慢性中耳炎的危险型可出现鼓膜松弛部的穿孔和鼓膜边缘性穿孔。
The dangerous type chronic otitis media occurs with pars flaccida and marginal perforations.
目的：建立航空性中耳炎的动物研究模型。
Objective: To establish the animal model of aero-otitis media.
前言：目的：探讨难治性化脓性中耳炎的原因。
Objective: To study the cause of intractable suppurative otitis media.
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