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https://www.readbyqxmd.com/read/28441439/hemodynamics-and-gas-exchange-during-chest-compressions-in-neonatal-resuscitation
#1
Payam Vali, Praveen Chandrasekharan, Munmun Rawat, Sylvia Gugino, Carmon Koenigsknecht, Justin Helman, Bobby Mathew, Sara Berkelhamer, Jayasree Nair, Myra Wyckoff, Satyan Lakshminrusimha
PURPOSE: Current knowledge about pulmonary/systemic hemodynamics and gas exchange during neonatal resuscitation in a model of transitioning fetal circulation with fetal shunts and fluid-filled alveoli is limited. Using a fetal lamb asphyxia model, we sought to determine whether hemodynamic or gas-exchange parameters predicted successful return of spontaneous circulation (ROSC). METHODS: The umbilical cord was occluded in 22 lambs to induce asphyxial cardiac arrest...
2017: PloS One
https://www.readbyqxmd.com/read/28440792/an-extra-uterine-system-to-physiologically-support-the-extreme-premature-lamb
#2
Emily A Partridge, Marcus G Davey, Matthew A Hornick, Patrick E McGovern, Ali Y Mejaddam, Jesse D Vrecenak, Carmen Mesas-Burgos, Aliza Olive, Robert C Caskey, Theodore R Weiland, Jiancheng Han, Alexander J Schupper, James T Connelly, Kevin C Dysart, Jack Rychik, Holly L Hedrick, William H Peranteau, Alan W Flake
In the developed world, extreme prematurity is the leading cause of neonatal mortality and morbidity due to a combination of organ immaturity and iatrogenic injury. Until now, efforts to extend gestation using extracorporeal systems have achieved limited success. Here we report the development of a system that incorporates a pumpless oxygenator circuit connected to the fetus of a lamb via an umbilical cord interface that is maintained within a closed 'amniotic fluid' circuit that closely reproduces the environment of the womb...
April 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28440708/towards-in-vitro-to-in-vivo-translation-of-monoclonal-antibody-pharmacokinetics-application-of-a-neonatal-fc-receptor-mediated-transcytosis-assay-to-understand-the-interplaying-clearance-mechanisms
#3
Claudia A Castro Jaramillo, Sara Belli, Anne-Christine Cascais, Sherri Dudal, Martin R Edelmann, Markus Haak, Marie-Elise Brun, Michael B Otteneder, Mohammed Ullah, Christoph Funk, Franz Schuler, Silke Simon
Monoclonal antibodies (mAbs) are a rapidly growing drug class for which great efforts have been made to optimize certain molecular features in order to achieve the desired pharmacokinetic (PK) properties. One approach is to engineer the interactions of the mAb with the neonatal Fc receptor (FcRn) by introducing specific amino acid sequence mutations, and to assess their effect on the PK profile with in vivo studies. Indeed, FcRn protects mAbs from intracellular degradation, thereby prolongs antibody circulation time in plasma and modulates its systemic clearance...
April 25, 2017: MAbs
https://www.readbyqxmd.com/read/28434009/hypoxic-ischaemic-encephalopathy-and-the-blood-brain-barrier-in-neonates
#4
Wei Ling Amelia Lee, Adina T Michael-Titus, Divyen K Shah
This review aims to highlight a possible relationship between hypoxic-ischaemic encephalopathy (HIE) and the disruption of the blood-brain barrier (BBB). Inflammatory reactions perpetuate a large proportion of cerebral injury. The extent of injury noted in HIE is not only determined by the biochemical cascades that trigger the apoptosis-necrosis continuum of cell death in the brain parenchyma, but also by the breaching of the BBB by pro-inflammatory factors. We examine the changes that contribute to the breakdown of the BBB that occur during HIE at a macroscopic, cellular, and molecular level...
April 22, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28433607/transfer-of-vaginal-chloramphenicol-to-circulating-blood-in-pregnant-women-and-its-relationship-with-their-maternal-background-and-neonatal-health
#5
Satoe Harauchi, Takashi Osawa, Naoko Kubono, Hiroaki Itoh, Takafumi Naito, Junichi Kawakami
Few clinical studies have determined the quantitative transfer of vaginal chloramphenicol to circulating blood in pregnant women. This study aimed to evaluate the plasma concentration of chloramphenicol in pregnant women treated with trans-vaginal tablets and its relationship with maternal background and neonatal health. Thirty-seven pregnant women treated with 100 mg of trans-vaginal chloramphenicol once daily for bacterial vaginosis and its suspected case were enrolled. The plasma concentration of chloramphenicol was determined using liquid chromatography coupled to tandem mass spectrometry at day 2 or later after starting the medication...
