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Lee KS, Massaro A, Wintermark P, Soul J, Natarajan G, Dizon MLV, Mietzsch U, Mohammad K, Wu TW, Chandel A, Shenberger J, DiGeronimo R, Peeples ES, Hamrick S, Cardona VQ, Rao R. Practice Variations for Therapeutic Hypothermia in Neonates with Hypoxic-ischemic Encephalopathy: An International Survey. J Pediatr 2024; 274:114181. [PMID: 38950817 DOI: 10.1016/j.jpeds.2024.114181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 06/06/2024] [Accepted: 06/25/2024] [Indexed: 07/03/2024]
Abstract
OBJECTIVE To evaluate variations in management of therapeutic hypothermia (TH) for neonatal hypoxic-ischemic encephalopathy (HIE) among international clinical sites and to identify areas for harmonization. STUDY DESIGN An electronic survey was sent to Children's Hospitals Neonatal Consortium site sponsors, Canadian Neonatal Network site investigators, members of the Newborn Brain Society, and American Academy of Pediatrics Neonatology chiefs. RESULTS One hundred five sites responded, with most from high-income regions (n = 95). Groupings were adapted from the United Nations regional groups: US (n = 52 sites); Canada (n = 20); Western Europe and other states excluding Canada and US Group (WEOG, n = 18); and non-WEOG (central and eastern Europe, Asia, Africa, Latin America, and Caribbean, n = 15). Regional variations were seen in the eligibility criteria for TH, such as the minimum gestational age, grading of HIE severity, use of electroencephalography, and the frequency of providing TH for mild HIE. Active TH during transport varied among regions and was less likely in smaller volume sites. Amplitude-integrated electroencephalogram and/or continuous electroencephalogram to determine eligibility for TH was used by most sites in WEOG and non-WEOG but infrequently by the US and Canada Groups. For sedation during TH, morphine was most frequently used as first choice but there was relatively high (33%) use of dexmedetomidine in the US Group. Timing of brain magnetic resonance imaging and neurodevelopmental follow-up were variable. Neurodevelopmental follow occurred earlier and more frequently, although for a shorter duration, in the non-WEOG. CONCLUSIONS We found significant variations in practices for TH for HIE across regions internationally. Future guidelines should incorporate resource availability in a global perspective.
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Affiliation(s)
- Kyong-Soon Lee
- Division of Neonatology, the Hospital for Sick Children, Department of Paediatrics, University of Toronto, Canada.
| | - An Massaro
- Division of Neonatology, Children's National Hospital, Department of Pediatrics, The George Washington School of Medicine, Washington, DC
| | - Pia Wintermark
- Division of Newborn Medicine, Department of Pediatrics, Montreal Children's Hospital, Research Institute of the McGill University Health Centre, McGill University, Montreal, Canada
| | - Janet Soul
- Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Girija Natarajan
- Children's Hospital of Michigan/Wayne State University, Detroit, MI
| | - Maria L V Dizon
- Division of Neonatology, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL
| | - Ulrike Mietzsch
- Division of Neonatology, Department of Pediatrics, University of Washington/Seattle Children's Hospital, Seattle, WA
| | - Khorshid Mohammad
- Department of Pediatrics, Section of Newborn Critical Care, University of Calgary, Cumming School of Medicine, Alberta Children's Hospital, Calgary, Canada
| | - Tai-Wei Wu
- Fetal and Neonatal Institute, Division of Neonatology, Children's Hospital Los Angeles, Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, CA
| | - Amit Chandel
- Atrium Health Wake Forest Baptist, Winston-Salem, NC
| | | | - Robert DiGeronimo
- Division of Neonatology, Seattle Children's Hospital, University of Washington, Seattle, WA
| | - Eric S Peeples
- Division of Neonatology, Department of Pediatrics, Children's Nebraska, University of Nebraska Medical Center, Omaha, NE
| | - Shannon Hamrick
- Emory University and Children's Healthcare of Atlanta, Atlanta GA
| | | | - Rakesh Rao
- Division of Newborn Medicine, Department of Pediatrics, Washington University in St. Louis, St. Louis, MO
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Chalak L. New Horizons in Mild Hypoxic-ischemic Encephalopathy: A Standardized Algorithm to Move past Conundrum of Care. Clin Perinatol 2022; 49:279-294. [PMID: 35210007 DOI: 10.1016/j.clp.2021.11.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Hypoxic-ischemic encephalopathy (HIE) presents clinically with a neonatal encephalopathy (NE) whereby the mild spectrum is difficult to classify immediately after birth. For decades trials have focused exclusively on infants with moderate-severe HIE s, as these infants were easier to identify after birth and had the highest risk of adverse outcomes. Twenty years after those trials, the PRIME study finally solved the first part of the conundrum by providing a definition of mild HIE in the first 6 hours. There is strong biological plausibility and preclinical evidence supporting the efficacy of therapeutic hypothermia (TH) but there is a lack of comparative clinical data to establish the risk-benefit in mild HIE. The fundamental question of how best to manage mild HIE remains unanswered. This review will summarize (1) the evidence that neonates with mild HIE are at significant risk for adverse outcomes, (2) the gaps/controversies in management, and (3) an algorithm of care is proposed to ensure standardized management of mild HIE and the direction of future trials.
