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目的 :观察鼓室管上隐窝的胚胎发育和毗邻关系 ,为鼓室疾病的诊治提供形态学基础。方法 :取 12～ 3 5周死胎颞骨标本 48侧 ,采用大体解剖和组织学切片两种方法 ,观察管上隐窝和该区域重要结构的胚胎发育特点和局部解剖学关系。结果 :管上隐窝在胚胎 2 0周出现 ,是上鼓室向前延伸的漏斗形骨龛 ,具有六个壁。骨帘在 2 4～ 2 8周出现。结论 :骨帘在匙突前方参与构成面神经管水平段外侧壁的一部分 ,切除骨帘是建立上鼓室通气和引流的理想通路。
OBJECTIVE: To observe the embryonic development and adjacent relationship of the crypt in the tympanic canal and provide the morphological basis for the diagnosis and treatment of tympanic diseases. Methods: Forty-eight specimens of the temporal bone specimens of 12-3 5 weeks old were collected. Gross anatomy and histological sections were used to observe the relationship between the embryonic development and the anatomic features of the important structures in the duct. Results: The crypt on the tube appeared at 20 weeks in the embryo. It was a funnel-shaped bone niche with a forward extension of the tympanum, with six walls. Bone curtain in 24 ~ 28 weeks appear. CONCLUSION: Bone curtain participates in the front part of the key process to form part of the lateral wall of the horizontal section of facial nerve canal. Removal of the bone curtain is the ideal way to establish ventilation and drainage of the upper tympanic cavity.