Evolución clínica y gasométrica en recién nacidos pretérmino en ventilación por volumen / Clinical and gasometric evolution in preterm newborns with volume ventilation

Resumen Antecedentes: La ventilación mecánica continúa siendo una herramienta esencial en el cuidado de los recién nacidos prematuros. Hay evidencia de que la ventilación limitada por volumen (VLV) tiene ventajas sobre ventilación limitada por presión (VLP). Objetivo: Determinar la evolución clínica y gasométrica en los recién nacidos pretérmino en VLV en comparación con VLP. Material y métodos: Fue una investigación observacional y analítica en una unidad de cuidados intensivos neonatales, donde se incluyeron 80 recién nacidos ≤ 32 semanas de gestación y ≤ 1,000 g al nacimiento divididos en dos grupos. Resultados: Se observó diferencia estadísticamente significativa en días de ventilación, favoreciendo a VLV (p = 0.002); en las variables hipoxemia e hipocarbia, que son directamente afectadas por el modo ventilatorio, se encontró menor grado de afectación en VLV pero sin diferencia estadística. Se encontró en el grupo de pacientes con VLV menor acidosis respiratoria (p = 0.05) y menor requerimiento de fracción inspirada de oxígeno (FIO2) (p = 0.04). Conclusión: Al igual que la literatura, nuestros resultados comprueban beneficios como disminución de días de ventilación, disminución de acidosis y necesidades menores de FIO2 con el uso de VLV.

Abstract Background: Mechanical ventilation continues to be an essential tool in the care of premature newborns, there is evidence that volume-limited ventilation (VLV) has advantages over pressure-limited ventilation (VLP). Objective: To determine the clinical and gasometric evolution in newborns I preterm VLV compared to VLP. Material and methods: It was an observational and analytical research in a neonatal intensive care unit, where 80 newborns were included ≤ 32 weeks of gestation and ≤ 1000 grams at birth divided into two groups. Results: Statistically significant difference was observed in ventilation days, favouring VLV (p=0.002); in hypoxemia and hypocarbia variables, which are directly affected by ventilatory mode, lower degree of affection was found in VLV but without statistical difference. It was found in the group of patients with VLV lower respiratory acidosis (p=0.05), and lower FIO2 requirements (p=0.04). Conclusion: Like literature, our results prove benefits such as decreased ventilation days, decreased acidosis and lower needs of FIO2 with the use of VLV.

Prevalencia de Hipertensión Arterial en una unidad de cuidados intensivos neonatales / Prevalence of Arterial Hypertension in a neonatal intensive care unit

INTRODUCCIÓN: La prevalencia de hipertensión arterial neonatal en las unidades de cuidados intensivos neonatales (UCIN) varía entre el 3 y el 9%, sin embargo, no existe información actualizada de Latinoamérica. OBJETIVO: Estimar la prevalencia de hipertensión arterial y evaluar su asociación con causas previa mente relacionadas con esta condición. PACIENTES Y MÉTODO: Estudio transversal que incluyó a todos los niños internados en una UCIN durante un año, excluidos aquellos trasladados a cirugía cardio vascular. Se registraron variables maternas y neonatales, hipertensión arterial materna, vía de parto, edad gestacional, edad, sexo, peso de nacimiento, Apgar, antecedente de maduración pulmonar con corticoides y cateterismo de vasos umbilicales. Se consignó motivo de ingreso a UCIN, medicamen tos y complicaciones durante la hospitalización. La tensión arterial se registró con oscilómetro au tomatizado considerando hipertensión arterial según tablas para edad gestacional. La prevalencia se expresó como porcentaje (intervalo de confianza 95%, IC95%). La estadística descriptiva se presenta como mediana (rango) o frecuencia de presentación (porcentajes) y se buscó asociación con el Test de Wilcoxon, Chi2 o Fisher según correspondiera (p < 0,05). RESULTADOS: Se reclutaron 169 pacientes (60% sexo masculino). Edad gestacional: 38 semanas (rango 26-42), 38% prematuros. Peso 3.000 g (rango 545-4.950), 32% bajo peso. Ocho pacientes presentaron hipertensión arterial (prevalencia 4,7%, IC95% 2,4-9). La presencia de hipertensión arterial se asoció con prematurez (p = 0,0003), bajo peso (p = 0,01), maduración pulmonar con corticoides (p = 0,002), cateterismo umbilical (p = 0,03), uso de ≥ 2 drogas nefrotóxicas (p = 0,02), tratamiento con cafeína (p = 0,0001), injuria renal aguda (p = 0,02) e hipertensión intracraneal (p = 0,04). Solo un paciente requirió medicación antihiper- tensiva y en todos los casos se normalizó durante el seguimiento. CONCLUSIÓN: La prevalencia de hipertensión arterial neonatal fue de 4,7% y en todos los casos se presentó en niños prematuros con factores previamente reconocidos como asociados a esta condición.

