RESUMO
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.
Assuntos
Anestesia Local/métodos , Bupivacaína/administração & dosagem , Extração de Catarata , Lidocaína/administração & dosagem , Idoso , Bloqueio Nervoso Autônomo/métodos , Distribuição de Qui-Quadrado , Método Duplo-Cego , Quimioterapia Combinada , Feminino , Humanos , Injeções , Masculino , Órbita , Valor Preditivo dos Testes , Estudos ProspectivosRESUMO
Posterior peribulbar anaesthesia is a safe alternative to the better-known retrobulbar route because the local anaesthetic agent is deposited outside the ocular muscle cone and away from the retrobulbar nerves and blood vessels. The potential dangers of a retrobulbar injection are therefore greatly reduced but the same degree of anaesthesia and akinesia is achieved. The much safer and easier posterior peribulbar technique for intra-ocular surgery is described with reference to more than 400 cases.
