Key paediatric messages from Amsterdam

The Paediatric Assembly of the European Respiratory Society (ERS) maintained its high profile at the 2015 ERS International Congress in Amsterdam. There were symposia on preschool wheeze, respiratory sounds and cystic fibrosis; an educational skills workshop on paediatric respiratory resuscitation; a hot topic session on risk factors and early origins of respiratory diseases; a meet the expert session on paediatric lung function test reference values; and the annual paediatric grand round. In this report the Chairs of the Paediatric Assembly’s Groups highlight the key mess

Recommendations for neonatologist performed echocardiography in Europe: Consensus Statement endorsed by European Society for Paediatric Research (ESPR) and European Society for Neonatology (ESN)

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Symptoms of depression in parents after discharge from NICU associated with family-centred care

AimsThe aim of this study was to examine the potential association of family-centred care as perceived by parents during a NICU stay with parents’ depressive symptoms at discharge and at 4 months corrected for infant age.DesignA longitudinal, multicentre cohort study was conducted from 2018 to 2020 in 23 NICUs across 15 countries.MethodsParents (n = 635 mothers, n = 466, fathers) of infants (n = 739) born before 35 weeks of gestation and admitted to the participating NICUs were enrolled to the study during the first weeks of their infants’ hospitalizations. They responded to Digi-FCC daily text messages inquiring about their perception of family-centred care provided by NICU staff. In addition, they completed a questionnaire assessing their overall perception of family-centred care at discharge. Parents’ depressive symptoms were measured by the Edinburgh Postnatal Depression Scale at discharge and again after discharge when their infants were at 4 months corrected for age.ResultsThe mothers’ and the fathers’ perceptions of family-centred care were associated with their depressive symptoms at discharge and at 4 months corrected age, controlling for gestational age, multiple birth, parent education and relationship status. Parents’ participation in infant care, care-related decisions and emotional support provided to parents by staff explained the variation in the parents’ perceptions of family-centred care. The factors facilitating the implementation of family-centred care included unlimited access to the unit for the parents and for their significant others, as well as amenities for parents.ConclusionsOur study shows that family-centred NICU care associates with parents’ depressive symptoms after a NICU stay.ImpactDepression is common in parents of preterm infants. The provision of family-centred care may protect the mental well-being of parents of preterm infants.</p

Decreased surfactant phosphatidylcholine synthesis in neonates with congenital diaphragmatic hernia during extracorporeal membrane oxygenation

Purpose: Congenital diaphragmatic hernia (CDH) may result in severe respiratory insufficiency with a high morbidity. The role of a disturbed surfactant metabolism in the pathogenesis of CDH is unclear. We therefore studied endogenous surfactant metabolism in the most severe CDH patients who required extracorporeal membrane oxygenation (ECMO). Methods: Eleven neonates with CDH who required ECMO and ten ventilated neonates without significant lung disease received a 24-h infusion of the stable isotope [U-13C] glucose. The13C-incorporation into palmitic acid in surfactant phosphatidylcholine (PC) isolated from serial tracheal aspirates was measured. Mean PC concentration in epithelial lining fluid (ELF) was measured during the first 4 days of the study. Results: Fractional surfactant PC synthesis was decreased in CDH-ECMO patients compared to controls (2.4 ± 0.33 vs. 8.0 ± 2.4%/day, p = 0.04). The control group had a higher maximal enrichment (0.18 ± 0.03 vs. 0.09 ± 0.02 APE, p = 0.04) and reached this maximal enrichment earlier (46.7 ± 3.0 vs. 69.4 ± 6.6 h, p = 0.004) compared to the CDH-ECMO group, which reflects higher and faster precursor incorporation in the control group. Surfactant PC concentration in ELF was similar in both groups. Conclusion: These results show that CDH patients who require ECMO have a decreased surfactant PC synthesis, which may be part of the pathogenesis of severe pulmonary insufficiency and has a negative impact on weaning from ECMO