INTRODUCTION: The prevalence of neonatal hypertension in neonatal intensive care units (NICU) ranges between 3 and 9%. However, there is no current data on Latin America. Objective: To estimate the prevalence of neonatal hypertension and to assess its association with causes previously related to this condi tion. PATIENTS AND METHOD: cross-sectional study. All patients admitted to the NICU during one year were included, excluding those transferred to the cardiovascular NICU. The following maternal and neonatal variables were registered: maternal arterial hypertension, type of delivery, gestational age, age, sex, birth weight, Apgar score, history of pulmonary maturation with corticosteroids, and umbilical vessel catheterization as well as the reason for admission to the NICU, medications, and complications during hospitalization. Blood pressure was measured with an automated oscillometric device, defining neonatal hypertension according to standards in gestational age. Prevalence was ex pressed as percentage (confidence interval 95%, CI95%). Descriptive data were reported as median (range) and frequency of presentation (percentage). Finally, we used the Wilcoxon, Chi2 o Fisher exact test to identify factors related to NH as applicable (p < 0.05). RESULTS: 169 patients were in cluded (60% males). Gestational age was 38 weeks (range 26-42 weeks), 38% were preterm. Birth weight was 3000 g (range 545-4950 g) and 32% presented low birth weight. Eight patients presented hypertension during hospitalization (4.7% prevalence, CI95% 2.4-9). The presence of hypertension was associated with prematurity (p = 0.0003), low birth weight (p = 0.01), prenatal corticosteroid treatment (p = 0.002), umbilical catheterization (p = 0.03), administration of ὅ 2 nephrotoxic drugs (p = 0.02), caffeine treatment (p = 0.0001), acute kidney injury (p = 0.02), and intracranial hyper tension (p = 0.04). Only one patient required antihypertensive pharmacologic treatment and in all cases, hypertension was resolved during follow-up. CONCLUSION: Prevalence of neonatal hypertension in our NICU was 4.7% and in all cases occurred in preterm newborns with previously recognized factors associated with this condition.

Desarrollo psicomotor a los 18 meses de edad cronológica en recién nacidos de pretérminos extremos: comparación entre edad cronológica y edad corregida / Psychomotor development at 18 months of chronological age in extreme preterm infants: comparison between chronological age and corrected age

