Related Experiment Video
Updated: Sep 3, 2025
Non-invasive Optical Measurement of Cerebral Metabolism and Hemodynamics in Infants
Published on: March 14, 2013
Cerebral Oxygenation and Metabolism After Hypoxia-Ischemia
Simerdeep K Dhillon1, Eleanor R Gunn1, Benjamin A Lear1
1Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.
Insights
Perinatal hypoxia-ischemia (HI) brain injury evolves over time, impacting infant neurodevelopment. Monitoring cerebral oxygenation and metabolism offers vital prognostic biomarkers for guiding treatment and improving outcomes.
Area of Science:
- Neuroscience
- Neonatal Medicine
- Pediatric Neurology
Background:
- Perinatal hypoxia-ischemia (HI) significantly contributes to mortality and neurodevelopmental issues in infants.
- HI brain injury is a dynamic process involving protective and pathological interactions over hours to days.
- Understanding injury evolution timing is crucial for effective therapeutic strategies.
Purpose of the Study:
- To review evidence on changes in cerebral oxygenation and metabolism post-HI.
- To explore the utility of these changes as prognostic biomarkers.
- To discuss the impact of clinical management on neuroprotection.
Main Methods:
- Review of recent scientific literature and evidence.
- Analysis of neurophysiological profiles, cerebral perfusion, and oxygenation patterns post-HI.
- Examination of altered neurovascular coupling and cerebral autoregulation.
Main Results:
- Post-HI recovery shows specific neurophysiological changes, including altered cerebral perfusion and oxygenation.
- A delayed reduction in cerebral perfusion is followed by secondary deterioration with hyperperfusion.
- These perfusion changes correlate with injury evolution stages and severity.
Conclusions:
- Changes in cerebral oxygenation and metabolism following HI are potential biomarkers for prognosis.
- Optimizing clinical management may enhance neuroprotection during critical early periods.
- Further research into these biomarkers can guide therapeutic interventions for better infant outcomes.
Abstract:
Perinatal hypoxia-ischemia (HI) is still a significant contributor to mortality and adverse neurodevelopmental outcomes in term and preterm infants. HI brain injury evolves over hours to days, and involves complex interactions between the endogenous protective and pathological processes. Understanding the timing of evolution of injury is vital to guide treatment. Post-HI recovery is associated with a typical neurophysiological profile, with stereotypic changes in cerebral perfusion and oxygenation. After the initial recovery, there is a delayed, prolonged reduction in cerebral perfusion related to metabolic suppression, followed by secondary deterioration with hyperperfusion and increased cerebral oxygenation, associated with altered neurovascular coupling and impaired cerebral autoregulation. These changes in cerebral perfusion are associated with the stages of evolution of injury and injury severity. Further, iatrogenic factors can also affect cerebral oxygenation during the early period of deranged metabolism, and improving clinical management may improve neuroprotection. We will review recent evidence that changes in cerebral oxygenation and metabolism after HI may be useful biomarkers of prognosis.
