Prematuridad tardía: recomendaciones para el seguimiento a largo plazo / Late preterm newborn: follow-up recommendations

La tasa de prematuridad global, según laOrganización Mundial de la Salud (OMS),muestra un aumento progresivo; su principal componente es el grupo de prematuros tardíos. Este grupo de pacientes suele tener buen peso al nacer, lo que hace que no se perciba muchas veces el riesgo de presentar un espectro de morbilidades del desarrollo, conductuales einmadurez de diferentes órganos y sistemasque impactan en la evolución a corto y largo plazo y aumentan la morbimortalidad. A su vez, tienen un efecto sustancial en los servicios de atención médica. El objetivo de esta publicación es discutir algunosaspectos relacionados con la salud de este grupo de pacientes y sugerir su seguimiento con un enfoque holístico e interdisciplinario.

The WHO states that prematurity rates have increased mainly due to late preterm births. Since these babies are usually born with appropriate weight for their gestational age, their risk for morbidities such as neurodevelopmental delays, behavioral problems and organ systems immaturity are overlooked. Further, these clinical findings have an impact on short and long term outcomes (i.e., morbidities, mortality, and higher healthcare costs). The aim of this publication is to discuss topics related to late-preterm newborns' health, including a holistic and interdisciplinary approach to follow up care.

Impacto da pandemia por COVID-19 na prevalência de casos de prematuridade / Impacto de la pandemia de COVID-19 en la prevalencia de casos de prematuridad / Impact of the COVID-19 pandemic on the prevalence of prematurity cases

Objetivo: analisar a prevalência da prematuridade no contexto da pandemia. Método: estudo transversal, retrospectivo e descritivo, desenvolvido na maternidade de referência do estado do Piauí. Resultados: 46,7% dos prontuários foram do ano de 2020 e 53,3% do ano de 2021. Houve 79% para gravidez única, parto cesáreo 59,1% e líquido amniótico claro 53%. O perfil clínico do RN em relação ao sexo, 47% eram do sexo feminino e 35 % do masculino. Médias: peso de 2462g, perímetro cefálico 34.36cm, torácico 32.58 cm, e comprimento de 48.02 cm. Considerando essa análise no ano de 2020 e 2021 foram contabilizados 21,1% RN com idade gestacional identificando uma prematuridade ao nascer e, 78,9% com idade gestacional dentro dos valores para pós termo. Conclusão: Os índices de prematuridade estão acima do esperado (21,1%), novas pesquisas com amostras mais importantes e melhor delineamento de métodos são necessárias para ampliar o escopo da discussão.(AU)

Objective: to analyze the prevalence of prematurity in the context of the pandemic. Method: a cross-sectional, retrospective and descriptive study, carried out at a reference maternity hospital in the state of Piauí. Results: 46.7% of the medical records were from 2020 and 53.3% from 2021. There were 79% for singleton pregnancy, cesarean delivery 59.1% and clear amniotic fluid 53%. The clinical profile of the NB in relation to sex, 47% were female and 35% male. Averages: weight of 2462g, head circumference 34.36cm, thoracic circumference 32.58cm, and length of 48.02cm. Considering this analysis, in 2020 and 2021, 21.1% of newborns with gestational age were identified as prematurity at birth, and 78.9% with gestational age within the values for post-term. Conclusion: Prematurity rates are higher than expected (21.1%), new research with more important samples and better method design are necessary to broaden the scope of the discussion (AU)

Objetivo: analizar la prevalencia de la prematuridad en el contexto de la pandemia. Método: estudio transversal, retrospectivo y descriptivo, desarrollado en la maternidad de referencia del estado de Piauí. Resultados: El 46,7% de los registros fueron del año 2020 y el 53,3% del año 2021. Hubo un 79% por embarazo único, parto por cesárea un 59,1% y líquido amniótico claro un 53%. El perfil clínico del RN en relación al sexo, el 47% eran del sexo femenino y el 35% del masculino. Promedios: peso de 2462 g, perímetro cefálico 34,36 cm, perímetro torácico 32,58 cm y longitud de 48,02 cm. Considerando este análisis, en 2020 y 2021, el 21,1% de los recién nacidos con edad gestacional fueron identificados como prematuros al nacer, y el 78,9% con edad gestacional dentro de los valores para postérmino. Conclusión: Las tasas de prematuridad son más altas de lo esperado (21,1 %), se necesitan nuevas investigaciones con muestras más importantes y un mejor diseño de métodos para ampliar el alcance de la discusión(AU)

Inmunomodulación con bióticos y alergia alimentaria en pediatría / Immunomodulation properties of biotics and food allergy in pediatrics

El parto prematuro, la cesárea, el uso de antibióticos y la lactancia materna limitada son señalados como responsables en parte del aumento de enfermedades crónicas no transmisibles en niños, como las alergias, principalmente la alergia a la proteína de la leche de vaca (APLV). Quienes desarrollan enfermedades alérgicas muestran diferencias en la composición de su microbiota intestinal durante los primeros meses de vida, en comparación con los que no lo hacen. Las intervenciones tempranas para modular la microbiota intestinal y el sistema inmunológico pueden ser herramientas claves para el abordaje y tratamiento de la APLV. El criterio clínico y el trabajo interdisciplinario de alergólogos, gastroenterólogos, inmunólogos, microbiólogos y nutricionistas le permitirá al pediatra lograr un adecuado diagnóstico y un tratamiento oportuno. En este contexto, el empleo de bióticos (prebióticos, probióticos, sinbióticos y posbióticos) como herramientas nutricionales complementarias tiene un presente con sustento científico y un futuro promisorio para la prevención y tratamiento de estas patologías.

