tions and for the initial injection when a continuous infusion is used (for continuous plexus nerve block analgesia). Unfortunately, the labelled syringe used for continuous infusion is not a dedicated one (30 mL is too small: too frequent changes are needed). We use dedicated coiled lines as well (Figure, Vygon laboratories, Ecouen, France). These lines are used on plexus nerve block lines and epidural lines in order to avoid the accidental iv infusion of local anesthetics. In any event, even with these precautions, we agree that: “the quite remarkable capacity for a human to circumvent almost any safeguards against medical error” will persist. Jean-Christophe Favier MD David Plancade MD Pascal Boulland MD Metz Armees, France