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Perinatal asphyxia

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https://www.readbyqxmd.com/read/28435017/association-of-paraoxonase-1-and-oxidative-stress-with-acute-kidney-injury-in-premature-asphyxiated-neonates
#1
Jasmina Ivanišević, Jelena Kotur-Stevuljević, Aleksandra Stefanović, Milica Miljković, Zorana Jelić-Ivanović, Biljana Pejović, Amira Peco-Antić
OBJECTIVES: Acute kidney injury (AKI) is defined as decrease in glomerular filtration rate with increase in serum creatinine (sCr). Perinatal asphyxia (PNA) may be an ethiological factor for AKI with oxidative stress also implicated. Paraoxonase 1 (PON1) has been reported to be decreased in renal diseases. The aim of our study was to evaluate paraoxonase 1 (PON1) and oxidative stress status, their change during the first hours and days of life and the ability of these parameters to discriminate neonates having AKI from those who do not have it...
April 20, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28431617/short-term-outcome-of-functional-integrity-of-the-auditory-brainstem-in-term-infants-who-suffer-perinatal-asphyxia
#2
Ze D Jiang, Cao Chen
OBJECTIVES: To assess short-term outcome of impaired functional integrity of the auditory brainstem in term infants who suffer perinatal asphyxia. METHODS: Maximum length sequence brainstem auditory evoked response (MLS BAER) was recorded and analyzed at a mean age of 3months in term infants after perinatal asphyxia. The data were compared with age-matched normal term infants. RESULTS: The infants after asphyxia showed an increase in the latency of MLS BAER wave III at 91, 455 and 910/s, and wave V at all click rates of 91-910/s...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28412875/amino-acid-and-acylcarnitine-profiles-in-perinatal-asphyxia-a-case-control-study
#3
Ola Galal El-Farghali, Mohamed Sami El-Chimi, Heba Salah El-Abd, Eman El-Desouky
OBJECTIVE: To estimate cord blood amino acid and acylcarnitine levels in term newborns exposed to perinatal asphyxia. MATERIALS AND METHODS: We studied 45 asphyxiated term newborns (cases) and 20 gestational age-matched healthy newborns (control). Sixteen cases developed HIE according to clinical scoring and amplitude-integrated electroencephalography. Asphyxiated cases were accordingly subdivided into: HIE group (n = 16) and Asphyxia group (n = 29). Amino acid and acylcarnitine levels were measured in cord blood dried spot samples from all newborns using ultra-performance liquid chromatography-mass spectrometry (UPLC-MS)...
April 16, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28409761/the-question-of-whether-or-not-to-perform-therapeutic-hypothermia-a-case-of-neonatal-spinal-cord-injury
#4
K Yokoi, S Kobayashi, K Muramatsu, S Suzuki, H Gotou
Neonatal spinal cord injury is an extremely rare perinatal complication that often occurs concurrently with hypoxic ischemic encephalopathy (HIE), further complicating diagnosis of spinal cord injury. Although therapeutic hypothermia for moderate to severe HIE is widely recommended in Japan, it is difficult to determine whether it satisfies the neurological findings-related entry criteria in some patients.We describe a female infant with neonatal spinal cord injury after forceps delivery, who underwent therapeutic hypothermia upon diagnosis of HIE...
April 8, 2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28402972/eeg-a-valuable-biomarker-of-brain-injury-in-preterm-infants
#5
Elena Pavlidis, Rhodri O Lloyd, Geraldine B Boylan
This review focuses on the role of electroencephalography (EEG) in monitoring abnormalities of preterm brain function. EEG features of the most common developmental brain injuries in preterm infants, including intraventricular haemorrhage, periventricular leukomalacia, and perinatal asphyxia, are described. We outline the most common EEG biomarkers associated with these injuries, namely seizures, positive rolandic sharp waves, EEG suppression/increased interburst intervals, mechanical delta brush activity, and other deformed EEG waveforms, asymmetries, and asynchronies...
