External Otitis: The most common disorder of the outer ear. The process develops due to loss of the protective cerumen and excessive moistures in the ear canal. This leads to maceration of the canal skin allowing bacterial growth and invasion. Symptoms include otalgia, mild hearing loss, and scant otorrhea.
Otitis Media: Inflammation of the middle ear. It may be acute, chronic, suppurative or secretory.
Acute otitis media occurs commonly in children. It's incidence rises during the winter months. It is a result from disruption of Eustachian tube patency.
Suppurative otitis media occurs due to respiratory tract infection, allergic reaction, or positional changes during feeding. Allow reflux of nasopharyngeal flora through the eustachian tube and colonization in the middle ear. Pathogens involve Pneumococci, beta hemolytic streptococci, Hemophilus influenza and other gram- negative bacteria.
Secretory otitis media occurs due to obstruction of the eustachian tube results in negative pressure in the middle ear that promotes transudation of sterile serous fluid from blood vessels in the membrane of the middle ear that promotes transudation of sterile serous fluid from blood vessels in the membrane of the middle ear.
Chronic secretory otitis media is cause by an adenoidal tissue overgrowth that obstructs the eustachian tube that obstructs the eustachian tube, edema resulting from allergic rhinitis or chronic sinus infection, and inadequate treatment of acute suppurative otitis media.
Chronic suppurative otitis media: It is in most cases the result of inappropriate treatment of acute suppurative otitis media. It is a chronic inflammation of the mucous membrane, periost and even osseous tissue of the middle ear. Symptoms: A long period of recurrent otopyorrea which is very difficult to get cured, hypoacusis and perforation of the tympanic membrane
Ref: PMD, OSL, Bangladesh
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