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Brain injury in the premature infant. Neuropathology, clinical aspects, pathogenesis, and prevention
1Department of Neurology, Harvard Medical School, Boston, Massachusetts, USA.
Insights
Preventing brain injury in premature infants involves targeting two main lesions: periventricular hemorrhagic infarction and periventricular leukomalacia. Advances in technology and understanding offer new hope for preventing these serious conditions.
Area of Science:
- Neonatal neurology
- Pediatric neurosurgery
- Developmental neuroscience
Background:
- Premature infants are susceptible to brain injury, leading to significant neurologic deficits.
- Two primary lesions, periventricular hemorrhagic infarction and periventricular leukomalacia, are implicated in neonatal brain injury.
- Current understanding suggests potential pathways for preventing these lesions.
Purpose of the Study:
- To review the principal lesions underlying brain injury in premature infants.
- To explore potential preventive strategies for periventricular hemorrhagic infarction and periventricular leukomalacia.
- To highlight the role of emerging technologies and cellular insights in neonatal brain injury prevention.
Main Methods:
- Literature review of studies on neonatal brain injury.
- Analysis of preventive strategies for germinal matrix-IVH and impaired cerebrovascular regulation.
- Discussion of technological advancements like near-infrared spectroscopy.
- Exploration of cellular mechanisms of oligodendroglial vulnerability.
Main Results:
- Periventricular hemorrhagic infarction may be prevented by addressing germinal matrix-IVH.
- Periventricular leukomalacia prevention may involve detecting impaired cerebrovascular regulation using near-infrared spectroscopy.
- Free-radical scavengers and prenatal magnesium sulfate are potential therapeutic agents.
- Significant progress has been made in preventing periventricular hemorrhagic infarction.
Conclusions:
- Both periventricular hemorrhagic infarction and periventricular leukomalacia are potentially preventable neonatal brain injuries.
- Near-infrared spectroscopy and understanding oligodendroglial vulnerability offer promising avenues for preventing periventricular leukomalacia.
- Continued research and technological advancements are crucial for improving outcomes in premature infants.
Abstract:
There are two principal lesions that underlie brain injury and the neurologic manifestations in the premature infant: periventricular hemorrhagic infarction and periventricular leukomalacia. Both of these lesions may be potentially preventable: periventricular hemorrhagic infarction by preventing germinal matrix-IVH, and periventricular leukomalacia by detecting impaired cerebrovascular regulation with near-infrared spectroscopy, preventing the impaired cerebral blood flow and interrupting the cascade to oligodendroglial cell death, perhaps by such agents as free-radical scavengers. Prenatal magnesium sulfate also may be valuable. The greatest progress toward prevention has been made regarding periventricular hemorrhagic infarction, but the advent of new technologies, especially near-infrared spectroscopy, and of new insights into the cellular basis for oligodendroglial vulnerability provide hope for prevention of periventricular leukomalacia.