Rosowski J J, Davis P J, Merchant S N, Donahue K M, Coltrera M D
Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston 02114.
Ann Otol Rhinol Laryngol. 1990 May;99(5 Pt 1):403-12. doi: 10.1177/000348949009900515.
In vitro measurements of the middle ear input immittance in temporal bones extracted from human cadavers were directly compared with similar in vivo measurements from clinically normal subjects. The results of this comparison indicate that most otoscopically normal unfixed cadaver ears have middle ear input immittances that are indistinguishable from those of live subjects in the 0.1- to 2-kHz range--as long as they have been kept from drying and the static pressures on either side of the tympanic membrane are equal. The effects of the middle ear muscles on the measured input immittance are generally small and the cadaver ears can be maintained in the frozen state for several months with little change. Tympanometry appears to be a reliable indicator of normal middle ear immittance. Cadaver middle ears are useful models of human middle ear function.
对从人类尸体中取出的颞骨进行中耳输入导纳的体外测量，并将其与来自临床正常受试者的类似体内测量结果直接进行比较。该比较结果表明，只要避免干燥且鼓膜两侧的静态压力相等，大多数耳镜检查正常的未固定尸体耳朵在0.1至2千赫兹范围内的中耳输入导纳与活体受试者的中耳输入导纳无法区分。中耳肌肉对测量的输入导纳的影响通常较小，并且尸体耳朵可以在冷冻状态下保持数月而变化很小。鼓室导抗图似乎是正常中耳导纳的可靠指标。尸体中耳是人类中耳功能的有用模型。
