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I.はじめに
hemifacial spasmに対する神経血管減圧術の評価はすでに確立されており3,5-11,13,19,20),多くの施設で広く行われている.術前の血管撮影検査を行わない施設も少くないが,当施設では血管性病変の除外や術中所見を予測する目的で,術前椎骨動脈造影を全例に施行してきた.今回,hemifacial spasm100例について,手術所見と術前椎骨動脈像を詳細に対比し,圧迫血管の解剖学的検討を行ったので報告する.
Relationship between angiographical manifestations and operative findings of hemifacial spasm was studied in 100 cases.
Vertebral angiography was performed, and Towne, straight AP, and lateral projections were routinely stu-died.
The anterior inferior cerebellar artery (AICA) direct-ly compressed the facial nerve root exit zone in 54 in-stances, the posterior inferior cerebellar artery (PICA) in 38, and the vertebral artery (VA) in 11. Compres-sions by multiple vessels were observed in 3 cases.
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