Morbidity and mortality following carotid surgery.

Area of Science:

• Neurosurgery
• Vascular Surgery
• Neurology

Background:

• Carotid endarterectomy is a procedure to remove plaque from carotid arteries.
• Neurological and general complications are critical outcomes to monitor.
• Understanding complication timing and causes is essential for improving patient safety.

Purpose of the Study:

• To analyze neurological and general complications following carotid endarterectomy.
• To identify factors influencing complication rates, such as back-pressure limits and monitoring techniques.
• To evaluate the effectiveness of specific interventions in reducing adverse events.

Main Methods:

• Retrospective review of 920 carotid endarterectomy cases performed by a single surgeon (1976-1989).
• Detailed analysis of neurological symptom onset, type, and timing.
• Classification and quantification of complications including clamping ischemia, embolism, thrombosis, and hemorrhage.

Main Results:

• A cumulative stroke plus death rate of 3.1% was observed.
• Clamping ischemia incidence decreased by increasing the back-pressure safety limit from 40 to 50 mmHg.
• Intraoperative monitoring of Somatosensory Evoked Potentials (SEPs) reduced neurological complications to 1.4%.
• Intraoperative angiography reduced reoperation rates from 10% to 2%.

Conclusions:

• Optimizing back-pressure limits and utilizing intraoperative monitoring (SEPs) are crucial for minimizing clamping ischemia and neurological complications.
• Intraoperative angiography effectively reduces the need for reoperation.
• Antiplatelet drugs and meticulous surgical technique are vital for preventing embolic and thrombotic events.