[Risk management in brachial plexus block].

Peripheral nerve block has many advantages in surgical anesthesia with or without general anesthesia; postoperative analgesia, faster postoperative rehabilitation, and chronic pain management. However, serious adverse complications after peripheral nerve block can happen. Therefore, anesthetists should obtain full informed consent for possible complications, and require scrupulous attention to this procedure. This review focuses on complications of brachial plexus block because it is the most popular peripheral nerve block.