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Surfactant neonate

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https://www.readbyqxmd.com/read/28600154/markers-of-successful-extubation-in-extremely-preterm-infants-and-morbidity-after-failed-extubation
#1
Sanjay Chawla, Girija Natarajan, Seetha Shankaran, Benjamin Carper, Luc P Brion, Martin Keszler, Waldemar A Carlo, Namasivayam Ambalavanan, Marie G Gantz, Abhik Das, Neil Finer, Ronald N Goldberg, C Michael Cotten, Rosemary D Higgins
OBJECTIVES: To identify variables associated with successful elective extubation, and to determine neonatal morbidities associated with extubation failure in extremely preterm neonates. STUDY DESIGN: This study was a secondary analysis of the National Institute of Child Health and Human Development Neonatal Research Network's Surfactant, Positive Pressure, and Oxygenation Randomized Trial that included extremely preterm infants born at 24(0/7) to 27(6/7) weeks' gestation...
June 6, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28588116/high-oxygen-concentrations-adversely-affect-the-performance-of-pulmonary-surfactant
#2
Craig D Smallwood, Parnian Boloori-Zadeh, Maricris R Silva, Andrew Gouldstone
BACKGROUND: Although effective in the neonatal population, exogenous pulmonary surfactant has not demonstrated a benefit in pediatric and adult subjects with hypoxic lung injury despite a sound physiologic rationale. Importantly, neonatal surfactant replacement therapy is administered in conjunction with low fractional FIO2 while pediatric/adult therapy is administered with high FIO2 . We suspected a connection between FIO2 and surfactant performance. Therefore, we sought to assess a possible mechanism by which the activity of pulmonary surfactant is adversely affected by direct oxygen exposure in in vitro experiments...
June 6, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28581337/electroporation-mediated-gene-delivery-of-surfactant-protein-b-sp-b-restores-expression-and-improves-survival-in-mouse-model-of-sp-b-deficiency
#3
Rebecca C Barnett, Xin Lin, Michael Barravecchia, Rosemary A Norman, Karen L de Mesy Bentley, Fabeha Fazal, Jennifer L Young, David A Dean
Surfactant Protein B Deficiency is a rare but lethal monogenetic, congenital lung disease of the neonate that is unresponsive to any treatment except lung transplantation. Based on the potential that gene therapy offers to treat such intractable diseases, our objective was to test whether an electroporation-based gene delivery approach could restore surfactant protein B expression and improve survival in a compound knockout mouse model of surfactant protein B deficiency. Surfactant protein B expression can be shut off in these mice upon withdrawl of doxycycline, resulting in decreased levels of surfactant protein B within four days and death due to lung dysfunction within four to seven days...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28569744/delivery-room-interventions-to-prevent-bronchopulmonary-dysplasia-in-extremely-preterm-infants
#4
E E Foglia, E A Jensen, H Kirpalani
Bronchopulmonary dysplasia (BPD) is the most common chronic respiratory complication of preterm birth. Preterm infants are at risk for acute lung injury immediately after birth, which predisposes to BPD. In this article, we review the current evidence for interventions applied during neonatal transition (delivery room and first postnatal hours of life) to prevent BPD in extremely preterm infants: continuous positive airway pressure (CPAP), sustained lung inflation, supplemental oxygen use during neonatal resuscitation, and surfactant therapy including less-invasive surfactant administration...
June 1, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28540346/less-invasive-surfactant-administration-reduces-the-need-for-mechanical-ventilation-in-preterm-infants-a-meta-analysis
#5
Christine S M Lau, Ronald S Chamberlain, Shyan Sun
Neonatal respiratory distress syndrome due to surfactant deficiency is associated with high morbidity and mortality in preterm infants, and the use of less invasive surfactant administration (LISA) has been increasingly studied. This meta-analysis found that LISA via thin catheter significantly reduced the need for mechanical ventilation within the first 72 hours (relative risk [RR] = 0.677; P = .021), duration of mechanical ventilation (difference in means [MD] = -39.302 hours; P < .001), duration of supplemental oxygen (MD = -68...
2017: Global Pediatric Health
https://www.readbyqxmd.com/read/28538240/sharing-progress-in-neonatal-spin-brain-gut-heart-and-lung-incorporating-the-32nd-international-workshop-on-surfactant-replacement-dublin-may-26-27-2017-abstracts
#6
https://www.readbyqxmd.com/read/28513901/transcriptomic-profiling-reveals-disordered-regulation-of-surfactant-homeostasis-in-neonatal-cloned-bovines-with-collapsed-lungs-and-respiratory-distress
#7
Yan Liu, Yifan Rao, Xiaojing Jiang, Fanyi Zhang, Linhua Huang, Weihua Du, Haisheng Hao, Xueming Zhao, Dong Wang, Qiuling Jiang, Huabin Zhu, Xiuzhu Sun
Respiratory distress is a major cause of mortality in cloned neonatal animals, but its pathogenesis remains poorly understood. Here, we used necropsy and histology procedures to evaluate the lungs of cloned neonatal bovines dying of respiratory distress, finding incomplete lung dilation, alveolar collapse, and thickened alveolar walls. Comparison of the transcriptomes between collapsed lungs of cloned bovines and their normal counterparts revealed 1373 differentially expressed genes in collapsed lungs (p < 0...
