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Relief of pain by transcutaneous stimulation.

A series of 198 patients with chronic pain of diverse etiology was carefully analyzed for epidemiologic and descriptive factors which might influence the response to transcutaneous stimulation. The overall series included 12 1/2% with long-term success, and 68% with partial or short-term relief. There were no consistent specific diagnoses, or epidemiologic or descriptive factors that made good results from stimulation predictable. Stimulation of the painful area itself was not always necessary for pain relief. Favorable responses to transcutaneous stimulation were usually correlated with the continued existence of significant sensory input from the painful region. The authors conclude that transcutaneous stimulation is a valuable therapeutic modality for some patients with chronic pain.