Der Anaesthesist
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The effects of increasing the maximum prescribed volume of 50 ml lidocaine 1% to 65 ml in a combined sciatic 3-in-1 block were investigated in 25 adult patients. The goal of the study was (1) to show possible increase in the success rate and (2) to determine if toxic plasma levels of local anaesthetic would be reached. Further more, we wanted to find out if there were any side-effects. ⋯ There were no statistical differences between the three groups. CONCLUSION. Increasing the dosage of lidocaine from 500 to 650 mg makes the block very successful without any toxic side-effects.