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CBF and CBF/PCO2 reactivity in childhood strangulation
S Ashwal1, R M Perkin, J R Thompson
1Department of Pediatrics, Loma Linda University School of Medicine, California 92350.
Pediatric Neurology
|September 1, 1991
Summary
Cerebral blood flow (CBF) was normal in children with strangulation injuries, but their response to hyperventilation was impaired. This variability in CBF/PCO2 reactivity may worsen brain injury.
Area of Science:
- Pediatric neurology
- Neurocritical care
- Cerebral blood flow dynamics
Background:
- Strangulation injuries in children can lead to severe hypoxic-ischemic brain injury.
- Assessing cerebral blood flow (CBF) is crucial for managing these patients.
- Stable xenon computed tomography (XeCTCBF) is a method for determining CBF.
Observation:
- Four children with strangulation injuries underwent XeCTCBF within 24 hours of admission.
- All patients exhibited signs of severe hypoxic-ischemic cerebral injury, including apnea and bradyarrhythmias.
- Initial blood glucose and cardiac index values differed between survivors and non-survivors.
Findings:
- Total CBF was normal in all four children, with regional variations present.
- PCO2 reactivity, assessed via hyperventilation, showed marked regional variability.
- The CBF/PCO2 response was reduced in the two non-survivors compared to the survivors.
Implications:
- Despite normal CBF, impaired and variable PCO2 reactivity suggests potential for further brain injury.
- These findings highlight the importance of assessing CBF/PCO2 response in managing strangulation injuries.
- Understanding these dynamics is critical for determining the clinical utility of hyperventilation therapy.