• David Slack, Lonnie Nelson, David Patterson, Stephen Burns, Kevin Hakimi, and Lawrence Robinson.
• Rehabilitation Care Services Electrodiagnostic Clinic, Veterans Affairs Puget Sound Health Care System, Seattle, Washington, USA.
• Am J Phys Med Rehabil. 2009 Jan 1;88(1):21-9.

ObjectiveOur hypothesis was that hypnotic analgesia reduces pain and anxiety during electromyography (EMG).DesignWe performed a prospective randomized, controlled clinical trial at outpatient electrodiagnostic clinics in teaching hospitals. Just before EMG, 26 subjects were randomized to one of three 20-min audio programs: education about EMG (EDU) (n = 8); hypnotic induction without analgesic suggestion (n = 10); or hypnotic induction with analgesic suggestion (n = 8). The blinded electromyographer provided a posthypnotic suggestion at the start of EMG. After EMG, subjects rated worst and average pain and anxiety using visual analog scales.ResultsMean values for the EDU, hypnotic induction without analgesic suggestion, and hypnotic induction with analgesic suggestion groups were not significantly different (mean +/- SD): worst pain 67 +/- 25, 42 +/- 18, and 49 +/- 30; average pain 35 +/- 26, 27 +/- 14, and 25 +/- 22; and anxiety 44 +/- 41, 42 +/- 23, and 22 +/- 24. When hypnosis groups were merged (n = 18) and compared with the EDU condition (n = 8), average and worst pain and anxiety were less for the hypnosis group than EDU, but this was statistically significant only for worst pain (hypnosis, 46 +/- 24 vs. EDU, 67 +/- 35; P = 0.049) with a 31% average reduction.ConclusionsA short hypnotic induction seems to reduce worst pain during electromyography.

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