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作者以 Shrapnell 氏1832年发表的文献为基础,结合近年有关实验研究对鼓膜松弛部做一介绍。Shrapnell 氏描述鼓膜松弛部的特点为:①呈松弛状态;②不附于骨沟;③纤维和血管呈不规则分布且形状多变;④内侧面光润;⑤呈平面而不呈圆锥体形。氏认为鼓膜松弛部可缓解鼓膜受到外界来的突然压力,防止鼓膜紧张部破裂。其后各家研究发现松弛部由三层组成:①表皮层由复层鳞状上皮细胞构成;②固有层由结缔组织构成,主要是胶原纤维,但排列不规则,弹力纤
The author based on the literature published by Shrapnell in 1832, combined with the recent experimental study of tympanic membrane relaxation to make an introduction. Shrapnell’s description of tympanic membrane relaxation of the Department as follows: ① was in a relaxed state; ② does not attach to the trough; ③ fibers and blood vessels were irregularly distributed and the shape of change; ④ medial smooth; ⑤ plane was not conical. ’S that the tympanic membrane relaxation can ease the sudden tympanic membrane from the outside world to prevent rupture of the tympanic membrane tension. Subsequent studies found that the relaxation consists of three layers: the epidermis consists of stratified squamous epithelial cells; the lamina propria consists of connective tissue, mainly collagen fibers, but arranged irregular, elastic fibers