Li Zhenghua, Shi Dazhi, Li Heng, Tan Songhua, Liu Yikang, Qi Chenglin, Tang Anzhou
Otorhinolaryngology Head and Neck Surgery, Liuyang traditional Chinese Medicine hospital, Liuyang, Hunan, China.
Otorhinolaryngology Head and Neck Surgery, The Second Affiliated Hospital of University of South China, Hengyang, Hunan, China.
Surg Radiol Anat. 2018 Jun;40(6):713-720. doi: 10.1007/s00276-018-2020-6. Epub 2018 Apr 21.
The anatomic structure of the cochlear aqueduct (CA) in human temporal bone specimens was observed using micro-computed tomography (CT).
Micro-CT scanning of 18-µm-thick slices was performed on 30 slides of human temporal bone specimens to observe the CA structure and its relationship with its surroundings. The length, internal and external apertures, and the narrowest width of the CA were measured. The differences in CAs were compared between high jugular bulb (HJB) specimens and normal specimens.
A large number of CA images were acquired using Micro-CT scanning, which clearly displayed the basic anatomic structures, stereotactic localizations, and adjacent relationships of the CAs. The whole course of a CA was 12.31 ± 3.60 mm, the diameter of the internal aperture was 465 ± 242 µm, the diameter of the external aperture was 2.88 ± 1.06 mm, the narrowest diameter was 601 ± 335 µm, the diameter of the opening of inferior cochlear vein (ICV) was 151 ± 50 µm, the distance between the internal aperture and ICV was 270 ± 197 µm, and the distance between the inferior margin of the internal acoustic meatus (IAM) and the top most part of the external aperture of the CA was 6.783 ± 2.15 mm. No bony obstruction of the CA or CA enlargement was observed in the specimens. A total of 28 CAs had one accompanying bony canal in the surroundings. The length and travelling of the CA were not affected by the level of the jugular bulb (JB). The variation of the travelling of the ICV was larger than that of the CA.
Micro-CT adequately displayed the bony CA canal and provided a new method for anatomical studies of the CA and a basis for functional studies.
采用微型计算机断层扫描（CT）观察人颞骨标本中蜗水管（CA）的解剖结构。
对30张人颞骨标本切片进行18μm厚切片的微型CT扫描，以观察CA结构及其与周围结构的关系。测量CA的长度、内口和外口以及最窄宽度。比较高位颈静脉球（HJB）标本和正常标本中CA的差异。
通过微型CT扫描获得了大量CA图像，清晰显示了CA的基本解剖结构、立体定位和相邻关系。CA全程长12.31±3.60mm，内口直径465±242μm，外口直径2.88±1.06mm，最窄直径601±335μm，蜗下静脉（ICV）开口直径151±50μm，内口与ICV的距离270±197μm，内耳道（IAM）下缘与CA外口最顶部的距离6.783±2.15mm。标本中未观察到CA的骨质阻塞或CA扩大。共有28个CA在周围有一条伴行骨管。CA的长度和走行不受颈静脉球（JB）水平的影响。ICV走行的变异大于CA。
微型CT能充分显示骨性CA管，为CA的解剖学研究提供了新方法，为功能研究奠定了基础。
