Percutaneous diagnostic procedures are procedures performed to identify the source of pain and thus provide a better result with the surgical procedure. In some cases they also have therapeutic usefulness with which it is sought to control acute pain in patients who do not merit a surgical procedure at the time, or for chronic pain in older patients who do not want surgery. They are also useful in patients who have undergone a surgical procedure and have residual pain. In most cases they would be indicated and precede the surgery.