[Case of two-stage carotid artery stenting managed with ultrasound-guided carotid sinus nerve block].

We report the use of ultrasound-guided carotid sinus nerve block for circulatory management during two-stage carotid artery stenting (CAS) in a patient with symptomatic carotid stenosis complicated with decreased cerebral perfusion reserve. The patient was a 70-year-old man with symptoms of ocular ischemia and markedly decreased perfusion of the left cerebral hemisphere observed in single photon emission computed tomography. Ultrasound-guided carotid sinus nerve block was conducted to prevent CAS perioperative circulatory fluctuations caused by carotid sinus reaction (CSR).