scholarly journals Current Controversies in Newer Therapies to Treat Birth Asphyxia

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Pia Wintermark
Keyword(s):  
Brain Injury ◽  
Neurological Outcome ◽  
Mild Hypothermia ◽  
Birth Asphyxia ◽  
Hypoxic Ischemic Encephalopathy ◽  
Monitoring Technology ◽  
The Past ◽  
Neuroprotective Strategy ◽  
Ischemic Encephalopathy

Despite major advances in monitoring technology and knowledge of fetal and neonatal pathophysiology, neonatal hypoxic-ischemic encephalopathy (HIE) remains one of the main causes of severe adverse neurological outcome in children. Until recently, there were no therapies other than supportive measures. Over the past several years, mild hypothermia has been proven to be safe to treat HIE. Unfortunately, this neuroprotective strategy seems efficient in preventing brain injury in some asphyxiated newborns, but not in all of them. Thus, there is increasing interest to rapidly understand how to refine hypothermia therapy and add neuroprotective or neurorestorative strategies. Several promising newer treatments to treat birth asphyxia and prevent its devastating neurological consequences are currently being tested. In this paper, the physiopathology behind HIE, the currently available treatment, the potential alternatives, and the next steps before implementation of these other treatments are reviewed.

Induced Hypothermia for Neonatal Hypoxic-Ischemic Encephalopathy: Pathophysiology, Current Treatment, and Nursing Considerations

2011 ◽  
Vol 30 (1) ◽  
pp. 29-36 ◽  
Author(s):  
DeLinda Jo Cooper
Keyword(s):  
Brain Injury ◽  
Healing Process ◽  
Current Treatment ◽  
Therapeutic Interventions ◽  
Hypoxic Ischemic Encephalopathy ◽  
Second Phase ◽  
Induced Hypothermia ◽  
Compensatory Mechanism ◽  
Neuroprotective Strategy ◽  
Ischemic Encephalopathy

AbstractHypoxic-ischemic encephalopathy (HIE) can lead to devastating neurodevelopmental consequences such as cerebral palsy, seizure disorders, and significant developmental delays. HIE in the newborn is often the result of a hypoxic event, such as uterine rupture, placental abruption, or cord prolapse. Biphasic brain injury occurs in HIE. The first phase involves activation of the sympathetic nervous system as a compensatory mechanism. The second phase, known as reperfusion brain injury, occurs hours later. Induced hypothermia, a neuroprotective strategy for treating HIE, targets the second phase to prevent reperfusion injury. NICU nurses are in a unique position to detect patient instability and to maintain the therapeutic interventions that contribute to the healing process. This article highlights the significant role nurses play in the management of infants diagnosed with HIE who are treated with induced hypothermia.

Neonates with hypoxic-ischemic encephalopathy treated with hypothermia: Observations in a large Canadian population and determinants of death and/or brain injury

2020 ◽  
Vol 13 (4) ◽  
pp. 449-458 ◽  
Author(s):  
E.H. Xu ◽  
M. Claveau ◽  
E.W. Yoon ◽  
K.J. Barrington ◽  
K. Mohammad ◽  
...  
Keyword(s):  
Brain Injury ◽  
Adverse Outcome ◽  
Large Population ◽  
Birth Asphyxia ◽  
Hypoxic Ischemic Encephalopathy ◽  
Risk Of Death ◽  
Canadian Population ◽  
Increased Risk ◽  
Initial Severity ◽  
Ischemic Encephalopathy

BACKGROUND: Birth asphyxia in term neonates remains a serious condition that causes significant mortality and long-term neurodevelopmental sequelae despite hypothermia treatment. The objective of this study was to review therapeutic hypothermia practices in a large population of neonates with hypoxic-ischemic encephalopathy (HIE) across Canada and to identify determinants of adverse outcome. METHODS: Our retrospective observational cohort study examined neonates≥36 weeks, admitted to the Canadian Neonatal Network NICUs between 2010 and 2014, diagnosed with HIE, and treated with hypothermia. Adverse outcome was defined as death and/or brain injury. Maternal, birth, and postnatal characteristics were compared between neonates with adverse outcome and those without. The association between the variables which were significantly different (p < 0.05) between the two groups and adverse outcome were further tested, while adjusting for gestational age, birth weight, gender, and initial severity of encephalopathy. RESULTS: A total of 2187 neonates were admitted for HIE; 52% were treated with hypothermia and 40% developed adverse outcome. Initial severity of encephalopathy (moderate, p = 0.006; severe, p < 0.0001), hypotension treated with inotropes (p = 0.001), and renal failure (p = 0.007) were significantly associated with an increased risk of death and/or brain injury. CONCLUSIONS: In asphyxiated neonates treated with hypothermia, not only their initial severity of encephalopathy on admission, but also their cardiac and renal complications during the first days after birth were significantly associated with risk of death and/or brain injury. Careful monitoring and cautious management of these complications is warranted.

