British Journal of Anaesthesia, 1987, Vol. 59, No. 6 791-799
© 1987 The Board of Management and Trustees of the British Journal of Anaesthesia
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PRESENT STATE OF EXTRADURAL AND INTRATHECAL OPIOID ANALGESIA IN SWEDEN
A Nationwide Follow-up Survey
Department of Anaesthesia and Intensive Care, Örebro Medical Center Hospital Örebro, Sweden
Department of Anaesthesia, Karolinska Hospital Stockholm, Sweden
Department of Clinical Pharmacology, Huddinge University Hospital Huddinge, Sweden
*Present address, for all correspondence: Department of Anesthesiology, The University of Texas Medical School, Houston, Texas 77030 U.S.A.
A nationwide follow-up survey was undertaken to study the use of extradural and intrathecal opioids in the management of pain, to estimate the incidence of delayed ventilatory depression and to study post-injection surveillance routines. A questionnaire was sent to all 93 anaesthetic departments in Sweden; 96% responded. The major indication for using extradural opioids was the treatment of postoperative, traumatic and cancer pain. During 1984 over 14000 patients received extradural, and over 1100 patients intrathecal, opioids. Morphine was the predominant opioid for extradural administration and was used in 96% of patients. Extradural opioid analgesia constitutes about 25% of all extradural blocks performed in Sweden. Pruritus and urinary retention were considered as minor problems; however, the risk was considerably higher after intrathecal morphine. The incidence of delayed ventilatory depression was about 1: 1100 (0.09%) following extradural morphine and 1:275 (0.36%) following intrathecal morphine. Risk factors for delayed ventilatory depression are discussed. Administration of extradural morphine for postoperative pain relief in patients undergoing major surgery is considered a high benefit-low risk technique by most Swedish anaesthetists. The results of the present nationwide survey suggests that, following extradural morphine, surveillance of patients for smore than 12 h appears unnecessary.
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