April 13, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28395175/oxygen-and-oxidative-stress-in-the-perinatal-period
#6
REVIEW
Isabel Torres-Cuevas, Anna Parra-Llorca, Angel Sánchez-Illana, Antonio Nuñez-Ramiro, Julia Kuligowski, Consuelo Cháfer-Pericás, María Cernada, Justo Escobar, Máximo Vento
Fetal life evolves in a hypoxic environment. Changes in the oxygen content in utero caused by conditions such as pre-eclampsia or type I diabetes or by oxygen supplementation to the mother lead to increased free radical production and correlate with perinatal outcomes. In the fetal-to-neonatal transition asphyxia is characterized by intermittent periods of hypoxia ischemia that may evolve to hypoxic ischemic encephalopathy associated with neurocognitive, motor, and neurosensorial impairment. Free radicals generated upon reoxygenation may notably increase brain damage...
March 12, 2017: Redox Biology
https://www.readbyqxmd.com/read/28392287/blocked-delayed-or-obstructed-what-causes-poor-white-matter-development-in-intrauterine-growth-restricted-infants
#7
REVIEW
Mary Tolcos, Steven Petratos, Jonathan J Hirst, Flora Wong, Sarah J Spencer, Aminath Azhan, Ben Emery, David W Walker
Poor white matter development in intrauterine growth restricted (IUGR) babies remains a major, untreated problem in neonatology. New therapies, guided by an understanding of the mechanisms that underlie normal and abnormal oligodendrocyte development and myelin formation, are required. Much of our knowledge of the mechanisms that underlie impaired myelination come from studies in adult demyelinating disease, preterm brain injury, or experimental models of hypoxia-ischemia. However relatively less is known for IUGR which is surprising because IUGR is a leading cause of perinatal mortality and morbidity, second only to premature birth...
April 6, 2017: Progress in Neurobiology
https://www.readbyqxmd.com/read/28391258/dexmedetomidine-combined-with-therapeutic-hypothermia-is-associated-with-cardiovascular-instability-and-neurotoxicity-in-a-piglet-model-of-perinatal-asphyxia
#8
Mojgan Ezzati, Go Kawano, Eridan Rocha-Ferreira, Daniel Alonso-Alconada, Jane K Hassell, Kevin D Broad, Igor Fierens, Bobbi Fleiss, Alan Bainbridge, David L Price, Pardis Kaynezhad, Brian Anderson, Mariya Hristova, Ilias Tachtsidis, Xavier Golay, Pierre Gressens, Robert D Sanders, Nicola J Robertson
The selective α2-adrenoreceptor agonist dexmedetomidine has shown neuroprotective, analgesic, anti-inflammatory, and sympatholytic properties that may be beneficial in neonatal encephalopathy (NE). As therapeutic hypothermia is only partially effective, adjunct therapies are needed to optimize outcomes. The aim was to assess whether hypothermia + dexmedetomidine treatment augments neuroprotection compared to routine treatment (hypothermia + fentanyl sedation) in a piglet model of NE using magnetic resonance spectroscopy (MRS) biomarkers, which predict outcomes in babies with NE, and immunohistochemistry...
April 8, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28387144/antenatal-dexamethasone-before-asphyxia-promotes-cystic-neural-injury-in-preterm-fetal-sheep-by-inducing-hyperglycemia
#9
Christopher A Lear, Joanne O Davidson, Georgia R Mackay, Paul P Drury, Robert Galinsky, Josine S Quaedackers, Alistair J Gunn, Laura Bennet
Antenatal glucocorticoid therapy significantly improves the short-term systemic outcomes of prematurely born infants, but there is limited information available on their impact on neurodevelopmental outcomes in at-risk preterm babies exposed to perinatal asphyxia. Preterm fetal sheep (0.7 of gestation) were exposed to a maternal injection of 12 mg dexamethasone or saline followed 4 h later by asphyxia induced by 25 min of complete umbilical cord occlusion. In a subsequent study, fetuses received titrated glucose infusions followed 4 h later by asphyxia to examine the hypothesis that hyperglycemia mediated the effects of dexamethasone...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28358979/pelvimetry-for-fetal-cephalic-presentations-at-or-near-term-for-deciding-on-mode-of-delivery
#10
REVIEW
Robert C Pattinson, Anna Cuthbert, Valerie Vannevel
BACKGROUND: Pelvimetry assesses the size of a woman's pelvis aiming to predict whether she will be able to give birth vaginally or not. This can be done by clinical examination, or by conventional X-rays, computerised tomography (CT) scanning, or magnetic resonance imaging (MRI). OBJECTIVES: To assess the effects of pelvimetry (performed antenatally or intrapartum) on the method of birth, on perinatal mortality and morbidity, and on maternal morbidity. This review concentrates exclusively on women whose fetuses have a cephalic presentation...