May 17, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28510235/surfactants-in-acute-respiratory-distress-syndrome-in-infants-and-children-past-present-and-future
#8
REVIEW
Angela Amigoni, Andrea Pettenazzo, Valentina Stritoni, Maria Circelli
There is a lack of definitive data on the effective management of acute respiratory distress syndrome (ARDS) in infants and children. The development and validation of the Berlin definition (BD) for ARDS and the Pediatric Acute Lung Injury Consensus Conference (PALICC) recommendations in children represented a major advance in optimizing research and treatment, mainly due to the introduction of a severe ARDS category. Proposed reasons for the lack of consistent results with surfactants in children and infants compared with neonates include different causes, type of lung damage (direct or indirect), timing and mode of administration as well as the type of surfactant used...
May 16, 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28507580/impact-of-antenatal-oxytocin-infusion-on-neonatal-respiratory-morbidity-associated-with-elective-cesarean-section
#9
Ibrahim Abdelazim, Mohamed M M Farghali, Assem A M Elbiaa, Khaled M Abdelrazak, Mohamed Hussain, Amr H Yehia, Mona Rashad
INTRODUCTION: This study was designed to estimate respiratory morbidity associated with elective cesarean section (ECS) and to determine the effect of antenatal oxytocin exposure on this morbidity. MATERIAL AND METHODS: Nine hundred and sixty-five neonates ≥ 37 weeks' gestation delivered by cesarean section during 1 year were included in this retrospective study and classified into two groups according to oxytocin exposure before cesarean deliveries. Respiratory morbidity for each group was recorded and statistically analyzed...
April 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28503550/design-of-surfactant-protein-b-peptide-mimics-based-on-the-saposin-fold-for-synthetic-lung-surfactants
#10
Frans J Walther, Larry M Gordon, Alan J Waring
Surfactant protein (SP)-B is a 79-residue polypeptide crucial for the biophysical and physiological function of endogenous lung surfactant. SP-B is a member of the Saposin or Saposin-like proteins (SAPLIP) family of proteins that share an overall three-dimensional folding pattern based on secondary structures and disulfide connectivity and exhibit a wide diversity of biological functions. Here we review the synthesis, molecular biophysics and activity of synthetic analogs of Saposin proteins designed to mimic those interactions of the parent proteins with lipids that enhance interfacial activity...
September 2016: Biomedicine Hub
https://www.readbyqxmd.com/read/28443559/the-evolution-of-modern-respiratory-care-for-preterm-infants
#11
REVIEW
Louise S Owen, Brett J Manley, Peter G Davis, Lex W Doyle
Preterm birth rates are rising, and many preterm infants have breathing difficulty after birth. Treatments for infants with prolonged breathing difficulty include oxygen therapy, exogenous surfactant, various modes of respiratory support, and postnatal corticosteroids. In this Series paper, we review the history of neonatal respiratory care and its effect on long-term outcomes, and we outline the future direction of the research field. The delivery and monitoring of oxygen therapy remains controversial, despite being in use for more than 50 years...
April 22, 2017: Lancet
https://www.readbyqxmd.com/read/28435650/postnatal-transitional-weight-loss-and-adverse-outcomes-in-extremely-premature-neonates
#12
Rita P Verma, Syed Shibli, Eugene Komaroff
The early postnatal weight loss (EPWL) is highly variable in the extremely low birth weight infants (birth weight <1000 g, ELBW). It is reported to be unassociated with adverse outcomes within a range of 3-21% of birth weight. Its wide range might have contributed to this lack of association. The aim of our paper is to study the effects of maximum EPWL, graded as low, medium and large on clinical outcomes in ELBW infants. In a retrospective cohort observational study EPWL was measured as maximum weight loss from birth weight (MWL) in ELBW infants and grouped as low (5-12%) moderate (18...
March 22, 2017: Pediatric Reports
https://www.readbyqxmd.com/read/28410573/risk-factors-for-necrotizing-enterocolitis-in-neonates-a-systematic-review-of-prognostic-studies
#13
Noor Samuels, Rob A van de Graaf, Rogier C J de Jonge, Irwin K M Reiss, Marijn J Vermeulen
BACKGROUND: Necrotizing enterocolitis (NEC) is a severe multifactorial disease in preterm neonates associated with high morbidity and mortality. Better insight into prognostic values of the many reported factors associated with NEC is needed to enable identification of neonates at risk for NEC. The aim was to systematically review the literature to identify independent risk factors for NEC from the literature. METHODS: Medline, Cochrane, Embase, Pubmed and Google Scholar were searched systematically for cohort studies reporting prognostic factors for NEC in neonates using multivariable analysis...