Preterm birth, C-section, antibiotic use, and limited breastfeeding are blamed in part for the increasing incidence of chronic noncommunicable diseases among children, such as allergies, mainly cow's milk protein allergy (CMPA). Those who develop allergic diseases, against those who do not, show differences in the composition of their gut microbiota during the first months of life. Early interventions to modulate the intestinal microbiota and the immune system may be the key tools for the management of CMPA. Clinical judgment and the interdisciplinary work of allergists, gastroenterologists, immunologists, microbiologists, and nutritionists will allow pediatricians to achieve an adequate diagnosis and a timely treatment. In this setting, the use of biotics (prebiotics, probiotics, synbiotics, and postbiotics) as supplementary dietary tools is scientifically supported at present and seems to be very promising for the prevention and treatment of these conditions.

Temporal analysis of the birth and hospitalization of premature children in a Brazilian border town / Análise temporal do nascimento e hospitalização de crianças prematuras em município brasileiro de fronteira

INTRODUCTION: Premature birth is a global public health problem responsible for high rates of infant deaths. OBJECTIVE: To analyze the temporal trend of birth and hospitalization of premature children in a Brazilian border town. METHODS: Crosssectional study encompassing 951 medical records of premature newborns hospitalized receiving intermediate or intensive during 2013-2017 in Foz do Iguaçu, PR, Brazil. The comparisons involved birth and hospitalization variables distributed over the years, and the level of significance was p<0.05. RESULTS: The incidence of premature birth was 10.3% and remained stable in the years studied, however, hospitalization increased from 37.7 to 50.1%. Extreme prematurity (12.2 to 9.5%) and complications (46.0 to 21.6%) showed a reduction, and the use of antibiotics increased (50.0 to 75.2%), with a statistically significant difference (p<0.05). The time of mechanical ventilation (347.2 to 123.9 h) and length of hospital stay (29 to 24.6 days) decreased in the years studied, with no difference in outcome (hospital discharge or death). The most frequent diagnosis at hospitalization was pulmonary disorders. Problems of infectious origin showed a reduction (7.6% to 3.7%), but in 2014 there was an increase in congenital malformations (11.1%) and 2016 perinatal asphyxia (33.7%). CONCLUSION: Although there was a reduction in extreme prematurity, complications, and days of hospitalization, there was an increase in the number of premature newborns hospitalized, showing the need for (re)planning and (re)organization of the care process.

INTRODUÇÃO: O nascimento prematuro é considerado um problema de saúde pública global, por ser responsável por altos índices de mortes infantis. Objetivo: Analisar a tendência temporal de nascimento e da hospitalização de crianças prematuras em município brasileiro de fronteira. MÉTODO: Estudo transversal, com coleta retrospectiva de dados que analisou 951 prontuários de recém-nascidos prematuros, hospitalizados em cuidados intensivos e ou intermediário, no período de 2013 a 2017, em Foz do Iguaçu, PR, Brasil. As comparações realizadas no estudo envolveram variáveis de nascimento e da hospitalização distribuídas por anos, e o nível de significância foi p<0,05. RESULTADOS: A incidência do nascimento prematuro foi de 10,3% e manteve-se estável nos anos estudados, no entanto, a hospitalização mostrou crescimento (37,7%-50,1%). Prematuridade extrema (12,2%-9,5%) e complicações (45,9%­21,6%) apresentaram redução, e o uso de antibióticos (50,0%-75,2%) aumentou, com resultados estatisticamente significantes (p<0,05). O tempo de ventilação mecânica invasiva (347,2­123,9 horas) e tempo de internação (29,0-24,6 dias) diminuíram nos anos estudados, sem diferenças no desfecho alta ou óbito. O diagnóstico na internação de maior ocorrência foi as afecções pulmonares. Problemas de origem infecciosa mostraram redução (7,6%­3,7%), por outro lado, em 2014 houve aumento de malformações congênitas (11,1%) e em 2016 de asfixia perinatal (33,7%). CONCLUSÃO: Embora tenha ocorrido a redução da prematuridade extrema, de complicações e dias de hospitalização, observou-se o aumento do número de recém­nascidos prematuros hospitalizados, mostrando a necessidade do (re)planejamento e da (re)organização do processo assistencial.