En recién nacidos pretérmino extremo (RNPTE) históricamente se ha utilizado la edad corregida (ECo) en la evaluación del desarrollo psicomotor (DSM). Existe controversia en la evidencia respecto de utilidad de esta práctica y riesgo de sobrecorregir. OBJETIVOS: escribir DSM a 18 meses edad cronológica (ECr) en RNPTE, y compararlo con DSM según ECo. OBJETIVO SECUNDARIO: evaluar presencia de patologías o complicaciones de prematurez, en pacientes con retraso en algún área de DSM según ECr. Pacientes y MÉTODO: Estudio de cohorte prospectivo que incluyó RNPTE nacidos en Hospital San José entre Enero y Octubre 2016 con seguimiento en Hospital Roberto del Río. Se aplicó test de Bayley III a 18 meses de ECr y se comparó resultados con ECo. El retraso en algún área según ECr implicó una evaluación clínica neurológica. RESULTADOS: Nacieron 111 pacientes RNPTE entre enero-octubre 2016, 55 participaron del estudio. Según ECr catalogaron 30 pacientes normales y 21 en riesgo. Según ECo, 46 fueron catalogados normales y 5 en riesgo. Los 4 pacientes con retraso según ECr, persistieron en retraso al evaluar según ECo. Evaluación neurológica en pacientes con retraso evidenció trastornos neurológicos que explicaban esta condición. CONCLUSIÓN: Evaluar DSM en RNPTE a 18 meses de ECr permitiría detección de pacientes con riesgo de retraso, a diferencia de lo evaluado por Eco, que es relevante para seguimiento neurológico estrecho. Todos los RNPTE con retraso de DSM en algún área presentan un trastorno neurológico severo que lo explica y no es un desarrollo "madurativo" enlentecido de la prematurez.

In extreme preterm newborns (EPN), corrected age (CoA) has historically been used to evaluate psychomotor development (PSD). There is controversy in the evidence regarding this practice's usefulness and the risk of overcorrection. OBJECTIVE: To describe PSD at 18 months of chronological age (ChrA) in EPN and compare it with CoA. SECONDARY OBJECTIVE: to evaluate the presence of pathologies or complications of prematurity in patients with delay in any area using ChrA. PATIENTS AND METHOD: Cohort prospective study that included EPN patients born in San José Hospital between January and October 2016 with follow-up in Roberto del Río Hospital. Bayley III test was applied at 18 months ChrA and its results were compared with CoA. Delay in any area according to ChrA implied a clinical neurological evaluation. RESULTS: 111 EPN were born in San José Hospital (January-October 2016), 55 participated in the study. According to ChrA, 30 patients were cataloged as normal and 21 at risk. According to CoA, 46 were classified as normal and 5 at risk. The 4 patients with delay according to ChrA persisted in this category when evaluated with CoA. Neurological evaluation in patients with delay evidenced neurological disorders that explained this condition. CONCLUSION: Assessing PSD in EPN at 18 months ChrA allows early detection of patients with risk of developmental delay, regarding the use of CoA, with importance of a neurological follow-up of this group. All patients with delay in PSD had a severe neurological disorder that explained this delay, which was not just a slow "madurative" development of prematurity. .

Diseño y adecuación de una solución gluco-proteica con calcio a las necesidades de recién nacidos pre-término / Design and adequacy of a glycoprotein solution with calcium for the needs of preterm newborn infants

RESUMEN Nuestro objetivo fue diseñar una solución gluco-proteica estandarizada con aporte de calcio y evaluar su adecuación en recién nacidos pre-término en las primeras horas de vida. Método: Se realizó un estudio piloto entre febrero de 2016 y febrero de 2017 en el que se diseñaron dos soluciones gluco-proteicas (vía central y vía periférica) para ser utilizadas en recién nacidos en las primeras horas de vida, que se adaptasen a los requerimientos de todos los recién nacidos en función del ritmo de infusión. Se diseñaron según las recomendaciones existentes y se elaboró el protocolo normalizado de trabajo para describir el proceso de elaboración y los controles de calidad requeridos (visual, gravimétrico y microbiológico). Se monitorizo la respuesta de esta solución gluco-proteica en recién nacidos pre-término. Resultados principales: Se elaboraron 54 lotes de soluciones glucoproteicas por vía central y 52 por vía periférica que se administraron a 47 recién nacidos pre-término sin presentarse complicaciones ni efectos adversos. Conclusiones: la concentración de calcio de la solución gluco-proteica se adapta a las necesidades de la mayoría de los recién nacidos pre-término. La elaboración de soluciones estandarizadas disminuye la carga de trabajo del servicio de farmacia y los costes económicos asociados.

