摘要
目的 :为经迷路下开放内耳道提供解剖资料。方法 :解剖测量 1 0 0块颞骨、2 5具成人头颅。结果 :经迷路下后方开放耳道的后下部分 ,该处血管、神经分界清楚 ,易完整切断前庭神经。乙状窦前缘中点 ,前庭导水管外口为该手术进路的外部解剖标志 ,沿后半规管下支向内磨除可将 76%标本的内耳道开放 2 /3。后半规管曲部骨质厚度为 3.1 3± 1 .59mm,后半规管下支末端骨质厚度为 5.83± 1 .59mm,后半规管下支至颈静脉球顶点的距离为 5.47± 3.2 6mm,单孔至后半规管曲部的距离为 1 0 .2 1 + 1 .2 1 mm,单孔前庭的距离为2 .99± 0 .79mm。结论 :经迷路下开放内耳道是另一种非破坏迷路开放内耳道的手术方法。
Objective: To investigate the advantages and disadvantages of opening the internal auditory canal (IAC) by the infralabyrinthine approach and provide the anatomic means.Method: One hundred temporal bones and 25 adult skulls were anatomized and measured.Results: The posterior and lower part of the internal auditory canal opening by the posterior and lower part of infdalabyrinthine where the blood vessel and the nerve have clear boundary, is easy to be cut off the nerve of vestibule completely.The midpoint of medial margin of the sigmoid sinus and the aqueduct external entrance of the vestibule were regarded as the anatomic marks for operation. Two thirds of IAC was opened by operating in the sigmoid sinus lining inferior branch of the posterior semicircular canal (PSC) in 76% of the cadavers.The posterior surface of the arch of the PSC is 3.13±1.59mm thick. The posterior surface of the arch of the inferior branch of the PSC is 5.83±1.59mm thick. The distance from the inferior branch of the PSC to the highest point of the jugular bulb is 5.47±3.26mm.The distance from the foramen singulare to the arch of the PSC is 10.21±1.21mm.The distance from the foramen singulare to ampulla of the PSC is 2.99±0.79mm.Conclusion: Opening the internal auditory canal (IAC) by the infralabyrinthine approach is another method without opening the labyrinth in the process.
基金
山东省卫生厅青年科研基金!(92 0 7)
关键词
迷路
内耳道
解剖学
局部
Labyrinth
Internal auditory canal
Anatomy,regional