April 19, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28428216/maturation-of-platelet-function-during-murine-fetal-development-in-vivo
#6
Andreas Margraf, Claudia Nussbaum, Ina Rohwedder, Sarah Klapproth, Angela R M Kurz, Annamaria Florian, Volker Wiebking, Joachim Pircher, Monika Pruenster, Roland Immler, Steffen Dietzel, Ludmila Kremer, Friedemann Kiefer, Markus Moser, Andreas W Flemmer, Elizabeth Quackenbush, Ulrich H von Andrian, Markus Sperandio
OBJECTIVE: Platelet function has been intensively studied in the adult organism. However, little is known about the function and hemostatic capacity of platelets in the developing fetus as suitable in vivo models are lacking. APPROACH AND RESULTS: To examine fetal platelet function in vivo, we generated a fetal thrombosis model and investigated light-/dye-induced thrombus formation by intravital microscopy throughout gestation. We observed that significantly less and unstable thrombi were formed at embryonic day (E) 13...
April 20, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28413406/a-change-in-ocular-circulation-after-photocoagulation-for-retinopathy-of-prematurity-in-a-neonate
#7
Tadashi Matsumoto, Takashi Itokawa, Tomoaki Shiba, Kotaro Hine, Yuichi Hori
BACKGROUND: The dilation of veins and tortuosity of arteries that occur in retinopathy of prematurity (ROP) are improved by therapy, and thus posttherapy changes in ocular circulation are also conceivable. We report a case of ROP in which we were able to measure the ocular circulation before and after photocoagulation therapy, using a laser speckle flowgraphy (LSFG) system that is modified for neonates. CASE REPORT: A female infant was born at 25 weeks' gestation with a birth weight of 808 g...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28410946/right-atrial-dysfunction-in-the-fetus-with-severely-regurgitant-tricuspid-valve-disease-a-potential-source-of-cardiovascular-compromise
#8
Lisa W Howley, Nee Scze Khoo, Anita J Moon-Grady, Sonali S Patel, Fayeza Alrais, Wayne Tworetzky, Timothy Colen, Paul Brooks, Jean Trines, Tiina Ojala, Lisa K Hornberger
BACKGROUND: In severe right heart obstruction (RHO), redistribution of cardiac output to the left ventricle (LV) is well tolerated by the fetal circulation. Although the same should be true of severely regurgitant tricuspid valve disease (rTVD) with reduced or no output from the right ventricle, affected fetuses more frequently develop hydrops or suffer intrauterine demise. We hypothesized that right atrium (RA) function is altered in rTVD but not in RHO, which could contribute to differences in outcomes...
April 11, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28409646/intravitreal-bevacizumab-alters-type-iv-collagenases-and-exacerbates-arrested-alveologenesis-in-the-neonatal-rat-lungs
#9
Arwin M Valencia, Charles L Cai, Jeffrey Tan, Thomas J Duggan, Gloria B Valencia, Jacob V Aranda, Kay D Beharry
Purpose/Aim: Intravitreal bevacizumab (Avastin) is an irreversible vascular endothelial growth factor (VEGF) inhibitor used off-label to treat severe retinopathy of prematurity in extremely low gestational age neonates. VEGF and matrix metalloproteinases (MMPs) and the tissue inhibitors of metalloproteinases (TIMPs) participate in lung maturation. We tested the hypothesis that intravitreal bevacizumab enters the systemic circulation and has long-lasting effects on lung MMPs. MATERIALS AND METHODS: Neonatal rats were exposed to: (1) hyperoxia (50% O2); (2) intermittent hypoxia (IH) (50% O2 with brief episodes of 12% O2); or (3) room air (RA) from birth (P0) to P14...
April 14, 2017: Experimental Lung Research
https://www.readbyqxmd.com/read/28407326/maternal-lactocrine-programming-of-porcine-reproductive-tract-development
#10
REVIEW
Carol A Bagnell, Teh-Yuan Ho, Ashley F George, Anne A Wiley, Dori J Miller, Frank F Bartol
The lactocrine hypothesis for maternal programming of female reproductive tract development is based on the idea that non-nutritive, milk-borne bioactive factors (MbFs), delivered from mother to offspring during nursing, play a role in determining the trajectory of development with long-term consequences in the adult. Porcine female reproductive tract development is completed postnatally, and the period during which maternal support of neonatal growth derives exclusively from colostrum/milk defines a window of opportunity for lactocrine programming of reproductive tissues...
