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Transcutaneous Electrical Nerve Stimulation (TENS)
TENS is a method of applying controlled, low-voltage electrical stimulation to large, myelinated peripheral nerve fibers via cutaneous electrodes for the purpose of modulating stimulus transmission and relieving pain. Research on TENS therapy in patients with cancer is limited to single-group studies and case reports.29 A meta-analysis of studies of TENS therapy in postoperative patients found that both TENS and sham TENS significantly reduced pain intensity; no significant differences were found between the two for either analgesic use or pain intensity. These results suggest that, just as with some other interventions, part of the efficacy of TENS can be attributed to a placebo effect. Patients with mild pain may benefit from a trial of TENS.
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