Title: A Quantitative Study on the Enlarged Exposure Field by the Retrosigmoid Suprameatal Approach
Abstract: Objective To study the quantitative changes of the exposed field of the middle fossa and the superior clivus by the RSSMA.Materials were 28 human cranium;formalin fixed cadavers and fresh cadavers were studied and operation microscopes was used for 8~12 times.Methods Based on the retrosigmoid approach,the suprameatal terbucle(ST) and the petrosal apex(PA) was drilled.The CT and the manual measurements were used in determining the length of the ST and PA in three dimensions before and after the resection of them.The exposed field of the middle fossa and superior clivus and the length of the exposed trigeminal nerve were also measured.Results The middle-lateral,anterior-posterior part of the ST could be wholly resected.And in the superior-inferior direction,auditory canal could be skeletonized.The PA was partially resected.(144.6±13.9) mm2 of the middle fossa and(90.3±16.7) mm2 of the superior clivus were added to be exposed.Conclusion The median part of the middle fossa and the lateral part of the superior clivus and the trigeminal nerve in the Meckel's cave could be exposed by the RSSMA.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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