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Blood flow and ischemia within traumatic cerebral contusions
Gorm von Oettingen1, Bo Bergholt, Carsten Gyldensted
1Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark. von_oettingen@dadlnet.dk
Neurosurgery
|March 21, 2002
Summary
Severe traumatic brain injuries show irreversible ischemia in cerebral contusions. The pericontusional zone has low blood flow, risking secondary ischemic events similar to stroke.
Area of Science:
- Neurology
- Radiology
- Traumatic Brain Injury
Background:
- Severe traumatic brain injuries (TBIs) can cause cerebral contusions.
- Understanding tissue viability in the pericontusional zone is crucial for patient outcomes.
Purpose of the Study:
- To provide evidence of irreversible ischemia in cerebral contusions.
- To clarify the potential tissue viability in the pericontusional zone of severe TBIs.
Main Methods:
- Quantitative regional cerebral blood flow (rCBF) measurements using xenon-enhanced computed tomography (CT).
- Image fusion to correlate rCBF with contusion areas.
- Statistical correlation of acute-phase rCBF with late-phase tissue necrosis (focal atrophy on follow-up CT scans).
Main Results:
- All 26 contusions in 17 patients progressed to focal atrophic areas.
- Mean rCBF in contusions was 5.9 ml/100 g/min, indicating severe ischemia.
- Contusions showed a core of lethal ischemia with surrounding areas of gradually increasing perfusion.
Conclusions:
- Cerebral contusions exhibit a distinct ischemic profile with a pericontusional zone of low rCBF.
- This pericontusional zone carries a risk of secondary ischemic insults.
- The risk is comparable to ischemic penumbra surrounding acute ischemic stroke.