Adults serous otitis media conductive deafness is the most common reason, Cumulative feature is the dark indoor water samples thin serous non-suppurative liquid. Mucus serous otitis media and otitis media with different clinical attention should be differential. The middle ear is a gas-bearing the body cavity, the same with the outside world via the eustachian tube. Under normal circumstances, the Eustachian tube was closed, only short-time swallowing or when open.
According to statistics eustachian tube opening up several times every minute, every open 1st, about 1 rose slightly gas into the middle ear. Eustachian tube opened up the middle ear can adjust the air pressure equilibrium with the outside world, the replacement of the middle ear cavity gas composition in order to maintain the normal function of the middle ear.
Serous otitis media is the root cause of the eustachian tube obstruction. Middle ear eustachian tube obstruction hinders normal gas exchange process, the middle ear cavity and gas are not being gradually absorbed the corresponding added that the result, part of the middle ear or a negative pressure vacuum. Middle ear negative pressure can lead to the middle ear mucosa serous capillary leakage, a serous otitis media, this theory known as "fill empty of water."
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