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Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Neurologic outcome of prematurity
1Harvard Medical School and Children's Hospital, Boston, Mass 02115, USA. volpe_j@a1.tch.harvard.edu
Insights
Preventing brain injury in premature infants is achievable. Strategies include avoiding germinal matrix-intraventricular hemorrhage and managing impaired cerebral blood flow to prevent periventricular leukomalacia.
Area of Science:
- Neonatal neurology
- Pediatric neuropathology
Background:
- Brain injury is a significant concern in premature infants.
- Key lesions include periventricular hemorrhagic infarction and periventricular leukomalacia.
- These lesions cause subsequent neurological deficits.
Purpose of the Study:
- To review neuropathological features, pathogenesis, and prevention strategies for two main brain lesions in premature infants.
- To highlight recent advancements suggesting lesion prevention is possible.
Main Methods:
- Review of neuropathological findings.
- Analysis of pathogenetic mechanisms.
- Evaluation of potential preventative interventions.
Main Results:
- Periventricular hemorrhagic infarction may be prevented by avoiding germinal matrix-intraventricular hemorrhage.
- Periventricular leukomalacia prevention involves detecting impaired cerebrovascular autoregulation and cerebral blood flow.
- Interrupting oligodendroglial cell death pathways, possibly with free radical scavengers, is a target for periventricular leukomalacia.
Conclusions:
- Prevention of germinal matrix-intraventricular hemorrhage can reduce periventricular hemorrhagic infarction.
- Targeting cerebrovascular regulation and cell death pathways offers hope for preventing periventricular leukomalacia.
- Achieving lesion prevention in premature infants is a realistic goal.
Abstract:
Brain injury in the premature infant is an extremely important problem, in part because of the large absolute number of infants affected yearly. The 2 principal brain lesions that underlie the neurological manifestations subsequently observed in premature infants are periventricular hemorrhagic infarction and periventricular leukomalacia. The emphases of this article are the neuropathological features, pathogenesis, and potential means of prevention of these 2 lesions. Recent work suggests that the ultimate goal, prevention of the lesions, is potentially achievable. Periventricular hemorrhagic infarction may be avoidable by prevention of germinal matrix-intraventricular hemorrhage, and periventricular leukomalacia by detection of impaired cerebrovascular autoregulation, prevention of impaired cerebral blood flow, and interruption of the cascade to oligodendroglial cell death by such agents as free radical scavengers.
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