Once you are in the operating room and monitored, the anesthesiologist will administer medications to relax you. He then uses an ultrasound machine to locate a bundle of nerves, then using a very thin needle (it sounds much worse than it is) injects a local anesthetic near the nerves.
Some patients will receive a one-time injection in to the side of their neck–this is called a “single shot nerve block”. Some patients will receive what is called a “continuous nerve block” via a small catheter (tube) placed into the space to slowly drip local anesthetic medication after the surgery to help with pain control. The medication will be continuously delivered for at least the first 24 hours after surgery. Patients can expect varying degrees of pain control.
When your surgery is over, you may notice a few things: first, you likely will not be able to move or feel your shoulder, arm, and sometimes even your hand. Your voice may be hoarse. Your arm may feel tingly. All of these experiences are normal and will disappear as the nerve block wears off.