Local anesthetic choice

The superficial cervical plexus is an analgesic technique, without motor blockade.
Long-acting local anesthetics are typically used for carotid surgery, while short-acting agents are useful for superficial neck procedures such as node biopsy.

TIP: Apply and release pressure on the transducer to detect blood vessels before needle insertion, and rule out intravascular needle placement by frequent aspiration (every 2-3 mL).