Mapping the Knowledge Structure of Neonatal Hypoxic-Ischemic Encephalopathy Over the Past Decade

2015 ◽  
Vol 31 (6) ◽  
pp. 797-803 ◽  
Author(s):  
Jichong Huang ◽  
Jun Tang ◽  
Yi Qu ◽  
Li Zhang ◽  
Yan Zhou ◽  
...  
Keyword(s):  
Knowledge Structure ◽  
Hypoxic Ischemic Encephalopathy ◽  
The Past ◽  
Ischemic Encephalopathy

MRI IN HYPOXIC ISCHEMIC ENCEPHALOPATHY WITH CLINICAL FOLLOW UP

2021 ◽  
pp. 43-48
Author(s):  
M R Shashikumar ◽  
Narasipur Lingaiah Rajendrakumar ◽  
Sanjay P ◽  
Nanjaraj Chakenalli Puttaraj ◽  
Shruti Shruti ◽  
...  
Keyword(s):  
Clinical Outcome ◽  
Mr Imaging ◽  
Developmental Disorders ◽  
Brain Mri ◽  
Birth Asphyxia ◽  
Hypoxic Ischemic Encephalopathy ◽  
Preterm Neonates ◽  
Diffusion Restriction ◽  
Ischemic Encephalopathy

Introduction: HIE is often clinically suspected in the setting of a known perinatal stress event arising from a complicated or difcult delivery. The most sensitive and specic imaging technique for examining infants with suspected hypoxicischemic brain injury is MR imaging. It also gives information about the timing and specic patterns of injury and also suggest diagnoses other than HIE such as metabolic disorders and developmental disorders of the brain. MRI is also a useful tool in the determination of prognosis and also follow-up of HIE. Aim: This study was undertaken to evaluate the various MRI appearances of hypoxic ischemic encephalopathy in term and preterm neonates and to correlate the MRI appearances with clinical outcome. Materials and Methods: All neonates with history of birth asphyxia, referred for MRI examination to the Department of Radio-Diagnosis, K. R. Hospital attached to Mysore Medical College and Research Institute, during January 2018 to January 2019. All MRI scans were performed on GE optima MR360 1.5 Tesla. Sequences used were T1W axial, T1 FLAIR axial, T2W axial, T2 FLAIR axial, T1W sag, T2W coronal, T2W GRE axial, DWI axial and ADC maps. Results: 30 babies with clinically suspicion of HIE and positive ndings on MR imaging were evaluated in our study. Out of 30 babies, 18 were term and 12 babies were preterm. Periventricular luecomalacia is most common MRI pattern in preterm and central pattern in term neonates. 16 babies had abnormal developmental outcome at 6 months follow up study. 16 babies with diffusion restriction in corpus callosum, 12 had abnormal outcome. 7 out of 10 babies with loss of normal signal in internal capsule had abnormal outcome. Babies with diffusion restriction in basal ganglia had gross developmental delay. Conclusion: MRI is the modality of choice for evaluation of HIE because of excellent gray – white matter resolution, well-depiction of myelination pattern and multi-planar imaging capabilities. There is a strong relation between the MRI appearances of birth asphyxia and the clinical outcome. Therefore MRI has a strong role in prognosticating lesions.

scholarly journals Serum Biomarkers of MRI Brain Injury in Neonatal Hypoxic Ischemic Encephalopathy Treated With Whole-Body Hypothermia

2013 ◽  
Vol 14 (3) ◽  
pp. 310-317 ◽  
Author(s):  
An N. Massaro ◽  
Andreas Jeromin ◽  
Nadja Kadom ◽  
Gilbert Vezina ◽  
Ronald L. Hayes ◽  
...  
Keyword(s):  
Brain Injury ◽  
Serum Biomarkers ◽  
Hypoxic Ischemic Encephalopathy ◽  
Whole Body ◽  
Mri Brain ◽  
Ischemic Encephalopathy

scholarly journals Wavelet Autoregulation Monitoring Identifies Blood Pressures Associated With Brain Injury in Neonatal Hypoxic-Ischemic Encephalopathy

2021 ◽  
Vol 12 ◽  
Author(s):  
Xiuyun Liu ◽  
Aylin Tekes ◽  
Jamie Perin ◽  
May W. Chen ◽  
Bruno P. Soares ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Brain Injury ◽  
Therapeutic Hypothermia ◽  
Near Infrared ◽  
Brain Regions ◽  
Hypoxic Ischemic Encephalopathy ◽  
Volume Index ◽  
Arterial Blood ◽  
Blood Pressures ◽  
Ischemic Encephalopathy

