正常的中耳形态是保持听觉传导通路的基础。维持中耳腔正常生理压力状态的必要条件是正常的咽鼓管功能和中耳腔内各部位通道畅通。咽鼓管功能障碍对任何类型中耳炎症的发生都是重要的因素。鼓室黏膜具有气体吸收和交换以及分泌和排泄功能, Normal middle ear morphology is the basis for maintaining auditory conduction pathways. Necessary conditions to maintain the normal physiological pressure in the middle ear cavity is normal eustachian tube function and middle ear cavity various parts of the channel flow. Eustachian tube dysfunction is an important factor for the onset of any type of otitis media. Tympanic mucosa with gas absorption and exchange and secretion and excretion function,