1 Secretory otitis media (SOM)
2 1、Definition * SOM is a condition characterised by presence of non-purulent fluid in the middle ear. * synonyms：otitis media with effusion、 serous otitis media、mucoid otitis media、 catarrhal otitis media 、glue ear. *classification: acute and chronic. * commonly seen in children
3 2、Causes: several factors may be attributed to this： 1.insuffciency of eustachian tube： •mechanical obstruction：adenoid hyperplasia •non-mechanical obstruction： 2.viral infection： 3.allergy： 4.unresolved acute otitis media
4 中耳炎的病因、机理、分类与转归
5 adenoid hyperplasia Endoscopy X-ray
6 Carcinoma of the nasopharynx
7 Comparation of eustachian tube shorter, wider, more horizontal, straight children adult
8 3、clinical manifestation: symptoms: 1、hearing loss 2、earaches 3、tinnitus
9 Ear examination: 1、otoscopic findings: *the tympanic membrane is usually dull and retracted with loss of light reflex. *fluid filled in the middle ear：horizontal or cresentic line, bubbles, colour changed
10 The image of tympanic membrane Dull of tympanic membrane fluid filled in the middle ear