RESUMO
BACKGROUND: The best regional anesthesia plan with the best clinical results for Carotid endarterectomy (CEA) has not been defined yet. METHODS: Prospective multicentric observational study of two non-randomized matched cohorts including patients undergoing elective unilateral CEA (N.=100) between January-October 2021. Main outcomes were cerebral oximetry measurements, verbal numeric pain score assessment, peripheral nerve blockades and in-hospital stay. The main objective is to compare results achieved after carotid endarterectomy (CEA) performed under loco-regional blockade (LRB) versus general anesthesia (GA), in terms of intraoperative hemodynamic and neurologic variability. Patients undergoing LRB were performed under ultrasound (US) guidance and mild sedation. RESULTS: The LRB and GA groups showed no differences in comorbidities and risk factors. However, there was a significant difference in the intraoperative hemodynamic behavior due to the amount of vasoactive drugs used (0% vs. 16% for phenylephrine, P=0.006). The results showed neurological stability through the cerebral oximetry measurements during the procedure except for the left hemisphere de-clamp values, which were higher in the GA group (68.7±9.9 vs. 72.7±8.8; P=0.035). There were also significant differences in the verbal pain scale scores assessed 6 hours and 12 hours after the procedure; better pain control was evidenced in the LRB group (0[0-1] vs. 1[0-3], P=0.01; 1[0.5-2] vs. 0[0-2], P=0.01). An increased transient hypoglossal and laryngeal nerves blockade was observed in the LRB group (30% vs. 4%; P<0.001). The in-hospital length of stay was longer in the GA group (77.2±36.3 hours vs. 129.1±41.1 hours; P<0.001). CONCLUSIONS: Although the use of intermediate-deep cervical plexus blockade for CEA confers similar neurologic stability as GA does, there is a difference on the hemodynamic behaviour due to the differences in vasoactive drug consumption. Loco-regional techniques provide a better postoperative pain control and shorten in-hospital length of stay.