ABSTRACT Our aim was to design a standardized glycoprotein solution with calcium and evaluate adequacy for preterm newborn infants in the first hours of life. Method: Pilot study conducted between February 2016 and February 2017. Two glycoprotein solutions were designed (central and peripheral administration) to be used in newborns in the first hours of life to provide the requirements of all newborns depending on the infusion rhythm. The solutions were designed according to current recommendations, the standard operating procedure was drawn up describing the elaboration process, and the quality controls required (visual, gravimetric and microbiological). The response of this solution in preterm newborns was monitored. Main results: During the study, 54 batches of central glycoprotein solutions and 52 of peripheral glycoprotein solutions were prepared and administered to 47 preterm newborns without complications or side effects in relation to their administration. Conclusions: The concentration of calcium used in the glycoprotein solution formulation was adapted to the requirements of most preterm newborns. The development of standardized solutions reduces the workload of the pharmacy service and the associated economic costs.

Consecuencias perinatales de embarazos logrados mediante reproducción asistida versus embarazos espontáneos / Perinatal results of pregnancy achieved by assisted reproduction therapy versus spontaneous pregnancy

Resumen OBJETIVO: Describir y comparar las consecuencias perinatales de los embarazos logrados por reproducción asistida versus espontáneos. MATERIALES Y MÉTODOS: Estudio observacional, transversal, retrospectivo y analítico. Se incluyeron pacientes que terminaron el embarazo en el Instituto Nacional de Perinatología Isidro Espinosa de los Reyes; se excluyeron las embarazadas con expediente clínico incompleto, terminación del embarazo antes de las 22 semanas. Se analizaron y compararon las principales consecuencias perinatales en ambos tipos de embarazos. El análisis de asociación entre terapia de reproducción asistida y complicaciones perinatales se hizo mediante una regresión logística simple y ajustada por variables confusoras. RESULTADOS: De 448 ciclos iniciados, se analizaron 98 embarazos únicos logrados por reproducción asistida; menor probabilidad para recién nacido pretérmino (p < 0.05) e ingreso a la unidad de cuidados intensivos neonatales (p <0.05) y embarazos múltiples; una probabilidad significativa de amenaza de parto pretérmino versus embarazos espontáneos (p < 0.05). CONCLUSIONES: Se registraron menos complicaciones perinatales en embarazos únicos por reproducción asistida y en embarazos múltiples mayor probabilidad de amenaza de parto pretérmino sin mayor prevalencia de recién nacido pretérmino. La adecuada atención multidisciplinaria previa a la concepción tiene mayor peso en las repercusiones perinatales que la técnica de fertilización asistida por sí misma.

Abstract BACKGROUND: As demand for assisted reproduction techniques has increased, so have concerns about associated perinatal outcomes and whether they are different from spontaneously achieved pregnancies. OBJECTIVE: to describe and compare perinatal outcomes of pregnancies achieved by assisted reproduction versus spontaneous pregnancies. MATERIALS AND METHODS: Observational, cross-sectional, retrospective, analytical study. Pregnancies with resolution within the institute were included; those with an incomplete clinical record, termination of pregnancy before 22 weeks were excluded. The main perinatal results in both types of pregnancies were analyzed and compared. The analysis of the association between assisted reproduction therapy and perinatal complications was made by a simple logistic regression and adjusted for confounding variables. RESULTS: Of 448 cycles initiated, 98 pregnancies achieved by assisted reproduction were analyzed, observing in single pregnancies; lower probability for preterm newborns (p <0.05) and admission to the neonatal intensive care unit (p <0.05) and in multiple pregnancies; a significant probability to present threat of preterm delivery versus spontaneous pregnancies (p <0.05). CONCLUSIONS: There were fewer perinatal complications in single pregnancies for assisted reproduction and in multiple pregnancies a greater probability of threat of preterm delivery without a higher prevalence of preterm newborn, concluding that having an adequate preconceptional multidisciplinary management has a greater weight in perinatal outcomes than Fertilization technique assisted by itself.

