Percutaneous electrical nerve stimulation (PENS) is a technique that has been described as a ‘novel analgesic therapy’. A review was performed of the published literature in order to compare PENS with the author's knowledge and experience of the use of EA, specifically with regard to the stimulation parameters, the selection of points, and the reported efficacy. The conclusion of the review is that PENS is neither different in principle nor in practice from EA, and whilst the term accurately reflects the nature of the treatment, there is no substantial justification for referring to PENS as a novel therapy.
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