Dorsal column stimulation for control of pain

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Abstract
✓ Thirty patients with chronic intractable pain have had dorsal column implants and a trial of subsequent electrical self-stimulation to relieve the pain. Burning pain originating from damage to the CNS was most often relieved, while chronic bone, joint, and disc pain responded less well. Patients with severe psychiatric factors should be excluded, but preoperative selection is still difficult because of the lack of objective clinical tests. The long-term effect of the implant on the tissues of the dorsal column is still unknown and requires further evaluation. Although relief of pain has been reported for as long as 3 years, much longer follow-ups are necessary to evaluate the efficiency of this system in patients with chronic pain. Direct stimulation of the spinal cord raises a number of interesting questions in regard to perception and sensory phenomena in man but, as yet, there are no answers as to how dorsal column stimulation effects its relief of pain.
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