The systemic toxicity of local anaesthetics may be treated using lipid emulsions ("lipid rescue"). However, there is no evidence-based proof of the efficacy of the treatment. The aim of the intended protocol is to study the effect of the emulsion Intralipid® on the toxicity prodromes in volunteers receiving either levobupivacaine or ropivacaine. After a sensitization session with lidocaine, subjects will receive in a double blind, crossover manner an i.v. infusion of levobupivacaine or ropivacaine followed by a rapid infusion of Intralipid®. The primary outcome will be the time of appearance of early neurologic signs of toxicity. In addition, the EEG and ECG will be monitored and blood sampling will be performed in order to evaluate the changes in pharmacokinetics induced by the emulsion.
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Duration of drug infusion
Timeframe: less than 15 minutes