Carotid endarterectomy without a shunt: the control series

Area of Science:

• Vascular Surgery
• Neurology
• Clinical Outcomes

Background:

• Carotid endarterectomy (CEA) is a common procedure to prevent stroke.
• The use of temporary shunts during CEA is debated.
• Neurologic complications remain a concern after CEA.

Purpose of the Study:

• To evaluate the risk of neurologic complications during CEA performed without a temporary shunt.
• To identify specific patient factors associated with increased neurologic risk.
• To determine the combined effect of low carotid back pressure and contralateral carotid artery occlusion on stroke risk.

Main Methods:

• Retrospective analysis of 940 carotid endarterectomies performed without shunts.
• Correlation of neurologic complications (stroke, transient neurologic symptoms) with carotid back pressure, contralateral internal carotid artery status, and preoperative deficits.
• Statistical analysis to assess the impact of individual and combined risk factors.

Main Results:

• Overall stroke rate was 2.4% (6 deaths, 17 non-fatal strokes).
• Neurologic complications significantly increased with systolic carotid back pressure ≤ 50 mm Hg or contralateral carotid artery occlusion.
• The highest rate of permanent deficit (11.0%) occurred when both low back pressure and contralateral occlusion were present.

Conclusions:

• Performing CEA without a shunt carries an increased risk of neurologic complications in patients with both low carotid back pressure and contralateral carotid artery occlusion.
• The combination of these two factors significantly elevates the risk of permanent neurologic deficit.
• Consideration of a temporary shunt in patients with these combined risk factors may be beneficial to reduce complications.