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Temporal summation during extradural anaesthesia

Curatolo, M. ; Petersen-Felix, S. ; Arendt-Nielsen, L. ; Fischer, M. ; Zbinden, A M.

In: British journal of anaesthesia, 1995, vol. 75, no. 5, p. 634-635

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    Titre
    • Temporal summation during extradural anaesthesia
    Auteur
    • Curatolo, M.. Institute of Anaesthesiology and Intensive Care, University of Bern, Switzerland.
    • Petersen-Felix, S.. Institute of Anaesthesiology and Intensive Care, University of Bern, Switzerland.
    • Arendt-Nielsen, L.. Institute of Anaesthesiology and Intensive Care, University of Bern, Switzerland.
    • Fischer, M.. Institute of Anaesthesiology and Intensive Care, University of Bern, Switzerland.
    • Zbinden, A M.. Institute of Anaesthesiology and Intensive Care, University of Bern, Switzerland.
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • British journal of anaesthesia, 1995, vol. 75, no. 5, p. 634-635
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:299361
    Summary
    We have investigated in 10 patients the effect of extradural anaesthesia on temporal summation by comparing pain thresholds to single and repeated (five impulses at 2 Hz) electrical stimuli and compared these tests with pinprick and cold stimulation. Bupivacaine 0.5% (20 ml) was injected at L2-3. After extradural anaesthesia the threshold to repeated stimuli was significantly lower than the threshold to single stimuli (P = 0.0007). Nine patients lost cold sensation and 10 patients pinprick sensation. Pain to single electrical stimulation disappeared in six patients and pain to repeated electrical stimulation in one. Pain may be evoked by temporal summation of repeated electrical stimuli even when pinprick sensation, cold sensation and pain to single electrical stimuli are inhibited. Thus temporal summation should be taken into consideration when extradural analgesia is assessed