Sennaroglu Levent, Slattery William H
House Ear Clinic and House Ear Institute, Los Angeles, California 90057, USA.
Laryngoscope. 2003 Feb;113(2):332-42. doi: 10.1097/00005537-200302000-00025.
The objective was to describe the relationship of anatomical landmarks required for the middle fossa approach to lesions of the petrous apex and internal auditory canal (IAC). Landmarks for safe identification of the IAC are defined, as are two zones (safe zones I and II) anterior and posterior to the IAC.
Temporal bone anatomical study.
Ten temporal bones underwent high-resolution computed tomography followed by wet bench dissection. A set of 39 different distances between vital structures was measured, where possible, from both radiology films and under the microscope. Mean, median, minimum, and maximum measurements of all distances were determined. Angular measurements were made using a specially designed instrument.
Measurements were made in an anatomical position to mimic the middle fossa surgical technique. Measurements are presented for the superior surface of the temporal bone from the sigmoid sinus and inner table to vital structures, from the anterior and posterior petrous apex, and from the IAC.
Petrous apex anatomical knowledge is required for the safe middle fossa approach to the IAC and petrous apex. Two safe zones are defined that should prevent damage to the cochlea and the superior semicircular canal.
描述中颅窝入路至岩尖及内耳道（IAC）病变所需的解剖标志之间的关系。定义了安全识别内耳道的标志以及内耳道前后的两个区域（安全区I和II）。
颞骨解剖学研究。
对10个颞骨进行高分辨率计算机断层扫描，然后进行尸体解剖。尽可能从放射学胶片和显微镜下测量一组39个重要结构之间的不同距离。确定所有距离的平均值、中位数、最小值和最大值。使用专门设计的仪器进行角度测量。
在解剖位置进行测量以模拟中颅窝手术技术。给出了从乙状窦和内板到重要结构、从岩尖前后以及从内耳道的颞骨上表面的测量值。
中颅窝入路至内耳道和岩尖需要掌握岩尖解剖学知识。定义了两个安全区，可防止损伤耳蜗和上半规管。