Decreased surfactant phosphatidylcholine synthesis in neonates with congenital diaphragmatic hernia during extracorporeal membrane oxygenation

Purpose: Congenital diaphragmatic hernia (CDH) may result in severe respiratory insufficiency with a high morbidity. The role of a disturbed surfactant metabolism in the pathogenesis of CDH is unclear. We therefore studied endogenous surfactant metabolism in the most severe CDH patients who required extracorporeal membrane oxygenation (ECMO). Methods: Eleven neonates with CDH who required ECMO and ten ventilated neonates without significant lung disease received a 24-h infusion of the stable isotope [U-13C] glucose. The13C-incorporation into palmitic acid in surfactant phosphatidylcholine (PC) isolated from serial tracheal aspirates was measured. Mean PC concentration in epithelial lining fluid (ELF) was measured during the first 4 days of the study. Results: Fractional surfactant PC synthesis was decreased in CDH-ECMO patients compared to controls (2.4 ± 0.33 vs. 8.0 ± 2.4%/day, p = 0.04). The control group had a higher maximal enrichment (0.18 ± 0.03 vs. 0.09 ± 0.02 APE, p = 0.04) and reached this maximal enrichment earlier (46.7 ± 3.0 vs. 69.4 ± 6.6 h, p = 0.004) compared to the CDH-ECMO group, which reflects higher and faster precursor incorporation in the control group. Surfactant PC concentration in ELF was similar in both groups. Conclusion: These results show that CDH patients who require ECMO have a decreased surfactant PC synthesis, which may be part of the pathogenesis of severe pulmonary insufficiency and has a negative impact on weaning from ECMO

Surfactant metabolism in the newborn : The impact of ventilation strategy and lung disease

Developmental deficiency in pulmonary surfactant leads to respiratory distress syndrome (RDS) in preterm infants, but all newborns may have impaired surfactant metabolism secondary to lung disease or ventilator induced lung injury. Exogenous surfactant treatment is usually administered in conjunction with mechanical ventilation. If instead surfactant administration is followed by nasal continuous positive airway pressure (nCPAP), the treatment response appears to be more sustained. The aims of the thesis were to (1) distinguish normal and abnormal surfactant turnover in term and preterm infants using a novel stable isotope technique, (2) determine if high frequency oscillatory ventilation (HFOV) decreases surfactant production in preterm infants with RDS, (3) systematically examine stable isotope methodology for in vivo studies of surfactant metabolism (4) follow-up the implementation of INSURE, i.e. surfactant administration during a brief intubation, and (5) experimentally test the hypothesis, that surfactant administration followed by spontaneous breathing improves the treatment response. After an intravenous infusion of stable isotope (13C) labeled precursors for surfactant phospholipid, the 13C-enrichment over time was measured in serial tracheal aspirates using gas chromatography/mass spectrometry. Term infants without lung disease had significantly faster endogenous surfactant turnover compared to preterm infants with RDS. Term infants with severe respiratory failure exhibited disrupted surfactant metabolism and decreased amounts of surfactant phospholipids in tracheal aspirates, suggesting delayed maturity of the surfactant system or impairment from the underlying disease. HFOV versus conventional ventilation did not affect the surfactant metabolic indices in preterm infants with RDS. The method yielded reproducible data and similar surfactant metabolic indices regardless of mass spectrometry instrumentation and the surfactant phospholipid pool being analysed. Fractional catabolic rate, which is tracer independent, is suggested to be the primary measure of surfactant turnover. A retrospective, 10-year follow-up of all inborn infants with RDS (n=420, gestational age >=27 to <34 weeks) at two Stockholm neonatal units showed that after the implementation of INSURE, the number of infants requiring mechanical ventilation was reduced by 50%, with no adverse effects on outcome. Surfactant treatment by INSURE resulted in a sustained improvement in oxygenation and a significant reduction in additional surfactant doses. In a preterm rabbit model, animals received radiolabeled surfactant and were randomized to spontaneous breathing or mechanical ventilation. The mechanical ventilation group exhibited impaired tissue association of labeled surfactant, lower dynamic compliance and evidence of surfactant inactivation, consistent with a poorer treatment response. In conclusion, this investigation is one of the first to describe normal surfactant turnover in vivo in term infants. Severe lung disease in term infants disrupts endogenous surfactant metabolism similar to that of infants with developmental surfactant deficiency. Mode of mechanical ventilation has minimal impact on endogenous surfactant turnover in preterm infants with RDS. However, the treatment response to exogenous surfactant is significantly impaired by mechanical ventilation, both clinically and experimentally. The INSURE strategy for surfactant treatment is a powerful approach to improve the treatment response and reduce the need for mechanical ventilation in moderately preterm infants

