Hearing Aid Dispenser Written 204 Exam Questions with 100% Correct Answers | Verified | Latest Update|2024

db loss of a perforation of TM - ️️10-15db loss procedure done to fix perforation - ️️tympanoplasty or myringoplasty monomeric spots - ️️looks like a hole in TM, but reflects light like a mirror. holes that have healed. aka "mirror membranes" average dimentions of an adult eardrum - ️️2.3-2.9cm in length, .7cm in diameters pars tensa - ️️lower 4/5 of TM and tight pars flaccida - ️️upper 1/5 of TM and flaccid otis externa - ️️"swimmers ear" - inflammation of the walls of the EAM. will not cause loss unless swelling blocks canal. treat: warm salt water, drying it, topical antibiotics polyps - ️️masses of tissue that grow outward from a surface cholesteatoma - ️️non-cancerous tumor in the middle ear. oderous discharge. sometimes perforates upper TM. invasions of skin into the middle ear - sac of concentric rings of protein. causes conductive loss. most dangerous pathology. enlarged canal - ️️result of ear surgery. often have no ear drum or ossicular chain. need approval of physician before fitting