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Open Access Research article

The Vermont oxford neonatal encephalopathy registry: rationale, methods, and initial results

Robert H Pfister12*, Peter Bingham17, Erika M Edwards12, Jeffrey D Horbar127, Michael J Kenny12, Terrie Inder37, Karin B Nelson457, Tonse Raju67 and Roger F Soll127

Author affiliations

1 University of Vermont, Burlington, VT, USA

2 Vermont Oxford Network, Burlington, VT, USA

3 Washington University, St Louis, MO, USA

4 National Institute of Neurological Disorders and Stroke, Bethesda, MD, USA

5 Children's Hospital National Medical Center, Washington, DC, USA

6 National Institute of Child Health and Human Development, Bethesda, MD, USA

7 Vermont Oxford Network Neonatal Encephalopathy Registry Steering Committee Member, Burlington, USA

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Citation and License

BMC Pediatrics 2012, 12:84  doi:10.1186/1471-2431-12-84

Published: 22 June 2012

Abstract

Background

In 2006, the Vermont Oxford Network (VON) established the Neonatal Encephalopathy Registry (NER) to characterize infants born with neonatal encephalopathy, describe evaluations and medical treatments, monitor hypothermic therapy (HT) dissemination, define clinical research questions, and identify opportunities for improved care.

Methods

Eligible infants were ≥ 36 weeks with seizures, altered consciousness (stupor, coma) during the first 72 hours of life, a 5 minute Apgar score of ≤ 3, or receiving HT. Infants with central nervous system birth defects were excluded.

Results

From 2006–2010, 95 centers registered 4232 infants. Of those, 59% suffered a seizure, 50% had a 5 minute Apgar score of ≤ 3, 38% received HT, and 18% had stupor/coma documented on neurologic exam. Some infants experienced more than one eligibility criterion. Only 53% had a cord gas obtained and only 63% had a blood gas obtained within 24 hours of birth, important components for determining HT eligibility. Sixty-four percent received ventilator support, 65% received anticonvulsants, 66% had a head MRI, 23% had a cranial CT, 67% had a full channel encephalogram (EEG) and 33% amplitude integrated EEG. Of all infants, 87% survived.

Conclusions

The VON NER describes the heterogeneous population of infants with NE, the subset that received HT, their patterns of care, and outcomes. The optimal routine care of infants with neonatal encephalopathy is unknown. The registry method is well suited to identify opportunities for improvement in the care of infants affected by NE and study interventions such as HT as they are implemented in clinical practice.

Keywords:
Hypoxic ischemic encephalopathy; Neonatal encephalopathy; HIE; Therapeutic hypothermia; Asphyxia; Cooling; Neuroprotection; Neonatal encephalopathy; Registry