Ácido úrico en las gestantes con diagnóstico de drepanocitosis y preeclampsia / Uric acid in pregnant women diagnosed with sickle cell disease and preeclampsia

RESUMEN Introducción: El ácido úrico es el producto final del ciclo de las purinas y es fundamental como marcador de enfermedad renal, la gota y la preeclampsia. Este biomarcador ejerce efectos potenciales en la placenta y el feto de la gestante con drepanocitosis. Objetivo: Describir los efectos potenciales que produce el ácido úrico en las gestantes con drepanocitosis. Métodos: Se revisó literatura en inglés y en español, a través del sitio web PubMed y el motor de búsqueda Google académico, en artículos publicados en los últimos cinco años. Se utilizaron como términos de búsqueda: preeclampsia, ácido úrico y riesgos en las embarazadas con drepanocitosis. Se analizaron los aspectos más relevantes del tema en la bibliografía revisada. Análisis y síntesis de la información: El incremento del ácido úrico añadido a la vasoclusión, la hipoxia y la necrosis tisular a nivel de la placenta son mecanismos invocados en el desarrollo de la preeclampsia y los índices de partos prematuros que presentan. Es de destacar que no tiene una trayectoria uniforme en todas las pacientes, sobre todo se observa una mejor evolución (con menor presencia de estas complicaciones) en aquellas pacientes que muestran genotipo, niveles de hemoglobina fetal y haplotipo de la hemoglobina S más favorable. Conclusiones: El ácido úrico constituye un biomarcador útil y de alarma en el diagnóstico de la preeclampsia, una de las peores complicaciones tanto para la vida materna como para su descendencia, al ser la gestante con drepanocitosis una paciente de muy alto riesgo de parto pretérmino, prematuridad, bajo peso al nacer, nacidos muertos e infarto placentario.

ABSTRACT Introduction: Uric acid is the end product of the purine cycle and is essential as a marker of kidney disease, gout and pre-eclampsia. This biomarker has potential effects on the placenta and fetus of a pregnant woman with sickle cell disease. Objective: To describe the potential effects of uric acid in pregnant women with sickle cell disease. Methods: Literature in English and Spanish was reviewed, through the PubMed website and the academic search engine Google, in articles published in the last five years. The search terms were: pre-eclampsia, uric acid and risks in pregnant women with sickle cell disease. The most relevant aspects of the subject were analyzed in the reviewed bibliography. Analysis and synthesis of information: The increase in uric acid added to vasoocclusion, hypoxia and tissue necrosis at the level of the placenta are mechanisms invoked in the development of pre-eclampsia and the rates of premature births they present. It is noteworthy that it does not have a uniform trajectory in all patients, especially a better evolution is observed, with less presence of these complications in those patients who show a more favorable genotype, fetal hemoglobin levels and hemoglobin S haplotype. Conclusions: Uric acid constitutes a useful and alarm biomarker in the diagnosis of pre-eclampsia, one of the worst complications both for maternal life and for her offspring, as the pregnant woman with sickle cell disease is a patient at a very high risk of preterm delivery. prematurity, low birth weight, stillbirths and placental infarction.

Predictive factors for premature birth and respiratory exacerbation in pregnancies of women with cystic fibrosis

Abstract Objective: In this present study, the authors evaluated the predictive factors for adverse maternal-fetal outcomes in pregnancies of women with cystic fibrosis (CF). Patients were followed up by a referral center for adults in southern Brazil. Methods: This is a retrospective cohort study that used data from electronic medical records regarding pregnancies of women diagnosed with CF. Results: The study included 39 pregnancies related to 20 different women. The main adverse outcomes were high prevalence rates of premature birth (38.5%) and maternal respiratory exacerbation (84.6%). Lower body mass index (BMI) values (< 20.8) and younger ages of CF diagnosis increased the risk of premature birth. The presence of methicillin-resistant and absence of methicillin-sensitive Staphylococcus aureus, as well as a younger age of diagnosis, increased the risk of maternal respiratory exacerbation during pregnancy. Conclusions: Conception in women with CF is often associated with maternal and fetal complications. Continuous monitoring by a multidisciplinary team should emphasize appropriate nutritional status, investigation of bacterial colonization, and immediate attention to respiratory exacerbations.

Abordaje de los probióticos en pediatría: el rol de Lactobacillus rhamnosus GG / Approach to probiotics in pediatrics: the role of Lactobacillus rhamnosus GG

El parto prematuro, las cesáreas, los antibióticos y la lactancia materna limitada contribuyen al aumento de enfermedades crónicas no transmisibles. El objetivo fue realizar una revisión descriptiva del uso de probióticos en pediatría, con foco en la cepa Lactobacillus rhamnosus GG. Ciertos probióticos han demostrado ser eficaces en la diarrea aguda y en la diarrea asociada a antibióticos. L. rhamnosus GG y Saccharomyces boulardii pueden acortar la duración y los síntomas. L. reuteri DSM 17938 y L. rhamnosus GG fueron efectivos para el abordaje del cólico del lactante. El uso de esta cepa en fórmulas infantiles para alergia a las proteínas de leche de vaca promovería la adquisición más temprana de tolerancia. En la prevención de dermatitis atópica, la administración de L. rhamnosus GG durante el embarazo redujo su manifestación en el bebé. El empleo de probióticos como coadyuvantes es una posibilidad para considerar en la práctica pediátrica actual.

Preterm birth, C-sections, antibiotics, and limited breastfeeding contribute to the increase in noncommunicable diseases. Our objective was to perform a descriptive review of probiotic use in pediatrics, focused on Lactobacillus rhamnosus GG. Certain probiotics have demonstrated to be effective in acute diarrhea and antibiotic-associated diarrhea. L. rhamnosus GG and Saccharomyces boulardii may shorten their duration and symptoms. L. reuteri DSM 17938 and L. rhamnosus GG were effective to manage infant colic. The use of this strain in infant formulas for cow's milk protein allergy may promote an earlier tolerance acquisition. In relation to the prevention of atopic dermatitis, the administration of L. rhamnosus GG during pregnancy reduced its development in the infant. The use of probiotics as adjuvants is a possibility to consider in current pediatric practice.

