Operating procedure
SCMM
LCM
The SGB procedures were performed under ultrasound guidance, and the operation was as follows. The patients were placed in the supine position, with their head turned to one side. A GE-LOGIQ5 ultrasonic diagnostic instrument was used for scanning, and the frequency of the ultrasonic probe was set to 10 MHz. Ultrasonic imaging was performed on the axial plane at the level of the cricoid cartilage, and the internal carotid artery and internal jugular vein were carefully distinguished. The stellate ganglion was located on the surface of the longus carotid muscle below the oblique internal carotid artery, and the 6th cervical vertebral body and the pretransverse tubercle stellate ganglion were punctured to a depth of 3.0-3.5 cm under ultrasound guidance, ensuring that no blood, cerebrospinal fluid or gas leaked, and 5 ml of 0.5% ropivacaine was infused slowly (Ultrasound-guided stellate ganglion block before and after. SCMM, sternocleidomastoid muscle; IJV, internal jugular vein; ICA, internal carotid artery; LCM, longus collimuscle.