Peribulbar anesthesia. A prospective statistical analysis of the efficacy and predictability of bupivacaine and a lignocaine/bupivacaine mixture.

The object of this trial was to determine the efficacy in peribulbar anesthesia of bupivacaine 0.5%, 0.75%, and a combination of bupivacaine 0.5% and lignocaine 2% in equal parts. Fifty-one and 50 patients in random order were injected with 0.5% and 0.75% bupivacaine, respectively, and another 50 patients with the lignocaine/bupivacaine mixture. The results were recorded and all data were statistically analyzed. We concluded that the peribulbar route with the agents used in this trial was not a successful technique. Our criterion for a successful block, i.e., akinesia, was not achieved in more than 54% of cases.