迷路下进路有经后半规管下和经耳蜗下两种。此进路可暴露岩尖前、后部和内听道外侧段。有暴露直接、无须开颅、保留迷路功能、易于切断前庭神经和向岩尖提供永久通气道等优点。特别适合于听力损害不重的岩尖炎、岩尖胆固醇肉芽肿和顽固性梅尼埃病。本文综合介绍了该进路的有关解剖、手术适应症和手术方法等,并进行评价。 Lost under the road after the semicircular canal and cochlear under the two. This approach exposes the anterior, posterior, and lateral segments of the petrosal nerve. Direct exposure, no craniotomy, lost function, easy to cut off the vestibular nerve and to provide a permanent airway rock tip and other advantages. Particularly suitable for hearing damage is not heavy rock tip inflammation, rock-tip cholesterol granulomas and refractory Meniere’s disease. This article introduces the relevant anatomy of the approach, surgical indications and surgical methods, and evaluation.