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Hemorrhagic-ischemic cerebral injury in the preterm infant: current concepts
Lina Shalak1, Jeffrey M Perlman
1Department of Pediatrics, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas TX 75390-9063, USA.
Insights
Periventricular-intraventricular hemorrhage (PV-IVH) and white matter injury significantly impact premature infants. Current treatments reduce severe bleeds but don't guarantee long-term neurodevelopmental benefits, suggesting broader brain injury.
Area of Science:
- Neonatal neurology
- Perinatal brain injury
- Premature infant development
Background:
- Periventricular-intraventricular hemorrhage (PV-IVH) and adjacent white matter injury are critical issues in premature infants.
- Complex mechanisms, including blood flow dysregulation and cellular mediators like cytokines and excitotoxins, contribute to this injury.
Purpose of the Study:
- To investigate the mechanisms and long-term consequences of brain injury in premature infants.
- To evaluate the neurodevelopmental impact beyond severe intraventricular hemorrhage (IVH).
Main Methods:
- Analysis of injury mechanisms in premature infants.
- Assessment of neurodevelopmental outcomes following interventions for severe IVH.
Main Results:
- Indomethacin reduces severe IVH occurrence but does not ensure long-term neurodevelopmental benefits.
- This suggests a more widespread brain injury in sick premature infants than detectable by current neuroimaging.
Conclusions:
- The study highlights the limitations of current neuroimaging in assessing the full extent of brain injury in premature infants.
- A diffuse brain injury, not solely explained by severe PV-IVH, impacts neurodevelopmental outcomes in this population.
Abstract:
PV-IVH and adjacent white matter injury remains a significant problem in the premature infant. The potential mechanisms contributing to injury are complex and involve factors related to blood flow and its regulation, as well as cellular mediators including cytokines, free radical formation, and excitotoxin release. Although a reduction in the occurrence of severe IVH can be achieved with indomethacin, it does translate into long-term neurodevelopmental benefit. This reinforces the concept of a more diffuse injury to brain in sick premature infants than is apparent from the appearance of current neuroimaging techniques.