Dorsal Column Stimulation is a pain-relief technique that delivers a low-voltage electrical current continuously to the spinal cord to block the sensation of pain. This technique is used to treat chronic pain that is not the result of an ongoing injury. If it is determined that the patient is a suitable candidate for Dorsal Column Stimulation, often the first step is to implant a device on a trial basis. If the trial provides adequate pain relief, then a permanent system may be implanted. This treatment is commonly used for the following conditions: Arachnoiditis, Complex regional pain syndrome, Failed-back surgery syndrome, post-laminectomy syndrome, or Nerve damage.