El rol de la hipertensión pulmonar en la displasia broncopulmonar / The role of pulmonary hypertension on bronchopulmonary dysplasia

Resumen Hace 50 años Northway describió la Displasia Broncopulmonar (DBP), en nacidos de pretérmino expuestos a ventilación mecánica. Desde entonces, ha aumentado la sobrevida de ellos; sin embar go, ha aparecido una "nueva DBP" y la incidencia de esta no ha disminuido. Una de las caracte rísticas de esta patología es la remodelación vascular anómala, que en su expresión más severa se conoce como Hipertensión Pulmonar (HP); con una incidencia de 17%, que es proporcional a la severidad de la DBP (33% en DBP severa); y como un factor de mortalidad (hasta un 48% mortali dad a 2 años con HP por DBP). Debido a esto resulta importante conocer los métodos diagnósticos y alternativas terapéuticas, tema que se discute en esta revisión. Considerando la alta mortalidad de la asociación HP-DBP, adquiere importancia una estrategia de tamizaje en la población de riesgo. El gold standard para el diagnóstico de HP es el cateterismo cardíaco, sin embargo, el ecocardio-grama transtorácico es una herramienta útil para el tamizaje y diagnóstico de HP en pacientes dis-plásicos, con mediciones cuantitativas y cambios cualitativos en la evaluación diagnóstica. A nivel sanguíneo el péptido natriurético tipo B (BNP), ha mostrado ser útil en el seguimiento; en cuanto a imágenes, la tomografía computarizada se utiliza en casos severos. En cuanto a las terapias, se han propuesto el óxido nítrico inhalado como vasodilatador pulmonar, los inhibidores de la fosfodies-terasas -sildenafil-, los antagonistas de la endotelina -bosentán- y los análogos de prostaciclinas -iloprost-. Aún no se cuenta con evidencia de alta calidad para su uso, dosis y duración del trata miento, pero hay variadas experiencias clínicas. Además, es relevante el cuidado interdisciplinario, destacando optimizar la nutrición. El desafío es lograr una prevención efectiva de la DBP y de sus complicaciones. Un protocolo de tamizaje de HP debe asociarse a una estratificación de riesgo y directrices de tratamiento.

Abstract 50 years ago, Northway described Broncopulmonary Dysplasia (BPD) in preterm infants exposed to mechanical ventilation. Since then, their survival has increased, nevertheless a "new BPD" has appeared and its incidence has not diminished. One of the characteristics of this pathology is the the abnormal vascular remodeling, which in its most severe expression is known as Pulmonary Hyper tension (PH); with an incidence of 17% in patients with BPD, which is proportional to the severity of the disease (33% in severe BPD), and as mortality factor (up to 48% 2-year mortality in PH-BPD). Thereby, it is important to know the diagnostic methods and therapeutic alternatives, topics discus sed in this review. Considering the high mortality in BPD associated PH, screening strategies in at risk population become important. The gold standard is cardiac catheterization; however, transtho-rathic echocardiography is a useful tool for the screening and diagnosis of PH in displasic patients, using cuantitive measures and cualitative changes in the evaluation. Seric type-B natriuretic peptide has shown to be useful for follow-up; regarding images, CT scan is used in severe cases. In terms of therapy; inhaled Nitric Oxide as a pulmonary vasodilator, phosphodiesterase inhibitors -sildenafil-, endotelin antagonists -bosentan-, and prostacyclin analogues -iloprost-, have been proposed. Their use, dosis and treatment lenght still lack support of high quality evidence, but diverse clinical expe riences have been described. Interdisciplinary care is also important, highlighting to optimize nu trition. Therefore, the challenge is to effectively prevent BPD and its complications. A PH screening protocol should be associated with risk stratification and treatment guidelines.

