Impact of a targeted volume-increase nutrition guideline on growth and body mass index in premature infants: A retrospective review.

BACKGROUND: The negative impact of disproportionate growth in premature infants is well documented, but optimal nutrition practices needed to prevent an unhealthy body mass index (BMI) remain unclear. METHODS: An evidence-based, volume-increase guideline that advanced feeding volumes from 150-160 to 170-180 ml/kg/day between the postmenstrual age (PMA) of 31 0/7 and 34 0/7 weeks was implemented in October 2017 for infants born at ≤32 0/7 weeks' gestational age. Data were collected on 262 infants' weight and length at birth and at discharge for 20 months before and 21 months after guideline implementation, and retrospective analysis was conducted to determine disproportionate growth by comparing BMIs (in g/cm2 ) at birth and at discharge. Changes in infants' body habitus were determined through bivariate analysis of weight and length z-scores from the Fenton growth curve. RESULTS: Implementation of a targeted volume nutrition guideline resulted in fewer infants with growth failure, defined as weight <10th percentile (19.5% vs 11.2%; P = .06) at discharge. Infants who received treatment according to the targeted nutrition guideline had a statistically significant reduction in disproportionately low BMI (8.6% vs 2.5%; P = .0380) and an increase in disproportionately high BMIs (4.3% vs 12.3%; P = .025). There was minor change in the percentage of disproportionately large infants who received the guidelines from birth to discharge (11.5% vs 12.3%). CONCLUSIONS: A targeted volume-increase nutrition guideline may prevent growth failure, with some effects on disproportionate growth in preterm infants born at ≤32 0/7 weeks' gestational age.

Transcutaneous carbon dioxide pattern and trend over time in preterm infants.

BACKGROUND: Chronic lung disease remains a burden for extremely preterm infants. The changes in ventilation over time and optimal ventilatory management remains unknown. Newer, non-invasive technologies provide insight into these patterns. METHODS: This single-center prospective cohort study enrolled infants ≤32 0/7 weeks. We obtained epochs of transcutaneous carbon dioxide (TcCO2) measurements twice each week to describe the pattern of hypercarbia throughout their hospitalization. RESULTS: Patterns of hypercarbia varied based on birth gestational age and post-menstrual age (PMA) (p = 0.03), regardless of respiratory support. Infants receiving the most respiratory support had values 16-21 mmHg higher than those on room air (p < 0.001). Infants born at the youngest gestational ages had the greatest total change but the rate of change was slower (p = 0.049) compared to infants born at later gestational ages. All infants had TcCO2 values stabilize by 31-33 weeks PMA, when values were not significantly different compared to discharge. No rebound was observed when infants weaned off invasive support. CONCLUSIONS: Hypercarbia improves as infants approached 31-33 weeks PMA. Hypercarbia was the highest in the most immature infants and improved with age and growth despite weaning respiratory support. IMPACT: This study describes the evolution of hypercarbia as very preterm infants grow and develop. The pattern of ventilation is significantly different depending on the gestational age at birth and post-menstrual age. Average transcutaneous carbon dioxide (TCO2) decreased over time as infants became more mature despite weaning respiratory support. This improvement was most significant in infants born at the lowest gestational ages.

An Initiative to Reduce Preterm Infants Pre-discharge Growth Failure Through Time-specific Feeding Volume Increase.

Very low birth weight infants often demonstrate poor postnatal longitudinal growth, which negatively impacts survival rates and long-term health outcomes. Improving extrauterine growth restriction (EUGR) among extremely premature infants has become a significant focus of quality improvement initiatives. Prior efforts in the University of Massachusetts Memorial Medical Center neonatal intensive care unit were unsuccessful in improving the EUGR rate at discharge. METHODS: The primary aim of this initiative was to improve EUGR at discharge [defined as weight less than 10th percentile for postmenstrual age (PMA)] for infants born ≤32 0/7 weeks from a baseline of 25% to 20% by June 2019. We excluded all small for gestational age infants due to the limitation in the EUGR definition. A multidisciplinary team implemented evidence-based nutritional guideline changes using the Institute of Healthcare Improvement methods. The most notable change was the time-specific feeding volume advancement that increased the goal feeding volume between 31 0/7 and 34 0/7 weeks PMA from 150-160 to 170-180 milliliters per kilogram per day. The team monitored nutritional intake, weight, necrotizing enterocolitis (NEC), bronchopulmonary dysplasia (BPD), and length of stay (LOS). RESULTS: The EUGR rate improved from 25% to 12% after initiation of increased time-specific, enteral feeding guidelines at 31-34 weeks PMA. NEC rate, BPD rate, and LOS remained unchanged throughout the initiative. CONCLUSIONS: By implementing a time-specific volume increase guideline from 31 0/7 to 34 0/7 weeks PMA, the EUGR rate improved from baseline of 25% to 12% without increasing NEC rate, BPD rate, and LOS.