Estado actual y metaanálisis de la relación entre nacimientos prematuros, bajo peso y enfermedades periodontales / Current state and metaanalysis of the relationship between premature births, low weight and periodontal diseases

Introducción: La enfermedad periodontal como factor de riesgo de partos pretérmino y bajo peso al nacer, así como la existencia de modelos matemáticos multifactoriales eficientes para predecir la intensidad de dicho riesgo, abren nuevas perspectivas de prevención para ambas entidades. Objetivo: Determinar el estado actual y metaanálisis de la relación de riesgo entre la enfermedad periodontal, los partos pretérmino y el bajo peso al nacer. Métodos: Se realizó una revisión bibliográfica y un metaanálisis con búsqueda en las bases de datos MEDLINE, PUBMED, SciELO, LILACS, BBO y Cochrane de estudios desde 1996 hasta el 2020, en humanos, en idiomas inglés y/o español. Resultados: Se encontraron 2 323 artículos; fueron excluidos 1 429 por estar duplicados y en otros idiomas, 742 no se correspondían con la temática de la acción de riesgo, 105 pertenecían a otros tipos de estudios, 32 no reunían los criterios de evaluación CASPe y de Newcastle - Otawa y solo 15 conformaron la muestra del metaanálisis. Más de 50 % de dichos artículos muestran asociación de riesgo entre la enfermedad periodontal y los resultados adversos del embarazo, pero en ninguno se realiza predicción del riesgo. Existe gran heterogeneidad en los estudios respecto a las limitaciones metodológicas y la forma de medir la enfermedad periodontal, el resultado del embarazo estudiado y la evaluación de la edad gestacional. Conclusiones: Se evidencia la relación de causalidad entre enfermedades periodontales y partos pretérmino con bajo peso al nacer.

Introduction: The periodontal disease as risk factor of preterm births and low birth weight, as well as the existence of efficient multifactorial mathematical models to predict the intensity of this risk, open new perspectives of prevention for both entities. Objective: To determine the current state and metaanalysis of the risk relationship between the periodontal disease, preterm births and low birth weight. Methods: A literature review and a metaanalysis were carried out with search in databases MEDLINE, PUBMED, SciELO, LILACS, BBO and Cochrane of studies from 1996 to 2020, in humans, in English and/or Spanish languages. Results: Two thousand 323 articles were found; 1 429 were excluded because they were duplicated and in other languages, 742 had nothing to do with the thematic of risk action, 105 belonged to other types of studies, 32 did not meet CASPe and Newcastle - Otawa evaluation criteria and just 15 conformed the sample of metaanalysis. More than 50 % of these articles show risk association between the periodontal disease and the adverse results of pregnancy, but risk prediction is not carried out in none of them. There is a great heterogeneity in the studies regarding methodological limitations and form of measuring the periodontal disease, result of the studied pregnancy and evaluation of the gestational age. Conclusions: The relationship of causality between periodontal diseases and preterm births with low birth weight is evidenced.

El prematuro tardío, ¿qué sabemos desde el punto de vista perinatal? / The late premature, what do we know from the perinatal point of view?

Resumen El parto prematuro es la principal causa de morbimortalidad neonatal en Chile. Los prematuros tardíos, definidos como nacimientos entre 34 semanas con 0 días (34+0) y 36 semanas con 6 días (36+6) de gestación, representan el 70-80% de los prematuros y se asocian a baja morbilidad y excepcional mortalidad si se comparan con partos bajo 34 semanas, pero significativamente mayor al compararlos con partos de término. Los prematuros tardíos son el resultado de diversas condiciones obstétricas, tales como síndromes hipertensivos del embarazo, rotura prematura de membranas, colestasia intrahepática del embarazo y comorbilidad médica. El propósito de esta revisión es actualizar la información asociada a los prematuros tardíos y dar una visión de las tendencias en el uso de corticoides y el manejo expectante de la rotura prematura de membranas con el objetivo de disminuir las complicaciones en este grupo de prematuros.

Abstract Preterm delivery is the most important cause of neonatal morbidity and mortality in Chile. Late preterm, defined as deliveries between 34 +0 and 36+6-weeks accounts for 70-80% of preterm and is associated with non-severe morbidity and extremely low mortality when compared with deliveries below 34 weeks but significantly high when compared with full term babies. Late preterm deliveries are a result of several obstetric conditions, such a hypertensive disorder, premature rupture of membranes, intrahepatic cholestasis, and maternal medical comorbidities. The purpose of this review is to update the information associated with the risks of late preterm and to guide in the new trends in the application of steroid and expectant management for premature rupture of membranes in order to reduce the frequency of late preterm.