March 30, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28351384/maternal-characteristics-and-obstetrical-complications-impact-neonatal-outcomes-in-indonesia-a-prospective-study
#11
Trisari Anggondowati, Ayman A E El-Mohandes, S Nurul Qomariyah, Michele Kiely, Judith J Ryon, Reginald F Gipson, Benjamin Zinner, Anhari Achadi, Linda L Wright
BACKGROUND: We investigated associations between maternal characteristics, access to care, and obstetrical complications including near miss status on admission or during hospitalization on perinatal outcomes among Indonesian singletons. METHODS: We prospectively collected data on inborn singletons at two hospitals in East Java. Data included socio-demographics, reproductive, obstetric and neonatal variables. Reduced multivariable models were constructed. Outcomes of interest included low and very low birthweight (LBW/VLBW), asphyxia and death...
March 28, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28343228/focal-brain-injury-associated-with-a-model-of-severe-hypoxic-ischemic-encephalopathy-in-nonhuman-primates
#12
Ryan M McAdams, Ronald J McPherson, Raj P Kapur, Sandra E Juul
Worldwide, hypoxic-ischemic encephalopathy (HIE) is a major cause of neonatal mortality and morbidity. To better understand the mechanisms contributing to brain injury and improve outcomes in neonates with HIE, better preclinical animal models that mimic the clinical situation following birth asphyxia in term newborns are needed. In an effort to achieve this goal, we modified our nonhuman primate model of HIE induced by in utero umbilical cord occlusion (UCO) to include postnatal hypoxic episodes, in order to simulate apneic events in human neonates with HIE...
March 25, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28330965/greater-sympathoadrenal-activation-with-longer-pre-ventilation-intervals-after-immediate-cord-clamping-increases-hemodynamic-lability-at-birth-in-preterm-lambs
#13
Joseph J Smolich, Kelly R Kenna, Murray David Esler, Sarah E Phillips, Gavin W Lambert
This study tested the hypothesis that varying degrees of hemodynamic fluctuations seen after birth following immediate cord clamping were related to development of asphyxia with longer cord clamp-to-ventilation intervals, resulting in higher perinatal circulating levels of the catecholamines norepinephrine (NE) and epinephrine (Epi), and thus increased heart rate, blood pressures and cardiac contractility after birth. Anesthetized preterm fetal lambs were instrumented with 1) aortic (AoT) and pulmonary trunk (PT) micromanometers to obtain pressures and the maximal rate of pressure rise (dP/dtmax) as a surrogate measure of ventricular contractility, and 2) an AoT catheter to obtain samples for blood gas and catecholamine analyses...
March 22, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28326198/could-perinatal-asphyxia-induce-a-synaptopathy-new-highlights-from-an-experimental-model
#14
REVIEW
María Inés Herrera, Matilde Otero-Losada, Lucas Daniel Udovin, Carlos Kusnier, Rodolfo Kölliker-Frers, Wanderley de Souza, Francisco Capani
Birth asphyxia also termed perinatal asphyxia is an obstetric complication that strongly affects brain structure and function. Central nervous system is highly susceptible to oxidative damage caused by perinatal asphyxia while activation and maturity of the proper pathways are relevant to avoiding abnormal neural development. Perinatal asphyxia is associated with high morbimortality in term and preterm neonates. Although several studies have demonstrated a variety of biochemical and molecular pathways involved in perinatal asphyxia physiopathology, little is known about the synaptic alterations induced by perinatal asphyxia...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28325678/early-neonatal-deaths-associated-with-perinatal-asphyxia-in-infants-%C3%A2-2500g-in-brazil
#15
Maria Fernanda Branco de Almeida, Mandira Daripa Kawakami, Lícia Maria Oliveira Moreira, Rosa Maria Vaz Dos Santos, Lêni Márcia Anchieta, Ruth Guinsburg
OBJECTIVE: To assess the annual burden of early neonatal deaths associated with perinatal asphyxia in infants weighing ≥2500g in Brazil from 2005 to 2010. METHODS: The population study enrolled all live births of infants with birth weight ≥2500g and without malformations who died up to six days after birth with perinatal asphyxia, defined as intrauterine hypoxia, asphyxia at birth, or meconium aspiration syndrome. The cause of death was written in any field of the death certificate, according to International Classification of Diseases, 10th Revision (P20...
