Cerebral protection in carotid surgery

Area of Science:

• Vascular Surgery
• Neurology
• Anesthesiology

Background:

• Carotid endarterectomy is a common procedure to prevent stroke.
• Cervical block anesthesia is used in conscious patients undergoing this surgery.
• Understanding perioperative stroke mechanisms and risk factors is crucial for improving patient outcomes.

Purpose of the Study:

• To analyze the mechanisms of perioperative strokes following carotid endarterectomy.
• To identify risk factors associated with perioperative strokes in this patient population.
• To evaluate the accuracy of regional block monitoring in relation to anesthetic technique.

Main Methods:

• Retrospective analysis of 956 carotid endarterectomies performed on 661 conscious patients under cervical block anesthesia.
• Detailed examination of 23 patients who experienced perioperative strokes to determine the cause.
• Stratification of stroke rates based on patient characteristics and surgical conditions.

Main Results:

• The overall perioperative stroke rate was 2.5%.
• Stroke causes included technical problems (50%), intraoperative embolization (25%), and intracerebral hemorrhage (16.7%).
• Highest stroke rates (up to 28.4%) were observed in patients with contralateral carotid occlusion, preoperative neurological deficits, or intolerance to carotid clamping.

Conclusions:

• Technical issues and embolization are significant contributors to perioperative strokes after carotid endarterectomy.
• Specific patient factors and surgical challenges increase stroke risk.
• Standardized reporting is essential for comparing cerebral protection techniques and risk stratification.