Physical Activity in 6.5-Year-Old Children Born Extremely Preterm

Physical activity (PA) can prevent cardiovascular diseases. Because of increased risks of impairments affecting motor activity, PA in children born preterm may differ from that in children born at term. In this prospective cohort study, we compared objectively measured PA in 71 children born extremely preterm (Peer reviewe

Long-term impact of preterm birth on exercise capacity in healthy young men: a national population-based cohort study.

BACKGROUND: Increasing numbers of survivors of preterm birth are growing into adulthood today. Long-term health-effects of prematurity are still poorly understood, but include increased risk for diabetes, obesity and cardiovascular diseases in adult life. To test if reduced physical fitness may be a link in the causal chain of preterm birth and diseases in later life, the association of preterm birth and adult exercise capacity was investigated. The hypothesis was that preterm birth contributes independently of other risk factors to lower physical fitness in adulthood. METHODS AND FINDINGS: Population-based national cohort study of all males conscripting for military service in 1993-2001 and born in Sweden 1973-1983, n = 218,820. Data were retrieved from the Swedish Conscript Register, the Medical Birth Register and the Population and Housing Census 1990. Primary outcome was the results from maximal exercise test (Wmax in Watt) performed at conscription. Association to perinatal and socioeconomic risk factors, other co-variates and confounders were analysed. General linear modelling showed that preterm birth predicted low Wmax in a dose-response related pattern, with 25 Watt reduction in Wmax for the lowest gestational ages, those born ≤27 weeks. Low birth weight for gestational age also independently predicted low Wmax compared to normal and high birth weight (32 Watt reduction for those with a birth weight Standard Deviation Score <2). Low parental education was significantly associated with reduced Wmax (range 17 Watt), as well as both low and high current BMI, with severe obesity resulting in a 16 Watt deficit compared to Wmax top performance. CONCLUSION: Being born preterm as well as being born small for gestational age predicts low exercise capacity in otherwise healthy young men. The effect size of being born preterm equal or exceed that of other known risk factors for unfitness in adults, such as low parental education and overweight

Surfactant replacement therapy: from biological basis to current clinical practice.

This review summarizes the current knowledge on the physiological action of endogenous and exogenous pulmonary surfactant, the role of different types of animal-derived and synthetic surfactants for RDS therapy, different modes of administration, potential risks and strategies of ventilation, and highlights the most promising aims for future development. Scientists have clarified the physicochemical properties and functions of the different components of surfactant, and part of this successful research is derived from the characterization of genetic diseases affecting surfactant composition or function. Knowledge from functional tests of surfactant action, its immunochemistry, kinetics and homeostasis are important also for improving therapy with animal-derived surfactant preparations and for the development of modified surfactants. In the past decade newly designed artificial surfactants and additives have gained much attention and have proven different advantages, but their particular role still has to be defined. For clinical practice, alternative administration techniques as well as postsurfactant ventilation modes, taking into account alterations in lung mechanics after surfactant placement, may be important in optimizing the potential of this most important drug in neonatology