Uso de surfacen en recién nacidos con dificultad respiratoria / Use of surfacen in newborns with respiratory distress

INTRODUCCIÓN: en la última década se han dirigido esfuerzos investigativos a determinar las ventajas del uso profiláctico del surfactante exógeno sobre la terapéutica de rescate del medicamento. Cuba ha desarrollado un surfactante natural heterólogo de origen porcino (Surfacen). OBJETIVOS: evaluar el uso de Surfacen en recién nacidos con síndrome de distrés respiratorio, e identificar la relación entre el momento de la administración del medicamento con la duración de la ventilación mecánica, y el estado de los pacientes al egreso. MÉTODOS: se realizó un estudio descriptivo de corte transversal de los recién nacidos que ingresaron en el servicio de Neonatología del Hospital General Universitario "Dr. Enrique Cabrera", entre enero de 2009 y diciembre de 2011. El universo estuvo constituido por 86 recién nacidos; de ellos, el 87 % con menos de 33 semanas, recibió el medicamento. De igual forma se le administró al 92,2 % de los niños con menos de 1 500 g y más de 750 g, y al 86,8 % con acidosis respiratoria. El 70,9 % de los pacientes tenían un síndrome de distrés respiratorio como diagnóstico inicial, mientras que al egreso el mayor porcentaje correspondió a neonatos con infección neonatal. CONCLUSIONES: se encontró una asociación estadísticamente significativa entre el momento de la administración de Surfacen y el número de días que estuvieron ventilados los neonatos, así como entre la administración de Surfacen posterior a las 2 horas, y la muerte del paciente.

INTRODUCTION: during the last decade, several research studies have devoted to determine the advantages of the prophylactic use of exogenous surfactant over the rescue therapeutic effect of the drug. Cuba has developed a heterologous natural surfactant of swine origin called Surfacen. OBJECTIVEs: to evaluate the use of Surfacen in newborns with respiratory distress syndrome and to identify the association of the time of drug administration with the duration of mechanical ventilation and the patient's condition on discharge from hospital. METHODS: a cross-sectional study of newborns who were admitted to the neonatology service of "Dr. Enrique Cabrera" general university hospital conducted from January 2009 to December 2011. The universe of study was 86 newborns, 87 % of whom were under 33 weeks of age and had received Surfacen. It was also given to 92.2 % of neonates weighing 750 g to 1 500 g and to 86.8 % with respiratory acidosis. In the study group, 70.9 % of patients had respiratory distress syndrome as initial diagnosis whereas on discharge, the newborns with some neonatal infection accounted for the highest percentage. CONCLUSIONS: there was a significant statistical association between the time of Surfacen administration and the duration of the mechanical ventilation, as well as the Surfacen administration two hours after birth and the death of the patient.

Serum phenylalanine in preterm newborns fed different diets of human milk, / Fenilalanina plasmática em recém-nascidos pré-termo alimentados com diferentes dietas de leite humano,

Objective: To evaluate phenylalanine plasma profile in preterm newborns fed different human milk diets. Methods: Twenty-four very-low weight preterm newborns were distributed randomly in three groups with different feeding types: Group I: banked human milk plus 5% commercial fortifier with bovine protein, Group II: banked human milk plus evaporated fortifier derived from modified human milk, Group III: banked human milk plus lyophilized fortifier derived from modified human milk. The newborns received the group diet when full diet was attained at 15 ± 2 days. Plasma amino acid analysis was performedon the first and last day of feeding. Comparison among groups was performed by statistical tests: one way ANOVA with Tukey's post-test using SPSS software, version 20.0 (IBM Corp, NY, USA), considering a significance level of 5%. Results: Phenylalanine levels in the first and second analysis were, respectively, in Group I: 11.9 ± 1.22 and 29.72 ± 0.73; in Group II: 11.72 ± 1.04 and 13.44 ± 0.61; and in Group III: 11.3 ± 1.18 and 15.42 ± 0.83 μmol/L. Conclusion: The observed results demonstrated that human milk with fortifiers derived from human milk acted as a good substratum for preterm infant feeding both in the evaporated or the lyophilized form, without significant increases in plasma phenylalanine levels in comparison to human milk with commercial fortifier. .

