Brachial plexus nerve block anesthesia is one of the nerve block anesthesia and belongs to local anesthesia. The anesthesiologist chooses different puncture sites depending on the patient’s surgical site, including interosseous groove, axilla, supraclavicular, subclavicular, etc. The choice of puncture site varies, and the block anesthesia site is slightly different, but overall it is anesthesia for the upper extremity. As an example, the interosseous groove, where a nerve block is done at the middle posterior border of the sternocleidomastoid muscle, allows for surgery on the upper arm including part of the shoulder joint. To perform hand surgery, the axilla is generally chosen for nerve block anesthesia. In general, the onset of brachial plexus anesthesia is 10-20 min, and the onset of effect varies with age. The onset of action is faster in the elderly and slower in the young. Although the onset of action is faster in the elderly, the duration of action is longer than that of the young. This is due to the high sensitivity of the elderly to local anesthetics.