Bronchopulmonary dysplasia: temporal trend from 2010 to 2019 in the Brazilian Network on Neonatal Research.

Objective: To evaluate the temporal trend of bronchopulmonary dysplasia (BPD) in preterm infants who survived to at least 36 weeks' post-menstrual age (PMA) and BPD or death at 36 weeks' PMA, and to analyse variables associated with both outcomes.

Design: Retrospective cohort with data retrieved from an ongoing national registry.

Setting: 19 Brazilian university public hospitals.

Oxidative status in colostrum and mature breast milk related to gestational age and fetal growth.

Introduction: The effect of gestational age and fetal growth on the oxidant/antioxidant status of breast milk is poorly understood.

Objective: To evaluate the oxidative stress biomarkers in colostrum and mature milk according to gestational age and fetal growth.

Method: A longitudinal study with mothers of premature and term infants, born in a tertiary referral hospital between 2014-2018.

Use of laryngeal mask for neonatal resuscitation in Brazil: A national survey.

Background: The International Liaison Committee on Resuscitation suggests using the laryngeal mask airway (LMA) as an alternative to the face mask for performing positive pressure ventilation (PPV) in the delivery room in newborns ≥34 weeks. Because not much is known about the health professionals' familiarity in using LMA in Brazil, this study aimed to describe the health professionals' knowledge and practice of using LMA, who provide neonatal care in the country.

Methods: An online questionnaire containing 29 questions was sent to multi-healthcare professionals from different regions in the country through email and social media groups (WhatsApp®, Instagram®, Facebook®, LinkedIn®).

Impact of early-onset preeclampsia on feeding tolerance and growth of very low birth weight infants during hospitalization.

Objective: The provision of adequate enteral nutrition to preterm infants is a great challenge, and preeclampsia (PE) may have a detrimental effect on the safety of nutrition supply. This study aims to investigate the influence of early-onset PE on preterm infants' enteral feeding tolerance and growth during hospitalization.

Methods: This is a prospective study with 55 preterm infants <34 weeks born to PE mothers matched by gestational age with 55 preterm infants born to normotensive mothers from 2013 to 2016.

Temporal trends in intraventricular hemorrhage in preterm infants: A Brazilian multicenter cohort.

Background: Intraventricular hemorrhage (IVH) is a serious problem in preterm infants. Brazilian national data are unknown.

Objective: To evaluate the incidence and temporal trend of IVH in very low birth weight (VLBW) preterm infants of 18 centers of the Brazilian Network on Neonatal Research.

Evaluation of the effectiveness of antenatal corticoid in preterm twin and single pregnancies: a multicenter cohort study.

Background: The effects of antenatal corticosteroids (ANSs) on twins are not well established.

Objective: To determine the impact of ANS use according to the number of fetuses.

Methods: Retrospective cohort study of newborns between 23 and 33 weeks of gestational age, birth weight from 400 to 1499 g, without malformations, delivered at 20 public university hospitals from 2010 to 2014.

Risk Perception and Decision Making about Early-Onset Sepsis among Neonatologists: A National Survey.

Objective: Many newborns are investigated and empirically treated for suspected early-onset sepsis (EOS). This study aimed to describe neonatologists' self-identified risk thresholds for investigating and treating EOS and assess the consistency of these thresholds with clinical decisions.

Study Design: Voluntary online survey, available in two randomized versions, sent to neonatologists from 20 centers of the Brazilian Network on Neonatal Research.

The effect of early-onset preeclampsia on the intestinal blood flow of preterm infants.

Background: Preeclampsia is associated with important vascular maternal changes. However, its repercussions on newborns' circulation have hardly been reported.

Objective: To investigate whether early-onset preeclampsia is associated with altered blood flow of the superior mesenteric artery (SMA) in preterm infants.

EVALUATION OF USABILITY OF A NEONATAL HEALTH INFORMATION SYSTEM ACCORDING TO THE USER'S PERCEPTION.

Objective: To measure the level of satisfaction regarding the usability of a neonatal health information system and identify if demographic factors can influence the usability of a health information system.

Methods: A cross-sectional, exploratory study was carried out with a convenience sample of 50 users of the Brazilian Neonatal Research Network. The instrument chosen for the usability evaluation was the System Usability Scale between February and March 2017.

COLOSTRUM FAT AND ENERGY CONTENT: EFFECT OF GESTATIONAL AGE AND FETAL GROWTH.

Objective: To determine whether fat content and energy value change in colostrum according to gestational age and fetal growth.

Methods: Cross-sectional study with mothers of preterm and term infants born in a tertiary center in 2015-2016. Inclusion criteria: single pregnancy, absence of diabetes, chorioamnionitis and mastitis, no use of illicit drugs or alcohol, without fetal congenital malformation or infection.

Effect of preeclampsia on human milk cytokine levels.

Introduction: Preeclampsia (PE) is a systemic inflammatory disease, and its effect on human milk immune components is poorly understood.

Objective: To investigate whether PE affects human milk cytokine levels.

Methods: This was a prospective observational study involving mothers diagnosed with PE and with singleton pregnancy with no fetal malformation.

Early Empiric Antibiotic Use Is Associated With Delayed Feeding Tolerance in Preterm Infants: A Retrospective Analysis.