April 13, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28402911/hassab-s-operation-for-joubert-syndrome-with-congenital-hepatic-fibrosis-a-case-report
#11
Koji Miyazawa, Yasuyuki Hara, Kenji Shimizu, Wataru Nakanishi, Kazuaki Tokodai, Chikashi Nakanishi, Shigehito Miyagi, Naoki Kawagishi, Noriaki Ohuchi
INTRODUCTION: Joubert syndrome is characterized by psychomotor developmental delay, hypotonia, oculomotor abnormalities, occasional retinal dystrophy and cystic kidneys, and frequent and often, striking breathing abnormalities, especially in the neonatal period, with panting tachypnea followed by apnea. We report a case of Joubert syndrome with hepatic fibrosis, portal hypertension, and pancytopenia treated by Hassab's operation. PRESENTATION OF CASE: Our patient was a 27-year-old woman with a history of tachypnea, muscle hypotonia, and psychomotor retardation shortly after birth and a diagnosis of Joubert syndrome at 2 years of age...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28391520/neonatal-repair-of-left-atrial-diverticulum-with-gigantic-thrombus-without-cardiopulmonary-bypass
#12
Akihiko Higashida, Takaya Hoashi, Heima Sakaguchi, Hajime Ichikawa
A 5-day-old neonate with coarctation of the aorta, hypoplastic aortic arch, large apical muscular ventricular septal defect, and patent ductus arteriosus developed pulmonary over-circulation and systemic hypoperfusion underwent bilateral pulmonary artery banding through median sternotomy as a part of hybrid stage I palliation. At operation, left atrial diverticulum with gigantic thrombus formation at the base of the left atrial appendage was incidentally detected by intraoperative direct echocardiography, and therefore, was successfully resected with the whole thrombus inside it without use of cardiopulmonary bypass...
April 8, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28387929/placental-passage-of-antiepileptic-drugs-at-delivery-and-neonatal-outcomes
#13
Anna M Bank, Zachary N Stowe, D Jeffrey Newport, James C Ritchie, Page B Pennell
Children of women treated with antiepileptic drugs (AEDs) are at increased risk of adverse outcomes detectable in the neonatal period, which may be associated with the amount of AEDs in the fetal circulation. Placental passage of AEDs can be measured by calculating the ratio of umbilical cord to maternal AED concentrations collected at delivery. The aims of this study were to determine the umbilical cord concentrations and umbilical-to-maternal ratios for AEDs, and whether higher cord concentrations are associated with increased risk of neonatal complications...
April 7, 2017: Epilepsia
https://www.readbyqxmd.com/read/28384837/the-impact-of-integrated-evaluation-of-hemodynamics-on-management-of-preterm-infants-with-late-onset-compromised-systemic-circulation
#14
Reem Amer, Reem Kalash, Mary M Seshia, Yasser N Elsayed
Objectives To study the impact of integrated evaluation of hemodynamics (IEH), using targeted neonatal echocardiography (TNE), cerebral regional tissue oxygenation (crRTO), and fractional oxygen extraction (FOE), using near-infrared spectroscopy (NIRS) on the management of infants with late-onset compromised systemic circulation (LCSC), and evaluation of the hemodynamic characteristics. Study Design Retrospective cohort study comparing infants with LCSC who underwent IEH (April 2014 to May 2016) with an earlier EPOCH who did not undergo IEH (January 2012 to March 2014)...
April 6, 2017: American Journal of Perinatology
https://www.readbyqxmd.com/read/28383615/seroprevalence-of-hev-antibodies-in-a-sample-of-pregnant-women-in-the-city-of-messina
#15
V La Fauci, A Facciolà, R Riso, S Calimeri, D Lo Giudice, R Squeri
BACKGROUND: Hepatitis E virus (HEV) is widespread in developing countries and the disease is also increasing in the developed ones. This infection in pregnancy can cause spontaneous abortion and neonatal death in 56% of newborns. STUDY DESIGN: The study was conducted on a sample of 352 pregnant women, 326 Italian and 26 foreign, in order to confirm the presence of HEV in our territory, to analyze wrong habits of the population and to suggest preventive actions against the risk to contract the infection during pregnancy...