April 14, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28409751/early-extubation-failure-in-very-low-birth-weight-infants-clinical-outcomes-and-predictive-factors
#14
K Al-Hathlol, N Bin Saleem, M Khawaji, S Al Saif, I Abdelhakim, B Al-Hathlol, E Bazbouz, Q Al Anzi, A Al-Essa
OBJECTIVE: To identify the clinical outcomes and the potential predictive factors of early extubation failure (EEF) in very low birth weight (VLBW) infants. METHODS: A retrospective study of VLBW infants admitted to the neonatal intensive care unit (NICU) over fifteen years. Neonates were intubated and mechanically ventilated on the first day of life, and early extubated within the first 3 days. EEF was defined as the need for re-intubation within 3 days of the first extubation...
2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28407825/-effect-of-pregnancy-induced-hypertension-syndrome-on-complications-in-very-low-birth-weight-preterm-infants
#15
Song-Zhou Xu, Xiao-Yan Hu, Fang Zhao, Yu-Xin Zhou, Shuang-Chuan Zhang
OBJECTIVE: To study the effect of pregnancy-induced hypertension syndrome (PIH) on complications in very low birth weight (VLBW) preterm infants. METHODS: The VLBW preterm infants were enrolled as research subjects, and according to the presence or absence of PIH in their mothers, they were divided into PIH group and non- PIH group. The incidence of major complications and length of hospital stay were compared between the two groups. RESULTS: There were no significant differences between the two groups in gestational age, birth weight, sex, incidence rate of maternal diabetes, and use of antepartum hormone...
April 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28370230/interventions-to-reduce-neonatal-mortality-a-mathematical-model-to-evaluate-impact-of-interventions-in-sub-saharan-africa
#16
Jennifer B Griffin, Elizabeth M McClure, Beena D Kamath-Rayne, Bonnie M Hepler, Doris J Rouse, Alan H Jobe, Robert L Goldenberg
AIM: To determine which interventions would have the greatest impact on reducing neonatal mortality in sub-Saharan Africa in 2012. METHODS: We used MANDATE, a mathematical model, to evaluate scenarios for the impact of available interventions on neonatal deaths from primary causes, including: (i) for birth asphyxia - obstetric care preventing intrapartum asphyxia, newborn resuscitation and treatment of asphyxiated infants; (ii) for preterm birth - corticosteroids, oxygen, continuous positive air pressure and surfactant; and, (iii) for serious newborn infection - clean delivery, chlorhexidine cord care and antibiotics...
March 31, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28363760/interstitial-lung-disease-in-newborns
#17
REVIEW
Lawrence M Nogee
The term 'interstitial lung disease' (ILD) refers to a group of disorders involving both the airspaces and tissue compartments of the lung, and these disorders are more accurately termed diffuse lung diseases. Although rare, they are associated with significant morbidity and mortality, with the prognosis depending upon the specific diagnosis. The major categories of ILD in children that present in the neonatal period include developmental disorders, growth disorders, surfactant dysfunction disorders, and specific conditions of unknown etiology unique to infancy...
March 28, 2017: Seminars in Fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28349627/rigid-catheters-reduced-duration-of-less-invasive-surfactant-therapy-procedures-in-manikins
#18
V Rigo, C Debauche, P Maton, I Broux, D Van Laere
AIM: Different catheters can be used for less invasive surfactant therapy (LIST): feeding tubes inserted with or without Magill forceps, different angiocatheters and centre specific devices, such as umbilical catheters affixed to a stylet. This study compared the effectiveness of LIST devices and endotracheal tubes (ETT). METHODS: Video recordings of 20 neonatologists simulating different LIST techniques on two manikin heads were analysed. Procedural effectiveness was evaluated by the duration of procedures and failure rates...
March 27, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28341439/restoring-pulmonary-surfactant-membranes-and-films-at-the-respiratory-surface
#19
REVIEW
Mercedes Echaide, Chiara Autilio, Raquel Arroyo, Jesus Perez-Gil
Pulmonary surfactant is a complex of lipids and proteins assembled and secreted by the alveolar epithelium into the thin layer of fluid coating the respiratory surface of lungs. There, surfactant forms interfacial films at the air-water interface, reducing dramatically surface tension and thus stabilizing the air-exposed interface to prevent alveolar collapse along respiratory mechanics. The absence or deficiency of surfactant produces severe lung pathologies. This review describes some of the most important surfactant-related pathologies, which are a cause of high morbidity and mortality in neonates and adults...
March 21, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28338487/the-evolution-of-disease-chronic-lung-disease-of-infancy-and-pulmonary-hypertension
#20
Michael C Tracy, David N Cornfield
PURPOSE OF REVIEW: Bronchopulmonary dysplasia (BPD) or chronic lung disease of infancy BPD was originally described 50 years ago, in 1967 by Northway et al. This article possesses two fundamental objectives to provide: a brief historical perspective on BPD; and an update relative to current notions of epidemiology, pathophysiology, evaluation, and clinical management of BPD complicated by vascular disease. The review highlights areas of consensus and ongoing uncertainty. RECENT FINDINGS: The clinical cause and presentation of infants with BPD has evolved over the past several decades...
June 2017: Current Opinion in Pediatrics
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