British Journal of Anaesthesia, 1986, Vol. 58, No. 10 1130-1134
© 1986 The Board of Management and Trustees of the British Journal of Anaesthesia
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CONTRIBUTION OF EXTRADURAL TEMPERATURE TO SHIVERING DURING EXTRADURAL ANAESTHESIA
Department of Anesthesiology Department of Physiology University of Texas Southwestern Medical School 5323 Harry Hines Boulevard, Dallas, TX 75235, U.S.A.
Thirty patients having postpartum tubal ligation under extradural anaesthesia were studied. All received bupivacaine at 4°C initially and the incidence of shivering (47%), and the extradural temperatures measured with a small thermistor threaded into the extradural catheter, were recorded. To eight patients in whom the resultant shivering was marked, further bupivacaine warmed to 41°C was injected. In four of these patients, shivering was stopped. The results suggest that thermosensitive tissue within the spinal canal contributes to the shivering observed in association with extradural anaesthesia.
*Present address for correspondence: Department of Anaesthesia, King's College Hospital, Denmark Hill, London SE5.