The causative factors of neonatal feeding intolerance are poorly understood, but potentially related to clinical practices such as empiric antibiotic usage. The objective of this study was to evaluate whether early empiric antibiotic exposure negatively affects preterm infants' enteral feeding tolerance. Data from infants without risk factors for sepsis, 500 to 1499 g birth weight and 24 to 34 weeks gestational age were analyzed.

Painful procedures and analgesia in the NICU: what has changed in the medical perception and practice in a ten-year period?

Objective: To compare the use of analgesia versus neonatologists' perception regarding analgesic use in painful procedures in the years 2001, 2006, and 2011.

Methods: This was a prospective cohort study of all newborns admitted to four university neonatal intensive care units during one month in 2001, 2006, and 2011. The frequency of analgesic prescription for painful procedures was evaluated.

Factors associated with red blood cell transfusions in very-low-birth-weight preterm infants in Brazilian neonatal units.

Background: Preterm infants in neonatal intensive care units frequently receive red blood cells (RBC) transfusions due to the anemia of prematurity. A number of variables related to gestational age, severity of illness and transfusion practices adopted in the neonatal unit where the neonate was born may contribute to the prescription of RBC transfusions. This study aimed to analyse the frequency and factors associated with RBC transfusions in very-low-birth-weight preterm infants.

There is no difference in nitric oxide metabolites and neonatal outcome between premature infants born to pre-eclamptic and those born to normotensive women.

Background: The pathophysiology of pre-eclampsia (PE) is complex, and nitric oxide (NO) may be a factor. The neonatal outcome in pregnancies complicated by PE is controversial, and the PE/NO/neonatal diseases relationship has not been well established.

Aims: To measure nitrate and nitrite levels in the placenta, umbilical cord blood, blood and urine of preterm neonates born to pre-eclamptic and normotensive women and to investigate the relationship between placental, fetal and neonatal NO metabolites and neonatal outcome.

Late-onset sepsis in very low birth weight infants: a Brazilian Neonatal Research Network Study.

Background: Late-onset sepsis (LOS) is an important cause of morbidity and mortality in very low birth weight (VLBW) infants.

Aim: To determine the incidence, risk factors and etiology of LOS.

Methods: LOS was investigated in a multicenter prospective cohort of infants at eight public university neonatal intensive care units (NICUs).

Diagnostic accuracy of semi-quantitative and quantitative culture techniques for the diagnosis of catheter-related infections in newborns and molecular typing of isolated microorganisms.

Background: Catheter-related bloodstream infections (CR-BSIs) have become the most common cause of healthcare-associated bloodstream infections in neonatal intensive care units (ICUs). Microbiological evidence implicating catheters as the source of bloodstream infection is necessary to establish the diagnosis of CR-BSIs. Semi-quantitative culture is used to determine the presence of microorganisms on the external catheter surface, whereas quantitative culture also isolates microorganisms present inside the catheter.

Cord blood cytokine levels in focal early-onset neonatal infection after preterm premature rupture of membranes.

This study aimed to evaluate the levels of pro- and anti-inflammatory cytokines in umbilical cord blood of preterm neonates who developed focal early-onset infection (EOI) after preterm premature rupture of membranes (PPROM). This is a prospective study conducted on 46 preterm infants from mothers with PPROM. The cytokines were measure by flow cytometry.

Hypothermia and early neonatal mortality in preterm infants.

Objective: To evaluate intervention practices associated with hypothermia at both 5 minutes after birth and at neonatal intensive care unit (NICU) admission and to determine whether hypothermia at NICU admission is associated with early neonatal death in preterm infants.

Study Design: This prospective cohort included 1764 inborn neonates of 22-33 weeks without malformations admitted to 9 university NICUs from August 2010 through April 2012. All centers followed neonatal International Liaison Committee on Resuscitation recommendations for the stabilization and resuscitation in the delivery room (DR).

[Changes of blood flow in the umbilical artery in hypertensive pregnancy and the implications in the neonatal outcomes].

Purpose: To evaluate the anthropometric characteristics of morbidity and mortality of premature newborns (NB) of hypertensive mothers according to the presence or absence of flow (DZ) or reverse (DR) diastolic flow in the dopplervelocimetry of the umbilical artery.

Methods: A prospective study was conducted on preterm newborns of pregnant women with hypertension between 25 and 33 weeks of gestational age, submitted to umbilical artery Doppler study during the five days before delivery. Delivery occurred at Hospital Regional da Asa Sul, Brasília - Federal District, between November 1st, 2009 and October 31st, 2010.

Red blood cell transfusions are independently associated with intra-hospital mortality in very low birth weight preterm infants.

Objective: To test the hypothesis that red blood cell (RBC) transfusions in preterm infants are associated with increased intra-hospital mortality.

Study Design: Variables associated with death were studied with Cox regression analysis in a prospective cohort of preterm infants with birth weight <1500 g in the Brazilian Network on Neonatal Research. Intra-hospital death and death after 28 days of life were analyzed as dependent variables.

Neonatal meningitis according to the microbiological diagnosis: a decade of experience in a tertiary center.

The aim of this study was to evaluate the incidence of and mortality due to meningitis and compare data according to microbiological diagnosis. This was a ten-year retrospective study conducted at a neonatal intensive care unit (NICU). Newborns with meningitis confirmed by positive CSF culture were included; those with congenital infection or malformations that made lumbar puncture impossible were excluded.