Retrospective analysis of 35 burn patients in different stages of pregnancy / 中华烧伤杂志

Objective: To summarize the clinical outcomes of burn patients in different stages of pregnancy and explore a rational therapeutic scheme for burns during pregnancy. Methods: A retrospective observational study was conducted. From June 2010 to June 2020, 21 patients who met the inclusion criteria were admitted to the Department of Burns of Wuhan Third Hospital and 14 patients who met the inclusion criteria were admitted to the Department of Burns of the First Affiliated Hospital of Nanchang University. Based on the pregnancy period when patients suffered burns, the 35 patients were divided into early pregnancy group with 18 patients (aged (26±4) years, with 8 (4, 11) weeks of gestation), middle pregnancy group with 10 patients (aged (26±3) years, with 21 (14, 27) weeks of gestation), and late pregnancy group with 7 patients (aged (30±5) years, with 32 (29, 35) weeks of gestation). All the patients received treatment including fluid resuscitation, anti-infection, wound treatment, and multidisciplinary comprehensive managements. The burn-related complications during the treatment, maternal outcomes, fetal outcomes, fetal delivery mode, gestational weeks at delivery, and newborn weight of patients in the 3 groups were recorded. Data were statistically analyzed with one-way analysis of variance, Kruskal-Wallis test, and Fisher's exact probability test. Results: During the treatment, there were 4, 4, and 2 patients who suffered wound infections and 1, 3, and 2 patients who developed shock symptoms, respectively, in early pregnancy group, middle pregnancy group, and late pregnancy group. There were no statistically significant differences in them among the 3 groups (P>0.05). One patient in late pregnancy group developed into multiple organ dysfunction syndrome after debridement. At last, all the pregnant women survived, and no statistically significant difference existed among the 3 groups (P>0.05). In early pregnancy group, middle pregnancy group, and late pregnancy group, the survived fetus cases were 9, 8, and 6, respectively, and the differences between them were not statistically significant (P>0.05). Variables including stillbirth and full-term birth were close in patients in the 3 groups (P>0.05), while the preterm birth and miscarriage in patients in the 3 groups were statistically different (P<0.05 or P<0.01), with the early pregnancy group having the most miscarriage cases and the fewest preterm birth cases. There were no statistically significant differences in fetal delivery mode, gestational weeks at delivery, and newborn weight among the patients with survived fetus in 3 groups (P>0.05). Conclusions: For patients suffering burns during early, middle, and late pregnancy, superior rates of maternal and fetal survival can be achieved after timely and adequate treatments including fluid resuscitation, anti-infection, wound treatment, and multidisciplinary comprehensive managements.

Impact of probiotics on the lung development of Bama minipig after premature birth / 中华儿科杂志

Objectives: To examine the impact of probiotics on the lung development of preterm birth of Bama pig. Methods: From April 2020 to October 2021, this animal experimental research was performed by setting up preterm (birth at gestation 104 d), full-term (birth at gestation 113 d), preterm with probiotics (birth at gestation 104 d treated with probiotics given at 3 d after birth), and full-term with probiotics (birth at gestation 113 d treated with probiotics given at 3 d after birth) groups and using the preterm Bama minipig model, the body weights were recorded and lung, ileum, and intestinal content samples were collected at birth, 4 days, 9 days, and 21 days after births of the piglets in preterm and full-term groups, the same samples were collected on 9 days after births of the piglets in preterm with probiotics and full-term with probiotics groups. The body weight and radial alveolar counts (RAC) were compared to evaluate the lung development of the piglets. The lengths of ileal villus were compared to evaluate the development of ileum. The composition structures of bacteria in ileum were analyzed by 16 S rRNA sequencing. The statistical analyses between different groups were performed by t test. Results: There were totally 30 piglets (16 female piglets and 14 male piglets) involving 12 piglets in preterm and full-term groups respectively and 3 piglets in preterm with probiotics and full-term with probiotics groups respectively. The body weights of the piglets in preterm group were lower than those in full-term group at 4, 9 and 21 d after birth ((507±27) vs. (694±56) g, (620±35) vs. (1 092±154) g, (1 660±210) vs. (2 960±418) g,t=2.96, 2.99, 2.78, all P<0.05). The alveolarization of the preterm piglets at 9 days after birth was significantly lower than that of the full-term piglets at the equivalent time point (4.00±0.29 vs. 6.11±0.35, t=4.64, P<0.01). The bacteria genus with the highest abundance in ileum were all different between the preterm and the full-term groups at 4, 9 and 21 d after birth (4 d Escherichia-Shigella (26.63%) and Enterococcus (30.48%) respectively;9 d Turicibacter (35.94%) and Lactobacillus (27.33%) respectively;21 d Escherichia-Shigella (28.02%) and Lactobacillus (46.29%) respectively). The heights of ileal villus of the preterm piglets at 9 d after birth were significantly lower than those of the full-term minipigs at the equivalent time point ((297±21) vs. (411±32) μm, t=3.01, P=0.007).There were both no differences in the body weight and alveolarization ((692±36) vs. (767±67) g, 5.44±0.34 vs. 5.89±0.26, t=0.74, 1.04, both P>0.05) between the piglets in preterm with probiotics group and those in full-term with probiotics group. Turicibacter was the dominant genus in the piglets of both preterm with probiotics and the full-term with probiotics groups. The heights of ileal villus of the piglets in preterm with probiotics group were significantly longer that those of the piglets in preterm group ((371±13) vs. (297±21) μm, t=3.04, P=0.006), and were both not significantly different from those of the piglets in full-term with probiotics group and full-term group ((371±13) vs. (338±12) and (411±32) μm, t=1.90, 1.15, both P>0.05). Conclusions: Premature birth could impact the lung alveolarization of piglets. The probiotics could improve the lung alveolarization of preterm minipigs by promoting the development of ileum.

