Transpetrosal approach の微小解剖と手術の注意点

抄録

In this paper, technical points of the transpetrosal approach for basilar trunk aneurysms are explained from a microsurgical viewpoint. The most important point is to know the area of bone resection, which is surrounded by the trigeminal impression anteriorly, the eminentia arcuata and internal auditory meatus posteriorly and the major petrosal groove laterally. The bone consistency is an another marking to discriminate the organic part of the petrous bone. Possible surgical complications are cranial nerve palsy of the Vth to VIIIth nerve. Surgical techniques for avoiding these complications are mentioned in the paper.