Objetivo: Avaliar o perfil plasmático do aminoácido fenilalanina em recém-nascidos pré-termo alimentados com diferentes dietas de leite humano. Métodos: Foram estudados 24 recém-nascidos pré-termo de muito baixo peso, distribuídos em três grupos com diferentes dietas: Grupo I: leite humano de banco com 5% de aditivo comercial para leite humano com proteína de origem bovina (LHB-AC); Grupo II: leite humano de banco com aditivo de leite humano modificado evaporado (LHB-E); e Grupo III: leite humano de banco com aditivo de leite humano modificado liofilizado (LHB-L). Os recém-nascidos receberam a dieta definida para o grupo quando alcançaram dieta plena por 15 ± 2 dias. A análise do aminoácido plasmático foi feita no primeiro e último dias da dieta. A comparação entre os grupos foi realizada por meio do teste ANOVA de uma via, seguido pelo pós-teste de Tukey, utilizando-se o software SPSS (IBM Corp, NY, EUA), versão 20.0, e considerando um nível de significância de 5%. Resultados: As concentrações plasmáticas do aminoácido fenilalanina na primeira e segunda análises foram, respectivamente, no Grupo I (LHB-AC) 11,9±1,22 e 29,72±0,73; no Grupo II (LHB-E) 11,72±1,04 e 13,44±0,61; e no Grupo III 11,3±1,18 e 15,42±0,83 umol/L. Conclusão: Os resultados encontrados demonstram que o leite humano com aditivos do próprio leite humano comportou-se como um bom substrato para alimentação do recém-nascido pré-termo, tanto na forma evaporada como liofilizada, sem levar a aumentos significativos na concentração plasmática de fenilalanina em comparação ao leite humano com aditivo comercial. .

Sensibilidade da seriografia do esôfago, estômago e duodeno para o diagnóstico de doença do refluxo gastroesofágico em recém-nascidos prematuros / Sensitivity of upper gastrointestinal series in the diagnosis of gastroesophageal reflux in premature infants

OBJETIVO: Determinar a sensibilidade da seriografia do esôfago, estômago e duodeno (SEED) para o diagnóstico da doença do refluxo gastroesofágico (DRGE) em recém-nascidos prematuros, tendo como padrão ouro a monitoração prolongada do pH esofágico distal, e descrever a presença de anormalidades anatômicas do tubo digestivo. MATERIAIS E MÉTODOS: Foram incluídos no estudo 41 recém-nascidos, com média de 1.243,9 g, apresentando sinais/sintomas de DRGE e resultados alterados na monitoração do pH (índice de refluxo > 10 por cento). A SEED foi realizada logo que as condições clínicas dos recém-nascidos foram estáveis para a realização dos exames radiológicos. RESULTADOS: A monitoração prolongada do pH e a SEED foram realizadas com 49,8 e 66,8 dias de vida, respectivamente. A sensibilidade da seriografia foi de 56,1 por cento (IC 95 por cento: 39,9-71,2 por cento). Refluxo significativo foi observado em 41,4 por cento dos casos, refluxo médio em 44,8 por cento e refluxo pequeno em 13,8 por cento. A SEED identificou apenas um caso de hérnia de hiato. CONCLUSÃO: A SEED apresentou baixa sensibilidade para a DRGE em prematuros e não se associou com a gravidade do refluxo, na comparação com a monitoração do pH, sendo, entretanto, útil no diagnóstico de alteração anatômica.

OBJECTIVE: To determine the sensitivity of upper gastrointestinal (UGI) series, adopting the 24-h esophageal pH monitoring as the gold standard in the diagnosis of gastroesophageal reflux disease (GERD) in preterm newborns, besides describing the presence of anatomical abnormalities in the digestive tube. MATERIALS AND METHODS: The present study included 41 neonates with average birth weight of 1,243.9 g, presenting signs/symptoms of GERD and abnormal 24-h esophageal pH monitoring (reflux index > 10 percent). The UGI series was performed as soon as the infants' clinical conditions were considered sufficiently stable. RESULTS: The 24-h pH monitoring and UGI series were performed respectively at 49.8 and 66.8 days of life. The UGI series sensitivity was of 56.1 percent (CI 95 percent: 39.9-71.2 percent). The reflux index was significant in 41.4 percent, moderate in 44.8 percent, and mild in 13.8 percent of the cases. Only one case of hiatus hernia was identified by UGI series. CONCLUSION: Upper gastrointestinal series has demonstrated low sensitivity in the diagnosis of GERD in preterm newborns and was not associated with the reflux severity as compared with pH monitoring. However, it is useful in the detection of anatomical abnormalities in the upper gastrointestinal tract.