Burden of disease and risk factors among children under 5 years in China from 1990 to 2019: a perspective of international comparison / 中华预防医学杂志

Based on the Global Burden of Disease study 2019, the standardized mortality rate and disability-adjusted life years (DALYs) rate of children under 5 years old were selected as evaluation indicators to compare and analyze the current situation and differences of disease burden of children under 5 years old between China and other regions from 1990 to 2019. The change trend and difference of disease burden of children under 5 years old in China were analyzed by sexes. From 1990 to 2019, the all-cause standardized mortality rate of children under 5 years old in China decreased from 1 153.81/100 000 to 160.39/100 000, and the all-cause standardized DALY rate decreased from 104 426.40/100 000 to 16 479.01/100 000. In 2019, neonatal preterm birth, congenital heart anomalies and lower respiratory infections ranked the top three disease burden of children under 5 years old in China. Except that the disease burden of neonatal preterm birth was lower than that in North America, they were much higher than that in Western Europe and North America in the same period. The burden of unintentional injury diseases, including pulmonary aspiration and foreign body in airway and drowning, was higher than that in Western Europe and North America. The standardized mortality and DALY rate of the top ten diseases and injuries in boys and girls under 5 years old in China showed a downward trend (P<0.05), and most of them were higher in boys than girls (P<0.05). From 1990 to 2019, the disease burden of children under 5 years old in China decreased significantly. However, compared other regions, it is still necessary to strengthen the prevention and control of neonatal premature birth, birth defects and unintentional injuries, and take different sex-specific interventions to improve the overall health of children.

Analysis of child mortality under 5 years old in Liuyang City from 2013 to 2020 / 中南大学学报(医学版)

OBJECTIVES@#To provide reference basis for reducing the mortality for children under 5 years old and promote the healthy development, the mortality for children under 5 years old and the main causes for death in Liuyang City from 2013 to 2020 are analyzed.@*METHODS@#The data of 725 cases of death for children under 5 years old in Liuyang City from 2013 to 2020 were collected.The causes and difference of death among the children were analyzed retrospectively by descriptive statistic methods.@*RESULTS@#There were a total of 144 516 live births in Liuyang City from 2013 to 2020. The mortality for children under 5 years old was 5.01‰, for infants was 3.39‰, and for newborns was 1.63‰. The male child mortality was 5.28‰, and the female child mortality rate was 4.72‰, with significant difference (P>0.05). The mortality for children under 5 years old was seasonal fluctuation, without significant difference among seasons (P>0.05). For the past 5 years, the top 3 causes for death among children under 5 years old were preterm birth and low birth weight, congenital heart disease, and pneumonia. Before death, 341 cases (47.04%) were treated in provincial hospitals, 198 cases (27.31%) in county-level hospitals, 56 cases (7.72%) in village-level hospitals, and 130 cases (17.93%) were not treated.@*CONCLUSIONS@#The mortality for children under 5 years old in Liuyang City is gradually reduced in the past 5 years. The main causes for death are premature birth and low birth weight, congenital heart disease and pneumonia. We should develop healthy education, improve the rate of prenatal diagnosis, promote the construction of obstetrics and paediatrics, and fundamentally reduce the mortality for children under 5 years old.

An EHG-based Preterm Delivery Prediction Algorithm via Convolution Neural Network / 中国医疗器械杂志

Premature delivery is one of the direct factors that affect the early development and safety of infants. Its direct clinical manifestation is the change of uterine contraction intensity and frequency. Uterine Electrohysterography(EHG) signal collected from the abdomen of pregnant women can accurately and effectively reflect the uterine contraction, which has higher clinical application value than invasive monitoring technology such as intrauterine pressure catheter. Therefore, the research of fetal preterm birth recognition algorithm based on EHG is particularly important for perinatal fetal monitoring. We proposed a convolution neural network(CNN) based on EHG fetal preterm birth recognition algorithm, and a deep CNN model was constructed by combining the Gramian angular difference field(GADF) with the transfer learning technology. The structure of the model was optimized using the clinical measured term-preterm EHG database. The classification accuracy of 94.38% and F1 value of 97.11% were achieved. The experimental results showed that the model constructed in this paper has a certain auxiliary diagnostic value for clinical prediction of premature delivery.

Characteristics of amino acid metabolism in preterm infants in Guangxi, China / 中国当代儿科杂志

OBJECTIVES@#To study the characteristics of amino acid metabolism in preterm infants in Guangxi, China.@*METHODS@#A retrospective analysis was performed on the medical data of 30 757 neonates who underwent the screening for inherited metabolic diseases and had negative results in Guangxi Neonatal Disease Screening Center from 2018 to 2020. Among these neonates, there were 28 611 normal full-term infants (control group) and 2 146 preterm infants (preterm birth group). According to gestational age, the preterm infants were further divided into four groups: very preterm (n=209), moderately preterm (n=307), and late preterm group (n=1 630). According to birth weight, they were divided into three groups: very low birth weight group (n=161), low birth weight group (n=1 085), and normal birth weight group (n=900). According to blood collection time, they were divided into three groups: 3-7 days group (n=1 664), 8-14 days group (n=314) and 15-28 days group (n=168). Tandem mass spectrometry was performed to measure the levels of 11 amino acids in dried blood spots, which were then compared between groups.@*RESULTS@#After adjustment for confounding factors, there were significant differences in the levels of 11 amino acids among different gestational age groups (P<0.05), and significant differences were observed in the levels of the 11 amino acids between the control group and the various preterm groups (except for citrulline and methionine in the late preterm group). There were significant differences in the levels of 11 amino acids among different birth weight groups (P<0.05). Except for ornithine, there were significant differences in the levels of other amino acids among the different blood collection time groups (P<0.05).@*CONCLUSIONS@#Gestational age, birth weight and blood collection time all affect amino acid metabolism in preterm infants in Guangxi, China. This provides a basis for the laboratory to establish the reference standard and clinical interpretation of blood amino acid levels in preterm infants, and to improve the nutritional metabolism of preterm infants.

