Li Y
Third Clinical College, Zhongshan University of Medical Sciences, Guangzhou.
Zhonghua Er Bi Yan Hou Ke Za Zhi. 1992;27(1):21-3, 61.
Scanning electron microscopic studies were made on the mucosa of newborn middle ear. The results were: 1. The epithelial surface was found to contain four types of cell: the ciliated cell, the nonciliated cell without secretory granules (SG), the nonciliated cell with secretory granules (SG) and the flat cell. 2. The ciliated cell population appeared in the following order (from dense to sparse): eustachian tube, hypotympanum, antetympanum, epitympanum, promontory and post-tympanum. 3. The density of nonciliated cell without SG population was gradually increasing from anterior to posterior part of middle ear. 4. The population of nonciliated cell with SG was fewer and they were always found near the ciliated cells. 5. The flat cells were only seen on the flaccid part of tympanic membrane. This paper suggests that the ciliary system is basically mature and the development of mucus secreting members still is not perfect in newborn middle ear mucosa.
对新生儿中耳黏膜进行了扫描电子显微镜研究。结果如下：1. 发现上皮表面有四种细胞：纤毛细胞、无分泌颗粒的非纤毛细胞、有分泌颗粒的非纤毛细胞和平扁细胞。2. 纤毛细胞数量按以下顺序排列（从密集到稀疏）：咽鼓管、鼓室下部、鼓室前部、鼓室上部、岬部和鼓室后部。3. 无分泌颗粒的非纤毛细胞数量从耳中前部向后部逐渐增加。4. 有分泌颗粒的非纤毛细胞数量较少，且总是在纤毛细胞附近发现。5. 扁平细胞仅见于鼓膜松弛部。本文表明，新生儿中耳黏膜的纤毛系统基本成熟，而黏液分泌成分的发育仍不完善。
