Analysis of the changes in the management of preterm newborns born in a Spanish third-level hospital in the past 10 years.

BACKGROUND: Preterm newborns require the use of the best and most current strategies to treat and prevent both acute pathology and associated sequelae. This study aimed to compare the differences in the management of preterm newborns over 10 years in a tertiary hospital in Spain and its impact on height, weight, and neurological development in the medium term. METHODS: We conducted a retrospective, observational, and analytical study examining the management and clinical variables in preterm newborns under 32 weeks of gestational age who were born in our hospital in 2011 and 2021. RESULTS: Twenty-six newborns were included in the study. Significant differences in magnesium sulfate use, continuous positive airway pressure immediately after birth, and non-invasive mechanical ventilation during hospitalization were observed. Differences were found in the use of parenteral nutrition and the timing of initiation of enteral feeding. We did not observe differences in the neurological or weight evolution in the medium term. CONCLUSIONS: Significant differences in managing preterm newborns in these 10 years were observed. Lower mortality and alterations in central nervous system ultrasound and, significantly, less growth retardation during admission in 2021 have been observed; however, it does not manifest with improvement in long-term somatometrics or neurological prognosis.

INTRODUCCIÓN: La inmadurez de los recién nacidos pretérmino (RNP) requiere el empleo de las mejores y más actuales estrategias para tratar la patología aguda y prevenir sus eventuales secuelas asociadas. El objetivo planteado es comparar las diferencias en el manejo de RNP a lo largo de diez años en un hospital de tercer nivel en España y su impacto en el desarrollo neurológico y póndero-estatural a medio plazo. MÉTODOS: Estudio retrospectivo, observacional y analítico examinando variables del manejo y clínicas de todos los RNP menores de 32 semanas de edad gestacional nacidos en nuestro hospital (nivel III-A) en 2011 y en 2021. RESULTADOS: Se incluyeron 26 infantes (2011: 10 niños, 2021: 16 niños). Observamos diferencias significativas en el uso prenatal de sulfato de magnesio, mayor uso de presión positiva continua en la vía aérea (CPAP) al ingreso y ventilación mecánica no invasiva durante el ingreso, retraso en el uso de surfactante, empleo de alimentación intravenosa e inicio precoz de la alimentación enteral. Existe una menor tasa de mortalidad y desnutrición postnatal en 2021. No observamos diferencias en la evolución neurológica o ponderal a medio plazo. CONCLUSIONES: Existen diferencias en el manejo de los prematuros en estos 10 años con mayor ajuste a las guías nacionales e internacionales vigentes. Esto se relaciona con menor mortalidad y alteraciones en la ecografía del sistema nervioso central y, significativamente, con un menor retraso en el crecimiento durante el ingreso en 2021; no se demostró mejoría del pronóstico somatométrico o neurológico a largo plazo.

Analysis of the changes in the management of preterm newborns born in a Spanish third-level hospital in the past 10 years / Análisis de los cambios en el manejo de recién nacidos prematuros nacidos en un hospital español de tercer nivel en los últimos 10 años

Abstract Background: Preterm newborns require the use of the best and most current strategies to treat and prevent both acute pathology and associated sequelae. This study aimed to compare the differences in the management of preterm newborns over 10 years in a tertiary hospital in Spain and its impact on height, weight, and neurological development in the medium term. Methods: We conducted a retrospective, observational, and analytical study examining the management and clinical variables in preterm newborns under 32 weeks of gestational age who were born in our hospital in 2011 and 2021. Results: Twenty-six newborns were included in the study. Significant differences in magnesium sulfate use, continuous positive airway pressure immediately after birth, and non-invasive mechanical ventilation during hospitalization were observed. Differences were found in the use of parenteral nutrition and the timing of initiation of enteral feeding. We did not observe differences in the neurological or weight evolution in the medium term. Conclusions: Significant differences in managing preterm newborns in these 10 years were observed. Lower mortality and alterations in central nervous system ultrasound and, significantly, less growth retardation during admission in 2021 have been observed; however, it does not manifest with improvement in long-term somatometrics or neurological prognosis.

Resumen Introducción: La inmadurez de los recién nacidos pretérmino (RNP) requiere el empleo de las mejores y más actuales estrategias para tratar la patología aguda y prevenir sus eventuales secuelas asociadas. El objetivo planteado es comparar las diferencias en el manejo de RNP a lo largo de diez años en un hospital de tercer nivel en España y su impacto en el desarrollo neurológico y póndero-estatural a medio plazo. Métodos: Estudio retrospectivo, observacional y analítico examinando variables del manejo y clínicas de todos los RNP menores de 32 semanas de edad gestacional nacidos en nuestro hospital (nivel III-A) en 2011 y en 2021. Resultados: Se incluyeron 26 infantes (2011: 10 niños, 2021: 16 niños). Observamos diferencias significativas en el uso prenatal de sulfato de magnesio, mayor uso de presión positiva continua en la vía aérea (CPAP) al ingreso y ventilación mecánica no invasiva durante el ingreso, retraso en el uso de surfactante, empleo de alimentación intravenosa e inicio precoz de la alimentación enteral. Existe una menor tasa de mortalidad y desnutrición postnatal en 2021. No observamos diferencias en la evolución neurológica o ponderal a medio plazo. Conclusiones: Existen diferencias en el manejo de los prematuros en estos 10 años con mayor ajuste a las guías nacionales e internacionales vigentes. Esto se relaciona con menor mortalidad y alteraciones en la ecografía del sistema nervioso central y, significativamente, con un menor retraso en el crecimiento durante el ingreso en 2021; no se demostró mejoría del pronóstico somatométrico o neurológico a largo plazo.