Obstructive Sleep Apnea in Pregnancy / 中国医学科学院学报

The incidence of obstructive sleep apnea (OSA) is higher in pregnancy than in non-pregnancy,and obesity is a major risk factor.OSA in pregnancy can lead to multiple organ dysfunction and is associated with hypertensive disorders in pregnancy,gestational diabetes mellitus,premature birth,and fetal growth restriction. Therefore,early screening and diagnosis are essential for the prevention and treatment of OSA in pregnancy.

Association of Dietary Diversity with Growth and Development of Children in Multi-ethnic Rural Areas of Sichuan Province / 中国医学科学院学报

Objective To understand the growth and dietary diversity status of children in multi-ethnic areas of Sichuan province,and to explore the associations of dietary diversity with growth and development indicators. Methods Children of 18-36 months old and their primary caregivers were selected with multi-stage cluster random sampling method from rural areas of Han,Tibetan,and Yi ethnic groups in Sichuan province. The sociodemographic information of children and their caregivers was collected using self-designed questionnaire.The dietary diversity score(DDS)was calculated according to the criteria in the Guidelines for Measuring Household and Individual Dietary Diversity released by the Food and Agriculture Organization of the United Nations.The body height(length)and body weight of each child were measured by standard equipment for anthropological measurement,and the height for age Z score(HAZ),weight for age Z score(WAZ),and weight for height Z score(WHZ) were calculated.Multivariate linear regression was performed to analyze the relationship between dietary diversity and growth indicators of children. Results A total of 1092 children were enrolled in this study,and the prevalence of stunting(HAZ<-2),underweight(WAZ<-2),and wasting(WHZ<-2)was 21.1%,4.9%,and 2.5%,respectively.The children had the mean DDS of 4.8±1.7,and 45.3% of children had poor dietary diversity(DDS≤4).The children of Han ethnic group(5.8±1.4)had higher DDS than those of Tibetan ethnic group(4.9±1.6)and Yi ethnic group(3.9±1.6)(P<0.001).The results of multivariate linear regression indicated that DDS was positively correlated with HAZ(β=0.206,95%CI=0.158-0.254,P<0.001)after adjustment of sex,age,birth weight,preterm birth,and parental body height.After further adjustment of family fixed assets,ethnic group,caregiver's type,and caregiver's education background,the correlation between DDS and HAZ remained significant(β=0.077,95%CI=0.026-0.128, P=0.003). Conclusions The children in the multi-ethnic rural areas of Sichuan province showed troublesome growth and development status and low dietary diversity,which were conspicuously different between ethnic groups,especially in the rural areas of Yi ethnic group.The dietary diversity was positively associated with HAZ.It is recommended to carry out nutrition and health education according to the local dietary characteristics and thus improve the growth and development of children in multi-ethnic rural areas in Sichuan.

Recurrent preterm birth: data from the study "Birth in Brazil" / Prematuridade recorrente: dados do estudo "Nascer no Brasil"

ABSTRACT OBJECTIVE Describe and estimate the rate of recurrent preterm birth in Brazil according to the type of delivery, weighted by associated factors. METHODS We obtained data from the national hospital-based study "Birth in Brazil", conducted in 2011 and 2012, from interviews with 23,894 women. Initially, we used the chi-square test to verify the differences between newborns according to previous prematurity and type of recurrent prematurity. Sequentially, we applied the propensity score method to balance the groups according to the following covariates: maternal age, socio-economic status, smoking during pregnancy, parity, previous cesarean section, previous stillbirth or neonatal death, chronic hypertension and chronic diabetes. Finally, we performed multiple logistic regression to estimate the recorrence. RESULTS We analyzed 6,701 newborns. The rate of recurrence was 42.0%, considering all women with previous prematurity. Among the recurrent premature births, 62.2% were spontaneous and 37.8% were provider-initiated. After weighting by propensity score, we found that women with prematurity have 3.89 times the chance of having spontaneous recurrent preterm birth (ORaj = 3.89; 95%CI 3.01-5.03) and 3.47 times the chance of having provider-initiated recurrent preterm birth (ORaj = 3.47; 95%CI 2.59-4.66), compared to women who had full-term newborns. CONCLUSIONS Previous prematurity showed to be a strong predictor for its recurrence. Thus, expanding and improving the monitoring and management of pregnant women who had occurrence of prematurity strongly influence the reduction of rates and, consequently, the reduction of infant morbidity and mortality risks in the country.

