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鼓膜松弛部对中耳功能的作用,至今还不十分清楚。为了观察鼓膜松弛部的结构和生理功能,作者们选择了松弛部较大易于观察的大鼠作为实验动物,采用改变中耳压力的办法进行实验。鼠的鼓膜松弛部约占整个鼓膜的1/4～1/3;从解剖上看,鼠和人的中耳很相似。实验分两组进行,每组20只鼠(重量在450克左右)。在腹膜内麻醉下,第一组鼠先暴露鼓泡,切断外耳道,这样就能看到鼓膜;再用电钻钻开鼓泡,插入导管,连接好微升注射器。第二组20只鼠在鼓环附近切断外耳道,明视鼓膜,再
The role of tympanic membrane relaxation on the middle ear function, is still not very clear. In order to observe the structure and physiological function of the tympanic membrane relaxation section, the authors selected rats that were easily observed in the relaxation section as experimental animals and used the experiment of changing the pressure of the middle ear. The rat tympanic membrane slack accounts for about 1/4 ~ 1/3 of the entire tympanic membrane; from the anatomical point of view, the mouse and human middle ear are very similar. The experiment was divided into two groups, each group of 20 rats (weighing about 450 grams). Under intraperitoneal anesthesia, the first group of rats were exposed to bubbling, the external auditory canal was cut off so that the tympanic membrane could be seen; then the ampule was drilled and inserted into the catheter to connect the microliter syringe. The second group of 20 rats cut off the external auditory meatus in the vicinity of the drum ring, looking at the tympanic membrane, and then