Objective. To describe details and technical difficulties observed in the use of this access for the treatment of middle cerebral artery aneurysms. Methods. This is a retrospective study including 15 patients with middle cerebral artery aneurysm operated on using this technique (two ruptured aneurysms and 13 incidental aneurysms). We considered age, gender, laterality of the aneurysm, and whether it was ruptured. We evaluated the surgical corridor (surgical field exposure and ease of handling of the surgical instruments), surgery time, complications, functional and cosmetic results. Results. This access provides adequate exposure of the surgical field, but the restricted working angle makes it difficult to dissect the aneurysm and, especially, to place the definitive clip. Conclusion. The restriction of the working angle may compromise the safety of the surgery. It is important to determine the specific indications for this access, particularly in cases of incidental aneurysms.Key words: Intracranial aneurysm; Supraorbital key-hole approach; Microsurgery . RESUMOObjetivo. Descrever pormenores e dificuldades técnicas observadas na utilização deste acesso para tratamento de aneurismas da artéria cerebral média. Métodos. Estudo retrospectivo de 15 doentes com diagnóstico de aneurisma da artéria cerebral média operados por esta técnica (2 aneurismas rotos e 13 incidentais). Consideramos idade, gênero, lateralidade do aneurisma, roto ou não roto. Realizamos avaliação do "corredor" cirúrgico (por meio da exposição do campo cirúrgico e conforto na manipulação de instrumentos cirúrgicos), duração do ato cirúrgico, complicações, resultado funcional pela "Glasgow outcome scale" (GOS) e cosmético. Resultados. Este acesso proporciona adequada exposição do campo cirúrgico, o ângulo de trabalho restrito dificulta a dissecção do aneurisma e, principalmente, a colocação do clipe. Conclusão. A restrição do ângulo de trabalho pode comprometer a segurança da cirurgia. É importante determinar as indicações especÍficas para este acesso, particularmente em casos de aneurisma incidentais.Palavras-chave: Aneurisma intracraniano; Acesso supraorbitário "key-hole"; Microcirurgia.
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