Amazon.com description: Product Description: This book is a succinct, practical, clinically-based guide to nerve blocking techniques that are available in current practice. A nerve block is the injection of either a local anesthetic or a drug that inactivates nerves to control otherwise uncontrollable pain. Nerve blocks can be used to determine the source of pain, to treat painful conditions that respond to nerve blocks, to predict how the pain will respond to long-term treatments, and to prevent pain following procedures.