March 19, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28277490/erythropoietin-monotherapy-in-perinatal-asphyxia-with-moderate-to-severe-encephalopathy-a-randomized-placebo-controlled-trial
#16
R R Malla, R Asimi, M A Teli, F Shaheen, M A Bhat
OBJECTIVE: Erythropoietin (EPO) is neuroprotective after asphyxia in animal studies. The efficacy and safety of EPO monotherapy in term neonates with hypoxic ischemic encephalopathy (HIE) is uncertain. STUDY DESIGN: Hundred term neonates with moderate or severe HIE were randomized by random permuted block algorithm to receive either EPO 500 U kg(-1) per dose in 2 ml saline intravenously (50 neonates) on alternate days for a total of five doses with the first dose given by 6 h of age (treatment group) or 2 ml of normal saline (50 neonates) similarly for a total of five doses (placebo group) in a double-blind study...
March 9, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28274172/preeclampsia-in-jordan-incidence-risk-factors-and-its-associated-maternal-and-neonatal-outcomes
#17
Yousef S Khader, Anwar Batieha, Rania Ali Al-Njadat, Sa'ad S Hijazi
OBJECTIVES: To estimate the incidence of preeclampsia among Jordanian pregnant women, determine its risk factors and its associated neonatal morbidity and mortality. METHODS: The study is a part of a comprehensive national study of perinatal mortality that was conducted in Jordan. This study included all women who gave birth in the selected hospitals during the study period. Maternal and medical conditions during pregnancy and neonatal outcomes were compared between women who developed preeclampsia and who did not...
March 8, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28274150/biochemical-and-clinical-predictors-of-hypoxic-ischemic-encephalopathy-after-perinatal-asphyxia
#18
Rebekka Jones, Axel Heep, David Odd
OBJECTIVE: To determine the usefulness of measures, available shortly after birth, as predictors of hypoxic-ischemic encephalopathy (HIE) following perinatal asphyxia. PATIENTS: All inborn patients at Southmead Hospital between January 2012 and March 2014 at ≥36 weeks gestation with a pH <7 or BE >16 on cord or baby's blood within one hour of birth or 10-minute Apgar score ≤5 or requiring intermittent positive pressure ventilation at 10 minutes were eligible for inclusion...
March 8, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28274014/urinary-uric-acid-creatinine-ratio-a-marker-for-perinatal-asphyxia
#19
Kinjal Prahaladbhai Patel, Mayur Goradhanbhai Makadia, Vishwal Indravardan Patel, Haridas Neelakandan Nilayangode, Somashekhar Marutirao Nimbalkar
BACKGROUND: Perinatal hypoxia is one of the leading causes of perinatal mortality in developing countries. Both apgar score and arterial blood pH predict the neonatal mortality in asphyxia. Apgar score alone does not predict neurologic outcome and as it is influenced by various factors. This study was conducted to evaluate the utility and sensitivity of urinary uric acid to creatinine ratio (UA/Cr ratio) in asphyxia diagnosis, compared to invasive Arterial Blood Gas (ABG) analysis. AIM: To assess the urinary uric acid/creatinine ratio as an additional marker for perinatal asphyxia compared with ABG analysis in apgar score monitoring...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28260850/the-role-of-serum-apelin-in-retinopathy-of-prematurity
#20
Yasser F Ali, Salah El-Morshedy, Abdulbasit Abdulhalim Imam, Nasser Ismai A Abdelrahman, Riad M Elsayed, Usama M Alkholy, Nermin Abdalmonem, Mohammed M Shehab
OBJECTIVE: To evaluate the role of serum apelin as a diagnostic tool in retinopathy of prematurity (ROP) disease. PATIENTS AND METHODS: Thirty-eight preterm infants (60% male) with gestational age ranging from 30 to 36 weeks admitted to the neonatal intensive care unit, KJO Hospital, Saudi Arabia with proven diagnosis of ROP were included in the study. In addition, 27 preterm infants without ROP served as controls. All newborn infants in the study were subjected to adequate history taking, full clinical examination, and fundus examination by indirect ophthalmoscope (at 4-6 weeks) as well as determination of serum apelin at birth and at 4-6 weeks of age...
2017: Clinical Ophthalmology
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