Extrauterine Growth Restriction: Need for an Accurate Definition.

Neonates show considerable variation in growth that can be recognized through serial measurements of basic variables such as weight, length, and head circumference. If possible, measurement of subcutaneous and total body fat mass can also be useful. These biometric measurements at birth may be influenced by demographics, maternal and paternal anthropometrics, maternal metabolism, preconceptional nutritional status, and placental health. Subsequent growth may depend on optimal feeding, total caloric intake, total metabolic activity, genetic makeup, postnatal morbidities, medications, and environmental conditions. For premature infants, these factors become even more important; poor in utero growth can be an important reason for spontaneous or induced preterm delivery. Later, many infants who have had intrauterine growth restriction (IUGR) and are born small for gestational age (SGA) continue to show suboptimal growth below the 10th percentile, a condition that has been defined as extrauterine growth restriction (EUGR) or postnatal growth restriction (PNGR). More importantly, a subset of these growth-restricted infants may also be at high risk of abnormal neurodevelopmental outcomes. There is a need for well-defined criteria to recognize EUGR/PNGR, so that correctional steps can be instituted in a timely fashion.

Gene coexpression network analysis reveals perirenal adipose tissue as an important target of prenatal malnutrition in sheep.

We have previously demonstrated that pre- and early postnatal malnutrition in sheep induced depot- and sex-specific changes in adipose morphological features, metabolic outcomes, and transcriptome in adulthood, with perirenal (PER) as the major target followed by subcutaneous (SUB) adipose tissue. We aimed to identify coexpressed and hub genes in SUB and PER to identify the underlying molecular mechanisms contributing to the early nutritional programming of adipose-related phenotypic outcomes. Transcriptomes of SUB and PER of male and female adult sheep with different pre- and early postnatal nutrition histories were used to construct networks of coexpressed genes likely to be functionally associated with pre- and early postnatal nutrition histories and phenotypic traits using weighted gene coexpression network analysis. The modules from PER showed enrichment of cell cycle regulation, gene expression, transmembrane transport, and metabolic processes associated with both sexes' prenatal nutrition. In SUB (only males), a module of enriched adenosine diphosphate metabolism and development correlated with prenatal nutrition. Sex-specific module enrichments were found in PER, such as chromatin modification in the male network but histone modification and mitochondria- and oxidative phosphorylation-related functions in the female network. These sex-specific modules correlated with prenatal nutrition and adipocyte size distribution patterns. Our results point to PER as a primary target of prenatal malnutrition compared to SUB, which played only a minor role. The prenatal programming of gene expression and cell cycle, potentially through epigenetic modifications, might be underlying mechanisms responsible for observed changes in PER expandability and adipocyte-size distribution patterns in adulthood in both sexes.

Effect of postnatal malnutrition on hyperoxia-induced newborn lung development

Several factors are associated with bronchopulmonary dysplasia. Among them, hyperoxia and lung immaturity are considered to be fundamental; however, the effect of malnutrition is unknown. Our objective was to evaluate the effects of 7 days of postnatal malnutrition and hyperoxia on lung weight, volume, water content, and pulmonary morphometry of premature rabbits. After csection, 28-day-old New Zealand white rabbits were randomized into four groups: control diet and room air (CA, N = 17), control diet and ¡Ý95% O2 (CH, N = 17), malnutrition and room air (MA, N = 18), and malnutrition and ¡Ý95% O2 (MH, N = 18). Malnutrition was defined as a 30% reduction of all the nutrients provided in the control diet. Treatments were maintained for 7 days, after which histological and morphometric analyses were conducted. Lung slices were stained with hematoxylin-eosin, modified orcein-resorcin or picrosirius. The results of morphometric analysis indicated that postnatal malnutrition decreased lung weight (CA: 0.83 ¡À 0.19; CH: 0.96 ¡À 0.28; MA: 0.65 ¡À 0.17; MH: 0.79 ¡À 0.22 g) and water content, as well as the number of alveoli (CA: 12.43 ¡À 3.07; CH: 8.85 ¡À 1.46; MA: 7.33 ¡À 0.88; MH: 6.36 ¡À 1.53 x 10-3/mm) and elastic and collagen fibers. Hyperoxia reduced the number of alveoli and increased septal thickening and the mean linear intercept. The reduction of alveolar number, collagen and elastic fibers was intensified when malnutrition and hyperoxia were associated. These data suggest that dietary restriction enhances the magnitude of hyperoxia-induced alveolar growth arrest and lung parenchymal remodeling. It is interesting to consider the important influence of postnatal nutrition upon lung development and ronchopulmonary dysplasia.