Ear Infection (cont.)

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What are the risk factors for acute middle ear infection or inflammation?

Upper respiratory infections predispose to acute otitis media. Exposure to groups of children (as in child care centers) results in more frequent colds, and therefore more earaches. Exposure to air with irritants, such as tobacco smoke, also increases the chance of otitis media. Children with cleft palate or Down syndrome are more prone to ear infections. Any problems with the Eustachian tubes (for example, blockage, malformation, inflammation) will increase the risk of otitis media.

Children who have episodes of acute otitis media before six months of age tend to have more ear infections later in childhood.

How is acute otitis media diagnosed?

The American Academy of Pediatrics (AAP) and the American Academy of Family Physicians (AAFP) have determined that three criteria are needed to diagnose acute otitis media (AOM); acute onset, middle ear effusion (MEE), and middle ear inflammation. Recurrent acute otitis media is defined as three acute otitis media episodes in 6 months, or 4 acute otitis media episodes in a year. There is no definitive lab test for acute otitis media.

Identification of the three criteria is dependent on clinical observation; middle ear effusion and middle ear inflammation are the most difficult to observe and as a consequence there are studies that suggest acute otitis media is over diagnosed. One method that helps determine acute otitis media versus otitis media with effusion is pneumatic otoscopy (normal moves readily with pressure changes) and the appearance of the tympanic membrane (acute otitis media has abnormal appearance, otitis media with effusion does not). However, no everyone is skilled at this technique; Pediatricians, Family Practice, ENT specialists, and ER doctors that work in pediatric ER's are likely to be skilled in the diagnostic procedure.

Reviewed by William C. Shiel Jr., MD, FACP, FACR on 10/13/2011

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