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1 results

  • Levobupivacaine hydrochloride and sufentanil have no antimicrobial effect at 25°C in vitro

  • M. Guillier, E. Boselli, L. Bouvet, J. Freney, F. N. R. Renaud, D. Chassard, B. Allaouchiche
  • Journal:
    European Journal of Anaesthesiology / Volume 24 / Issue 7 / July 2007
    Published online by Cambridge University Press:
    01 July 2007, pp. 634-639
    Print publication:
    July 2007
  • Background and objectives

    Levobupivacaine in combination with sufentanil may be used for labour or postoperative regional analgesia. The risk of bacterial growth within these contained solutions for several hours at room temperature is unknown. We investigated the in vitro antimicrobial effect of levobupivacaine and sufentanil against common micro-organisms encountered during regional anaesthesia.

    Methods

    Standardized suspensions of Staphylococcus aureus, Staphylococcus epidermidis and Escherichia coli were incubated for 1, 3, 6 and 24 h at 25°C, with saline (as control), sufentanil 0.5 or 0.75 μg mL−1, levobupivacaine hydrochloride 5.6 mg mL−1 and concentrations of 1.4, 2.8 and 5 mg mL−1 of levobupivacaine hydrochloride with sufentanil 0.5 μg mL−1. Colony counts were compared after 24 h incubation at 37°C.

    Results

    No bacterial growth was observed on any bacterial strain for any solution tested throughout the experiment.

    Conclusions

    Our results suggest that solutions of levobupivacaine combined with sufentanil may be used for 24 h at room temperature during regional anaesthesia with no risk of bacterial growth.