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  • Title: [Thermal effects of epidural anesthetic block].
    Author: González de Zárate Apiñaniz J, Sayalero San Miguel JM, Alvarez López JC, Arribas Carrión C.
    Journal: Rev Esp Anestesiol Reanim; 1991; 38(4):238-41. PubMed ID: 1771285.
    Abstract:
    In a sample of 20 healthy men (ASA I) we studied the thermal effects induced after epidural anesthetic blockade with bupivacaine (0.625%) and their relationship with the level of sensitive blockade to puncture or to cold. After 30 min of epidural injection of bupivacaine the level of cephalic analgesia was D IX (D IX +/- 2 segments) and that of cold discrimination D VII (D VII +/- 2 segments) being the thermo-algesic differential blockade of 2 to 3 segments. During epidural anesthesia there was a significant increase in foot skin temperature (4.1 +/- 1 centigrade degrees, p less than 0.001) without any appreciable skin temperature change at the thorax, abdomen, thigh, and calves. It is concluded that epidural anesthesia with bupivacaine (0.625%) at a sensitive analgesic level D IX produces significant increases in skin temperature only at the foot. This indicates that the extension level of sympathetic blockade is lower that of the analgesia.
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