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作者对十岁以下小儿93例共173个颞骨标本进行观察,发现7例10个颞骨于鼓膜的纤维层内有成人所没有的软骨组织存在。此软骨组织平均宽200μ,厚120μ,长1600μ,呈前后扁平的棒状。若从外耳道观察,此鼓膜内软骨组织和槌骨柄的走向平行,位于紧张部的后上象限。其最上端延伸到皱襞的中心。软骨均位于纤维层内。鼓膜有软骨组织的7例中,4例是出生一个月内死亡的,最大的2岁。7例中6例死于显著的先
The authors observed a total of 173 temporal bone specimens from 93 infants under 10 years of age and found that there were 7 cases of 10 temporal arteries in the fibrous layer of the tympanic membrane that were not present in adult cartilage tissue. The average width of the cartilage tissue 200μ, thickness 120μ, length 1600μ, was flat before and after the rod. If observed from the external auditory canal, the eardrum cartilage tissue and the mallet stem parallel to the line, located in the upper quadrant of the tension quadrant. Its uppermost end extends to the center of the fold. Cartilage are located in the fibrous layer. Of the 7 cases with cartilage tissue in the tympanic membrane, 4 died within one month of birth and the oldest was 2 years old. Six of seven patients died of significant first