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Predicting cerebral ischemia during carotid endarterectomy
Archives of Surgery (Chicago, Ill. : 1960)
|May 1, 1986
Summary
Preoperative stroke, intracranial disease, and contralateral carotid stenosis significantly increase the risk of intraoperative cerebral ischemia during carotid endarterectomy. A predictive equation aids in assessing this risk when electroencephalographic monitoring is unavailable.
Area of Science:
- Neurology
- Vascular Surgery
- Neurophysiology
Background:
- Carotid endarterectomy is a common procedure to prevent stroke.
- Intraoperative cerebral ischemia is a significant risk during carotid endarterectomy.
- Predicting this risk preoperatively can optimize patient management.
Purpose of the Study:
- To identify preoperative clinical and angiographic predictors of intraoperative cerebral ischemia during carotid endarterectomy.
- To develop a risk stratification model for intraoperative cerebral ischemia.
Main Methods:
- Retrospective review of 86 patients undergoing elective carotid endarterectomy.
- Continuous electroencephalographic (EEG) monitoring with Berg-Fourier transformation.
- Analysis of preoperative clinical data, angiographic findings, and intraoperative EEG changes.
Main Results:
- A history of stroke within six weeks increased ischemia risk 20-fold.
- Intracranial disease and contralateral carotid stenosis increased ischemia risk 17-fold and 16-fold, respectively.
- A probability equation accurately quantified preoperative risk for EEG changes.
Conclusions:
- Preoperative factors, including recent stroke, intracranial disease, and contralateral carotid stenosis, are significant predictors of intraoperative cerebral ischemia.
- A developed probability equation can aid in preoperative risk assessment for cerebral ischemia.
- This predictive model may assist in surgical decision-making, particularly when EEG monitoring is not feasible.