RESUMO OBJETIVO Descrever e estimar a taxa de prematuridade recorrente no Brasil segundo o tipo de parto, ponderado pelos fatores associados. MÉTODOS Os dados foram obtidos do estudo nacional de base hospitalar "Nascer no Brasil", realizado em 2011 e 2012, a partir de entrevistas com 23.894 mulheres. Inicialmente foi utilizado o teste qui-quadrado para verificar as diferenças entre os recém-nascidos, segundo a prematuridade prévia e o tipo de prematuridade recorrente. Sequencialmente, aplicou-se o método de ponderação pelo escore de propensão para equilibrar os grupos de acordo com as seguintes covariáveis: idade materna, classificação socioeconômica, tabagismo durante a gravidez, paridade, cesárea anterior, natimorto ou óbito neonatal anterior, hipertensão crônica e diabetes crônica. Por último, foi realizada regressão logística múltipla para estimar a prematuridade recorrente. RESULTADOS Foram analisados 6.701 recém-nascidos. A taxa de prematuridade recorrente foi de 42,0%, considerando todas as mulheres com prematuridade prévia. Dentre os prematuros recorrentes, 62,2% foram espontâneos e 37,8% ocorreram por intervenção-obstétrica. Após a ponderação pelo escore de propensão, verificou-se que mulheres com prematuridade prévia têm 3,89 vezes a chance de terem prematuridade recorrente espontânea (ORaj = 3,89; IC95% 3,01-5,03) e 3,47 vezes a chance de terem prematuridade recorrente por intervenção obstétrica (ORaj = 3,47; IC95% 2,59-4,66), em comparação às mulheres que tiveram recém-nascidos termo completo. CONCLUSÕES A prematuridade prévia revelou-se um forte preditor para sua recorrência. Assim, ampliar e melhorar o monitoramento e manejo de gestantes com história de prematuridade impacta fortemente na redução das taxas e, consequentemente, na redução dos riscos de morbimortalidade infantil no país.

Adolescentes grávidas que experienciaram o nascimento prematuro: percepções acerca do cuidado pré-natal / Adolescentes embarazadas que experimentaron un nacimiento prematuro: percepciones acerca del cuidado prenatal / Pregnant adolescents who experienced premature birth: perceptions about prenatal care

Resumo Objetivo conhecer os significados atribuídos ao pré-natal por adolescentes que pariram prematuramente e seus alcances ao parto e nascimento. Método estudo qualitativo que adotou o Interacionismo Simbólico e a Análise de Conteúdo Temática como referenciais teóricos e metodológicos e a entrevista aberta como instrumento de coleta de dados. Onze adolescentes residentes em um município do interior paulista integraram o estudo ao longo do ano de 2018. Resultados as adolescentes apontaram relações limitadas com os profissionais com obstáculos ao desenvolvimento da autonomia para as questões da gestação, parto e nascimento, assim como para o estabelecimento do apoio social. Emergiram três categorias temáticas: 'Início do pré-natal: reflexões e projeções futuras'; 'Insuficiências na atenção pré-natal' e '(Des) acolhimento no parto e nascimento'. Conclusão conhecer os significados atribuídos ao pré-natal por adolescentes que pariram prematuramente favoreceu apontamentos ao atitudinal do profissional em relação à consideração da adolescente enquanto indivíduo que direciona o cuidado por meio de seu lugar de fala e no exercício dos seus direitos no sentido de promover uma experiência positiva e qualificar o pré-natal.

Resumen Objetivo conocer los significados atribuidos a la atención prenatal por las adolescentes que dieron a luz prematuramente y su alcance durante el parto y el nacimiento. Método estudio cualitativo que adoptó el Interaccionismo Simbólico y el Análisis de Contenido Temático como referenciales teóricos y metodológicos y la entrevista abierta como instrumento de recolección de datos. Once adolescentes residentes en una ciudad del interior de São Paulo participaron del estudio a lo largo de 2018. Resultados las adolescentes señalaron relaciones limitadas con profesionales con obstáculos al desarrollo de la autonomía para los temas de embarazo, parto y nacimiento, así como para el establecimiento de apoyo social. Surgieron tres categorías temáticas: 'Inicio de la atención prenatal: reflexiones y proyecciones de futuro'; 'Insuficiencias en la atención prenatal' y '(Des) acogida en el parto y el nacimiento'. Conclusión conocer los significados atribuidos a la atención prenatal por las adolescentes que dieron a luz prematuramente favoreció la actitud del profesional de considerar a la adolescente como un individuo que dirige el cuidado a través de su lugar de expresión y en el ejercicio de sus derechos para promover una experiencia positiva y calificar el prenatal.

Abstract Objective to know the meanings attributed to prenatal care by adolescents who gave birth prematurely and their reaches to labor and birth. Method qualitative study that adopted the Symbolic Interactionism and Thematic Content Analysis as theoretical and methodological references and the open interview as a data collection tool. Eleven adolescents living in a municipality in the interior of São Paulo integrated the study throughout the year 2018. Results the adolescents pointed out limited relationships with professionals with obstacles to the development of autonomy for the issues of pregnancy, delivery and birth, as well as for the establishment of social support. Three thematic categories emerged: 'Beginning of prenatal care: reflections and future projections'; 'Insufficiencies in prenatal care' and '(un) welcoming in labor and birth'. Conclusion knowing the meanings attributed to prenatal care by adolescents who gave birth prematurely, favored points to the attitudinal of the professional regarding the consideration of the adolescent as an individual who directs care through her place of speech and in the exercise of her rights in order to promote a positive experience and qualify prenatal care.