May 2017: Annali di Igiene: Medicina Preventiva e di Comunità
https://www.readbyqxmd.com/read/28382884/protein-losing-enteropathy-in-biventricular-circulation-precipitated-by-mild-stenosis-of-the-inferior-caval-vein-in-conjunction-with-total-occlusion-of-the-superior-caval-vein-a-word-of-caution
#16
Davide Marini, Brian A McCrossan, Gabriella Agnoletti
We report the case of a young boy with a history of total occlusion of the superior caval vein, diagnosed early after complex neonatal cardiac surgery, who developed severe protein-losing enteropathy. Protein-losing enteropathy was precipitated by a relatively mild stenosis at the junction of the inferior caval vein with the right atrium. Percutaneous stent dilation of the veno-atrial junction definitively relieved the stenosis, and the protein-losing enteropathy subsequently resolved.
April 6, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28382440/tetralogy-of-fallot-surgical-repair-shunt-configurations-ductus-arteriosus-and-the-circle-of-willis
#17
Senol Piskin, Gozde Unal, Ahmet Arnaz, Tayyar Sarioglu, Kerem Pekkan
In this study, hemodynamic performance of three novel shunt configurations that are considered for the surgical repair of tetralogy of Fallot (TOF) disease are investigated in detail. Clinical experience suggests that the shunt location, connecting angle, and its diameter can influence the post-operative physiology and the neurodevelopment of the neonatal patient. An experimentally validated second order computational fluid dynamics (CFD) solver and a parametric neonatal diseased great artery model that incorporates the ductus arteriosus (DA) and the full patient-specific circle of Willis (CoW) are employed...
April 5, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/28369855/in-vivo-activation-of-invariant-natural-killer-t-cells-induces-systemic-and-local-alterations-in-t-cell-subsets-prior-to-preterm-birth
#18
Nardhy Gomez-Lopez, Roberto Romero, Marcia Arenas-Hernandez, George Schwenkel, Derek St Louis, Sonia S Hassan, Tara N Mial
Preterm birth, the leading cause of neonatal morbidity and mortality worldwide, is frequently preceded by spontaneous preterm labor, a syndrome of multiple etiologies. Pathological inflammation is causally linked to spontaneous preterm labor. Indeed, direct activation of invariant natural killer T (iNKT) cells via α-galactosylceramide induces preterm labor/birth largely by initiating systemic and local (i.e., decidua and myometrium) innate immune responses. Herein, we investigated whether iNKT-cell activation altered local and systemic T-cell subsets...
April 2, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28369502/severe-parechovirus-3-infections-in-young-infants-kansas-and-missouri-2014
#19
Claire M Midgley, Mary Anne Jackson, Rangaraj Selvarangan, Patrick Franklin, Elizabeth L Holzschuh, Jennifer Lloyd, Joseph Scaletta, Anne Straily, Sheri Tubach, Ashley Willingham, W Allan Nix, M Steven Oberste, Christopher J Harrison, Charles Hunt, George Turabelidze, Susan I Gerber, John T Watson
Background.: Infection with parechovirus type 3 (PeV3) can cause severe neurologic and sepsis-like illness in young infants; clinical and epidemiologic descriptions have been limited. We aimed to characterize PeV3 illness and explore risk factors for acquisition in a cluster of neonatal cases at Children's Mercy Hospital in Kansas City, Missouri. Methods.: Cerebrospinal fluid specimens were obtained from infants aged <180 days who were hospitalized with sepsis-like illness or meningitis between June 1 and November 1, 2014...
March 29, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28367357/resuscitation-with-intact-placental-circulation-in-a-preterm-infant-with-hydrops-fetalis
#20
Simone Pratesi, Iuri Corsini, Caterina Coviello, Silvia Perugi, Carlo Dani
A preterm infant with prenatal diagnosis of hydrops fetalis was spontaneously delivered at 30 weeks of gestational age in a tertiary level hospital. Prenatal echography pointed out severe bilateral pleural effusions and diffused subcutaneous edema. A neonatologist team, alerted at the expulsion stage of labor, assisted the neonate immediately after birth and bilateral hydrothorax was drained with intact placental circulation to avoid a nonrespiratory period and its possible detrimental hemodynamic effects. The newborn was well stabilized in the delivery room before cutting the umbilical cord and starting mechanical ventilation...
January 2017: American Journal of Perinatology Reports
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