A population pharmacokinetic-pharmacodynamic model was developed that quantitatively described sensory blockade during epidural anesthesia, including the effects of age. The model may be useful to individualize dose requirements, to predict the time course of sensory blockade, and to study new local anesthetics.

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D3-levobupivacaine is pharmacokinetically equivalent to unlabelled levobupivacaine and can be used to study the absorption and disposition kinetics after perineural administration of levobupivacaine in a single experiment.