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Affiliation(s)
- Lina Chalak
- Neonatal-Perinatal Medicine, University of Texas Southwestern Medical School, 5323 Harry Hines Boulevard, Dallas, TX 75390-9063, USA.
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Natique KR, Das Y, Maxey MN, Sepulveda P, Brown LS, Chalak LF. Early Use of Transcranial Doppler Ultrasonography to Stratify Neonatal Encephalopathy. Pediatr Neurol 2021; 124:33-39. [PMID: 34509001 DOI: 10.1016/j.pediatrneurol.2021.07.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 06/28/2021] [Accepted: 07/03/2021] [Indexed: 12/25/2022]
Abstract
BACKGROUND The dynamic nature of neonatal hypoxic-ischemic encephalopathy (HIE) after birth necessitates reliable biomarkers to identify infants with evolving brain injury. This prospective cohort aims to use serial Doppler ultrasonography (US) to measure cerebral blood flow velocity and resistance index (RI) to help detect the time and evolution of the clinical encephalopathy. METHODS A total of 60 neonates were enrolled all ≥36 weeks' gestation with perinatal acidemia, defined as a blood gas pH ≤ 7.0 or base deficit ≥16 mmol/L and encephalopathy including a matched control group without encephalopathy. Each neonate received one to three serial Doppler recordings starting at six to 24 hours of life. Mean RI ≤ 0.55 was considered abnormal. RESULTS Mean RIs obtained shortly after birth were significantly lower with increasing severity of encephalopathy. On the first Doppler recordings, abnormal mean RIs were seen in 11 of 18 (61%) neonates with mild, 13 of 17 (76%) with moderate, and two of two (100%) with severe HIE. Of the neonates with mild HIE and abnormal mean RIs, congruity abnormal amplitude electroencephalography (45%), brain magnetic resonance imaging (45%), and abnormal head ultrasound (44%) are here reported. CONCLUSIONS Doppler measurements can provide bedside adjunct biomarkers indicating the time and severity of neonatal HIE.
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Affiliation(s)
- Kiran R Natique
- Neonatal-Perinatal Medicine, University of Texas Southwestern, Dallas, Texas
| | - Yudhajit Das
- Department of Biomedical Engineering, University of Texas, Arlington, Texas
| | | | | | | | - Lina F Chalak
- Neonatal-Perinatal Medicine, University of Texas Southwestern, Dallas, Texas.
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Abstract
Hypoxic-ischemic encephalopathy is a subtype of neonatal encephalopathy and a major contributor to global neonatal morbidity and mortality. Despite advances in obstetric and neonatal care there are still challenges in accurate determination of etiology of neonatal encephalopathy. Thus, identification of intrapartum risk factors and comprehensive evaluation of the neonate is important to determine the etiology and severity of neonatal encephalopathy. In developed countries, therapeutic hypothermia as a standard of care therapy for neonates with hypoxic-ischemic encephalopathy has proven to decrease incidence of death and neurodevelopmental disabilities, including cerebral palsy in surviving children. Advances in neuroimaging, brain monitoring modalities, and biomarkers of brain injury have improved the ability to diagnose, monitor, and treat newborns with encephalopathy. However, challenges remain in early identification of neonates at risk for hypoxic-ischemic brain injury, and determination of the timing and extent of brain injury. Using imaging studies such as Neonatal MRI and MR spectroscopy have proven to be most useful in predicting outcomes in infants with encephalopathy within the first week of life, although comprehensive neurodevelopmental assessments still remains the gold standard for determining long term outcomes. Future studies are needed to identify other newborns with encephalopathy that might benefit from therapeutic hypothermia and to determine the efficacy of other adjunctive neuroprotective strategies. This review focuses on newer evidence and advances in diagnoses and management of infants with neonatal encephalopathy, including novel therapies, as well as prognostication of outcomes to childhood.
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