Dysfunctional cerebrovascular autoregulation may contribute to neurologic injury in neonatal hypoxic-ischemic encephalopathy (HIE). Identifying the optimal mean arterial blood pressure (MAPopt) that best supports autoregulation could help identify hemodynamic goals that support neurologic recovery. In neonates who received therapeutic hypothermia for HIE, we hypothesized that the wavelet hemoglobin volume index (wHVx) would identify MAPopt and that blood pressures closer to MAPopt would be associated with less brain injury on MRI. We also tested a correlation-derived hemoglobin volume index (HVx) and single- and multi-window data processing methodology. Autoregulation was monitored in consecutive 3-h periods using near infrared spectroscopy in an observational study. The neonates had a mean MAP of 54 mmHg (standard deviation: 9) during hypothermia. Greater blood pressure above the MAPopt from single-window wHVx was associated with less injury in the paracentral gyri (p = 0.044; n = 63), basal ganglia (p = 0.015), thalamus (p = 0.013), and brainstem (p = 0.041) after adjustments for sex, vasopressor use, seizures, arterial carbon dioxide level, and a perinatal insult score. Blood pressure exceeding MAPopt from the multi-window, correlation HVx was associated with less injury in the brainstem (p = 0.021) but not in other brain regions. We conclude that applying wavelet methodology to short autoregulation monitoring periods may improve the identification of MAPopt values that are associated with brain injury. Having blood pressure above MAPopt with an upper MAP of ~50–60 mmHg may reduce the risk of brain injury during therapeutic hypothermia. Though a cause-and-effect relationship cannot be inferred, the data support the need for randomized studies of autoregulation and brain injury in neonates with HIE.

scholarly journals Neurodevelopmental outcome of babies with hypoxic ischemic encephalopathy

2017 ◽  
Vol 5 (7) ◽  
pp. 3197
Author(s):  
Sirajuddin Nazeer ◽  
Senthilkumar K. ◽  
Thangavel A. ◽  
Uma Maheswari M.
Keyword(s):  
Neurological Outcome ◽  
Neurodevelopmental Outcome ◽  
Hypoxic Ischemic Encephalopathy ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Mri Brain ◽  
Early Markers ◽  
Cdc Grading ◽  
Ischemic Encephalopathy

Background: The aim of the study was to find out the neurodevelopmental outcome of babies with hypoxic ischemic encephalopathy at 6 months of age and to predict early markers of abnormal neurological outcome in those babies.Methods: 50 babies admitted with hypoxic ischemic encephalopathy were enrolled in this prospective study and followed up at 3 and 6 months of age at Mahatma Gandhi Memorial Government Hospital, Trichy. The neurological outcome of the babies was assessed by CDC grading of motor milestones, Trivandrum development screening chart, Amiel Tison angles head circumference and weight measured. USG cranium was done for all the babies and MRI brain was done in babies with abnormal neuro sonogram and abnormal outcome. Vision and hearing were tested clinically.Results: The incidence of abnormal neurological outcome was 14%. The early markers predicting abnormal neurological sequele are identified.Conclusions: Early identification of abnormal neuro behaviour helps in starting early intervention to improve the long term outcome.

Hypoxic Ischemic Encephalopathy in Neonates with Birth Asphyxia - A Hospital Based Study

2021 ◽  
Vol 18 (2) ◽  
pp. 22-26
Author(s):  
Jyoti Adhikari ◽  
Deepak Paudel
Keyword(s):  
Birth Asphyxia ◽  
College Teaching ◽  
Hypoxic Ischemic Encephalopathy ◽  
Obstructed Labor ◽  
Female Ratio ◽  
Live Births ◽  
Normal Birth ◽  
Risk Pregnancy ◽  
Clinical Presentations ◽  
Ischemic Encephalopathy

Introduction: Each year approximately 4 million babies are born asphyxiated, which results in 1 million deaths and an equal number of serious neurological sequelae. One of the commonest organs involved in birth asphyxia is brain which may lead to a syndrome of clinical manifestation called Hypoxic Ischemic Encephalopathy (HIE). Aims: To find out possible maternal and neonatal risk factors for Hypoxic Ischemic Encephalopathy, to analyze clinical presentations and outcome of HIE in asphyxiated newborns. Methods: Hospital based observational study was carried out among fifty newborns with Apgar score less than 7 at 1 minute of life admitted in Nepalgunj Medical College Teaching Hospital, Kohalpur, Banke. Results: The incidence of birth asphyxia and birth asphyxia with HIE were 37.2 per 1000 live births and 14 per 1000 live births with male: female ratio of 1.27:1. Most of the neonates 22(44%) were in HIE stage II. Meconium stained amniotic fluid 18 (36%) was the most common intrapartum risk factor followed by maternal use of intrapartum medications 14 (28%), Premature Rupture of Membrane (PROM) 8 (16%), prolonged labor 5 (10%) and obstructed labor 6 (12%). Four (8%) asphyxiated neonates with HIE had cord prolapse and 7 (14%) had cord around the neck. The most common resuscitation done was bag and mask ventilation (56%) (P<0.05). Majority of the studied neonates were of normal birth weight (76%) and head circumference (84%) (P<0.05) with clinical presentations of respiratory distress (88%), seizures (44%), apnea (22%), bradycardia (8%), tachycardia (6%) and bulged anterior fontanel (6%). The overall mortality of neonates with HIE was 20% of which most were of HIE stage III. Conclusion: Certain measures could be taken to prevent birth asphyxia: early detection and intervention of high risk pregnancy, prompt and effective resuscitation of asphyxiates newborns.

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