Your doctor will examine the eardrum with an instrument called an otoscope for signs of infection -- not an easy task if the patient is a fussy infant. The doctor may also check for blockage or filling of the middle ear using a pneumatic otoscope, which blows a little air at the eardrum. This air should cause the eardrum to move a little back and forth. If fluid is present, the eardrum will not move as readily. Another test for ear infections is tympanometry, which uses sound and air pressure to check for fluid in the middle ear. If needed, an audiologist will perform a hearing test to determine if there is hearing loss.
