Efecto de tres dietas enterales con diferente contenido en proteínas sobre el metabolismo proteico en lactantes críticamente enfermos: un ensayo clínico aleatorizado / Effect of three enteral diets with different protein contents on protein metabolism in critically ill infants: A randomized controlled trial

Introducción: No se ha establecido cuál es el aporte óptimo para mejorar el metabolismo proteico sin producir efectos adversos en lactantes gravemente enfermos. Nuestro objetivo fue analizar si un mayor aporte proteico a través de la nutrición enteral se relaciona con una mejoría en el balance proteico en lactantes críticamente enfermos. Material y métodos: Se diseñó un estudio multicéntrico, prospectivo, aleatorizado y controlado (diciembre de 2016 a junio de 2019). Se incluyeron lactantes críticamente enfermos con nutrición enteral, asignándose aleatoriamente a tres dietas con diferente contenido proteico: estándar (1,7g/100ml), hiperproteica (2,7g/100ml) e hiperproteica suplementada (5,1g/100ml). Se realizaron análisis de sangre y orina y se calculó el balance nitrogenado en el momento basal y tras 3-5días de nutrición. Se analizó la variación del balance nitrogenado y de las proteínas séricas (proteínas totales, albúmina, transferrina, prealbúmina y proteína ligada al retinol) a lo largo del periodo de estudio. Resultados: Noventa y nueve lactantes (33 por grupo) completaron el estudio. No se encontraron diferencias entre grupos en características demográficas, puntuaciones de gravedad y otros tratamientos recibidos, salvo corticoides, administrados en una mayor proporción de pacientes del tercer grupo. Tuvo lugar un aumento significativo de los niveles de prealbúmina y proteína ligada al retinol en los grupos con nutrición hiperproteica e hiperproteica suplementada. El balance nitrogenado aumentó en todos los grupos, pero este incremento no fue significativo en el grupo de nutrición hiperproteica suplementada. No se encontraron diferencias en cuanto a tolerancia gastrointestinal. Los pacientes con nutrición hiperproteica suplementada presentaron niveles superiores de urea sérica y mayor incidencia de hiperuremia. (AU)

Introduction: The optimal intake to improve protein metabolism without producing adverse effects in seriously ill infants has yet to be established. The aim of our study was to analyse whether an increased protein intake delivered through enteral nutrition would be associated with an improvement in nitrogen balance and serum protein levels in critically ill infants. Material and methods: We conducted a multicentre, prospective randomized controlled trial (December 2016-June 2019). The sample consisted of critically ill infants receiving enteral nutrition assigned randomly to 3 protein content groups: standard diet (1.7g/dL), protein-enriched diet (2.7g/dL) and high protein-enriched diet (5.1g/dL). Blood and urine tests were performed, and we assessed nitrogen balance at baseline and at 3 to 5days of the diet. We analysed variations in nitrogen balance and serum protein levels (total protein, albumin, transferrin, prealbumin, and retinol-binding protein) throughout the study period. Results: Ninety-nine infants (33 per group) completed the study. We did not find any differences were between groups in demographic characteristics, severity scores or prescribed medications, except for corticosteroids, administered in a higher proportion of patients in the third group. We observed significant increases in prealbumin and retinol-binding protein levels in patients receiving the protein-enriched and high protein-enriched diets at 3 to 5days compared to baseline. The nitrogen balance increased in all groups, but the differences were not significant in the high protein-enriched group. There were no differences in gastrointestinal tolerance. Patients fed high protein-enriched formula had higher levels of serum urea, with a higher incidence of hyperuraemia in this group. (AU)

Effect of three enteral diets with different protein contents on protein metabolism in critically ill infants: a randomized controlled trial.

INTRODUCTION: The optimal intake to improve protein metabolism without producing adverse effects in seriously ill infants has yet to be established. The aim of our study was to analyse whether an increased protein intake delivered through enteral nutrition would be associated with an improvement in nitrogen balance and serum protein levels in critically ill infants. METHODS: We conducted a multicentre, prospective randomized controlled trial (December 2016-June 2019). The sample consisted of critically ill infants receiving enteral nutrition assigned randomly to 3 protein content groups: standard diet (1.7 g/dL), protein-enriched diet (2.7 g/dL) and high protein-enriched diet (5.1 g/dL). Blood and urine tests were performed, and we assessed nitrogen balance at baseline and at 3-5 days of the diet. We analysed variations in nitrogen balance and serum protein levels (total protein, albumin, transferrin, prealbumin, and retinol-binding protein) throughout the study period. RESULTS: Ninety-nine infants (33 per group) completed the study. We did not find any differences were between groups in demographic characteristics, severity scores or prescribed medications, except for corticosteroids, administered in a higher proportion of patients in the third group. We observed significant increases in prealbumin and retinol-binding protein levels in patients receiving the protein-enriched and high protein-enriched diets at 3-5 days compared to baseline. The nitrogen balance increased in all groups, but the differences were not significant in the high protein-enriched group. There were no differences in gastrointestinal tolerance. Patients fed high protein-enriched formula had higher levels of serum urea, with a higher incidence of hyperuraemia in this group. CONCLUSION: Enteral administration of higher amounts of protein improves serum protein levels in critically ill children. A protein intake of 2.2 g/kg/day is generally safe and well tolerated, whereas an intake of 3.4 g/kg/day may produce hyperuraemia in some patients.

Change on the Circulation of Respiratory Viruses and Pediatric Healthcare Utilization during the COVID-19 Pandemic in Asturias, Northern Spain.

(1) Background: The COVID-19 pandemic and the implementation of restrictions and nonpharmaceutical interventions (NPIs) changed the trends in respiratory viral circulation and the pattern in pediatric healthcare utilization; (2) Methods: A retrospective, multicenter observational study designed to analyze the impact of the pandemic on pediatric healthcare utilization and the viral circulation pattern in children in a region in Northern Spain was carried out. Viral diagnostics data from all nasal or pharyngeal swabs collected in children in Asturias during the periods of March 2018−September 2019 and March 2020−September 2021 were analyzed, as well as the number of pediatric hospitalizations and emergency visits; (3) Results: A total of 14,640 samples were collected during the pandemic period. Of these, at least one respiratory virus was detected in 2940 (20.1%) while 5568/10,298 samples were positive in the pre-pandemic period (54.1%); p < 0.001. The detection of both enveloped and non-enveloped viruses decreased among periods (p < 0.001). After week 14, 2020, enveloped viruses were no longer detected until one year later, while non-enveloped viruses continued to be detected in children. Overall, a mean of 4946.8 (95% CI 4519.1−5374.4) pediatric emergency visits per month during the period 2018−2019 as compared to 2496.5 (95% CI 2086.4−2906.5) for 2020−2021 occurred (p < 0.001). The mean of pediatric hospitalizations also significantly decreased between periods, as follows: 346.6 (95% CI 313−380.2) in 2018−2019 vs. 161.1 (95% CI 138.4−183.8); p < 0.001; (4) Conclusions: Our study showed a remarkably reduction in pediatric hospitalizations and emergency visits and a change in the pattern of viral circulation during the COVID-19 pandemic in Asturias. The usual seasonal respiratory viruses, namely influenza or RSV were nearly absent in the pediatric population during the pandemic.

Pulsus paradoxus / Paradoxical pulse

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