Lng Injury Induced during Resuscitation of the Preterm Newborns in the Delivery Room / 대한주산의학회잡지

Neonatologists are deeply concerned with the concept of ventilator-induced lung injury (VILI) and they are greatly careful in the neonatal intensive care unit to apply positive-pressure ventilation (PPV) strategies that are gentle to the lungs. To achieve adequate gas exchange after delivery, lung fluid should be cleared and replaced with air, and functional residual capacity (FRC) should be established. However preterm newborns have difficulties establishing FRC and maintaining upper airway patency at birth. Hence majority of preterm newborns need some assistance to initiate breathing after birth and some require extensive resuscitation. PPV is therefore commonly used in the delivery room, however most clinicians including neonatologists or obstetricians appear less aware that the gentle approach as in NICU should be applied to prevent lung injury during the first few minutes of life. PPV may cause lung injury through various mechanisms such as high Vt (tidal volume) and overdistension (volutrauma), repeated alveolar collapse and re-expansion (atelect-trauma), and infection and inflammation (biotrauma), through which leads to epithelial cell injury, leakage of proteinaceous fluid into the lungs, inhibiting surfactant function and interfering lung mechanics, and consequently generating lung injury. In this review, I describe briefly what causes preterm lung injury during PPV based on animal and human researches, and I suggest some strategies to help minimize lung injury during resuscitation of preterm newborns in the delivery room.

Correlation between the neonatal EEG and the neurological examination in the first year of life in infants with bacterial meningitis

OBJECTIVE: To assess the contribution of neonatal electroencephalogram (EEG) and its correlation with the neurological examination at age of 9 months in newborns with bacterial neonatal meningitis. METHOD: Twenty seven infants were studied with positive cerebrospinal fluid (CSF) culture for bacteria. We used the worse EEG result during acute phase of meningitis, and performed neurologic follow-up after discharge from hospital. Background cerebral activity was classified as normal or mildly, moderately, or markedly abnormal. Neurologic examination outcomes was classified normal, mild abnormalities, moderate abnormalities and severe abnormalities. RESULTS: EEG performed in the neonatal period during acute bacterial meningitis predicts adverse outcome early at age of 9 months, and had a significant correlation with cephalic perimeter and active tone alterations. CONCLUSION: Neonatal EEG is useful for predicting abnormal outcomes, especially cephalic perimeter and active tone abnormalities at 9 months of age in infants with bacterial neonatal meningitis.

OBJETIVO: Medir la contribución del electroencefalograma (EEG) neonatal y su correlación con el examen neurológico a la edad de 9 meses en recién nacidos con meningitis neonatal bacteriana. MÉTODO: Se estudió a 27 neonatos con cultivos positivos de líquido cefalorraquídeo a bacterias. Se uso el peor resultado del EEG obtenido durante el periodo agudo de la meningitis. El seguimiento neurológico se efectuó tras el egreso hospitalario. La actividad de fondo del EEG se clasificó en normal y anormal leve, moderada y severa. El examen neurológico se clasificó en normal, y anormal leve moderado y severo. RESULTADOS: El EEG realizado durante el periodo neonatal durante la fase aguda de la meningitis bacteriana predice bien un resultado adverso a la edad de 9 meses, con correlaciones significativas con el perímetro cefálico y con las alteraciones del tono activo. CONCLUSION: El EEG neonatal es útil para predecir anormalidades del neurodesarrollo especialmente en el perímetro cefálico y anormalidades del tono durante el primer año de vida en niños que tuvieron meningitis neonatal bacteriana.