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[Surgery of the internal carotid: locoregional or general anesthesia?].

AIM OF THE STUDY
The aim of this retrospective study was to assess the advantages of regional anesthesia over general anesthesia in carotid artery surgery.


PATIENTS AND METHOD
From January 1989 to December 1998, 670 patients with severe internal carotid artery stenosis were operated in the same center and were classified into two groups according to the type of anesthesia: group I, general anesthesia (n = 312) and group II, regional anesthesia (n = 358). Characteristics of the two groups were almost similar except for a higher rate of unstable heart disease in group I and bypass grafts in group II.


RESULTS
A shunt was used in 16.3% of cases in group I and in 8.4% in group II. Complications resulting from the use of a shunt and intraoperative complications observed with regional anesthesia were reported. There was a conversion from regional to general anesthesia in 6 patients. Median duration of clamping was longer in group II (30 min vs 25 min). Cardiac complication rates were similar in the two groups, particularly cardiac mortality (0.6%). There were more pulmonary and miscellaneous complications in group I. Neurological complications were more frequent in group I, particularly fatal strokes (1% versus 0%). Neurological mortality and morbidity cumulative rates were 3.1% and 1.5%, respectively, not significantly different.


CONCLUSION
These results, in agreement with those of the literature, confirm that carotid artery endarterectomy is associated with a low rate of neurological mortality and morbidity. Although regional anesthesia was associated with a lower rate of complications, we are not allowed to conclude to its superiority, as the present study was retrospective and the difference was not statistically significant.