British Journal of Anaesthesia, 1988, Vol. 61, No. 3 308-312
© 1988 The Board of Management and Trustees of the British Journal of Anaesthesia
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TRANSCUTANEOUS ELECTRICAL NERVE STIMULATION IN THE MANAGEMENT OF ACUTE POSTOPERATIVE PAIN
,
Nuffield Department of Anaesthetics, Radcliffe Infirmary Oxford
Nuffield Department of Clinical Biochemistry, Radcliffe Infirmary Oxford
Department of Engineering Science, University of Oxford Oxford
* Wai-iti Road, Timaru, New Zealand.
Diagnostic Products Corporation, Witney, Oxon OX8 6AN.
Correspondence to C.J.G.
Twenty patients undergoing decompressive lumbar laminectomy were randomly allocated, in a double-blind manner, to receive active or inactive transcutaneous electrical nerve stimulation (TENS) as part of the management of their postoperative pain. All patients received the same non-narcotic general anaesthetic. The efficacy of the TENS was assessed by using a patient -controlled analgesia system (PRODAC) which delivered morphine i.v. This system recorded the number of demands for analgesia and the total dose administered in the first 24 h. In addition, plasma morphine concentrations were measured hourly for the first 6 h and again at 24 h. There was no statistical difference between the two groups in the number of patient demands for analgesia, morphine dose or plasma morphine concentration. TENS offered no advantage over a placebo in the management of acute post-operative pain in these patients.
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