Middle ear infection, also called acute otitis media, is an inflammation of the middle ear space.

中耳感染，也称为急性中耳炎，是中耳腔的一种炎症。

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Conclusion:The attic retraction pocket reflected the negative pressure of middle ear and its pathogenesis was related with the function of Eustachian tube, inflammation and pneumatization of mastoid.

结论上鼓室内陷袋反映中耳负压状态，其发病机制与咽鼓管功能、炎症、乳突气化程度相关；

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