compare growth and neurodevelopment of former VPTI fed an EHM diet to a supplemented/formula diet at NICU discharge. Materials and Methods: A retrospective cohort study of VPTI was followed at the Regional Neonatal Follow-up Program. Patients were categorized by diet at NICU discharge: EHM diet; mixed diet (EHM and formula); and exclusive formula diet. Growth percentile ranks at the first neonatal follow-up visit and 3 years of age were compared by diet type at NICU discharge. Neurodevelopmental outcomes as measured by the Bayley Scales of Infant Development 3rd Edition at 3 years of age were also compared. Results: Among 835 VPTIs, weight percentiles at the first neonatal follow-up visit were similar between the three NICU discharge diet types. One hundred fifty-eight subjects received neurodevelopmental evaluations at 3 years of age; anthropometrics and neurodevelopment were similar irrespective of diet at NICU discharge. Conclusion: An EHM diet at NICU discharge is appropriate to support growth in infancy as well as growth and neurodevelopment through 3 years of age. Thus, this raises the question of whether routine nutritional supplementation is necessary for VPTIs at NICU discharge.

A Pilot Single-Site Randomized Control Trial: Investigating the Use of Donor Milk in Late Preterm and Term Infants in the Neonatal Intensive Care Unit

OBJECTIVE

We aimed to study donor milk (DM) supplementation when mother's own milk (MOM) was unavailable in term and late preterm infants (LPIs) admitted to the neonatal intensive care unit (NICU). We hypothesized that this study would be feasible, defined by the rate of consent, diet adherence, and study completion. We further hypothesized that compared with formula supplementation, DM supplementation, for no longer than 7 days from birth, would be associated with an increase in breastfeeding attempts and the percentage of MOM (MOM%) without adversely affecting growth. Breastfeeding attempts and MOM% were assessed over 48 hours at the end of the intervention, which was defined as NICU discharge or at the end of supplementation, whichever came sooner.

STUDY DESIGN

This was a pilot study (n = 32). Infants with a gestational age > 34 weeks admitted to the NICU were included. Infants were randomized to one of two groups: human milk (MOM + DM) or formula (MOM + F).

RESULTS

The consent rate was 52%. Adherence to the study diet was 97%, and completion was 100%. When the MOM + DM group was compared with the MOM + F group, there was no difference in breastfeeding attempts (median [interquartile range]: 3.5 [1.5-6] vs. 1.5 [0.5-4] times, p = 0.1) or MOM% (60 vs. 59%, p = 0.9). Weight and length at multiple time points were similar when the groups were compared.

CONCLUSION

A study randomizing term and LPIs in the NICU to DM or formula when MOM was unavailable is feasible. It remains unclear if DM improves breastfeeding success in this population.

KEY POINTS

· A study that randomizes term and late preterm infants in the NICU to DM or formula supplementation when mother's own milk is not available is feasible.. · It remains unclear if DM compared to formula supplementation improves direct breastfeeding.. · In general, growth was similar in infants who received DM or formula as a supplement..

Multidisciplinary evidence-based tools for improving consistency of care and neonatal nutrition

BACKGROUND

Extrauterine growth restriction from inadequate nutrition remains a significant morbidity in very low birth weight infants. Participants in the California Perinatal Quality Care Collaborative Quality Improvement Collaborative, Grow, Babies, Grow! developed or refined tools to improve nutrition and reduce practice variation.

METHOD

Five Neonatal Intensive Care Units describe the development and implementation of nutrition tools. Tools include Parenteral Nutrition Guidelines, Automated Feeding Protocol, electronic medical record Order Set, Nutrition Time-Out Rounding Tool, and a Discharge Nutrition Recommendations. 15 of 22 participant sites completed a survey regarding tool value and implementation.

RESULTS

Reduced growth failure at discharge was observed in four of five NICUs, 11-32% improvement. Tools assisted with earlier TPN initiation (8 h) and reaching full feeds (2-5 days). TPN support decreased by 5 days. 80% of survey respondents rated the tools as valuable.

CONCLUSION

Evidence and consensus-based nutrition tools help promote standardization, leading to improved and sustainable outcomes.

After NICU discharge: Feeding and growth of low-income urban preterm infants through the first year

BACKGROUND

Little is known about preterm infant feeding and growth in the outpatient setting, and there are no standardized post-hospital discharge feeding guidelines. This study aims to describe post-neonatal intensive care unit (NICU) discharge growth trajectories of very preterm (<32 weeks gestational age (GA)) and moderately preterm (32-34 0/7 weeks GA) infants managed by community providers and to determine the association between post-discharge feeding type and growth Z-scores and z-score changes through 12 months corrected age (CA).

METHODS

This retrospective cohort study included very preterm infants (n = 104) and moderately preterm infants (n = 109) born 2010-2014 and followed in community clinics for low-income, urban families. Infant home feeding and anthropometry were abstracted from medical records. Repeated measures analysis of variance calculated adjusted growth z-scores and z-score differences between 4 and 12 months CA. Linear regression models estimated associations between 4 months CA feeding type and 12 months CA anthropometry.

RESULTS

Moderately preterm infants on nutrient-enriched vs. standard term feeds at 4 months CA had significantly lower length z-scores at NICU discharge that persisted to 12 months CA (-0.04 (0.13) vs. 0.37 (0.21), respectively, P = .03), with comparable length z-score increase for both groups between 4 and 12 months CA. Very preterm infants' 4 months CA feeding type predicted 12 month CA body mass index z-scores (β=-0.66 (-1.28, -0.04)).

CONCLUSION

Community providers may manage preterm infant post-NICU discharge feeding in the context of growth. Further research is needed to explore modifiable drivers of infant feeding and socio-environmental factors that influence preterm infant growth trajectories.

Dilemmas in human milk fortification

Fortification of human milk is the standard of care for very low birth weight (VLBW) infants and is required to support adequate postnatal growth and development. Achieving adequate growth velocity and preventing growth faltering is critical for the developing neonatal brain and optimizing long-term neurodevelopmental outcomes. Mother's milk is the gold standard nutrition to feed preterm infants, however, it does not provide the nutrients needed to support the growth of VLBW infants. After the decision is made to use mother's milk (if available) or alternatively, donor human milk, many dilemmas exist with regards to additional treatment decisions surrounding the type of fortification to use, when to fortify, and the duration of fortification. In this article, we will review the differences in mother's milk compared to donor milk, the different types of human milk fortifiers, the optimal timing of fortification, and discuss when to discontinue human milk fortification.

Body Composition and "Catch-Up" Fat Growth in Healthy Small for Gestational Age Preterm Infants and Neurodevelopmental Outcomes

To examine the growth and body composition of small for gestational age (SGA) and appropriate for gestational age (AGA) very low birth weight infants (VLBW) and their outpatient neurodevelopmental outcomes. From 2006-2012, VLBW infants (n = 57 of 92) admitted to the Neonatal Intensive Care Unit (NICU) had serial air displacement plethysmography (ADP) scans and were followed as outpatients. Serial developmental testing (CAT/CLAMS, Peabody Gross Motor Scales) and anthropometrics were obtained from n = 37 infants (29 AGA and 8 SGA) and analyzed via repeated measures analyses of variances. The percentage of body fat, percentage of lean mass, and weight gain were statistically significant between SGA and AGA groups at the first ADP assessment. There was no difference between the two groups in outpatient neurodevelopmental testing. Weight gain as "catch-up" body fat accrual occurs by 67 weeks of PMA. This catch-up growth is associated with normal SGA preterm neurodevelopment as compared to AGA preterm infants.