Hearing Impairment (guest) Flashcards
define tympanometry
-measurement of the ease that sound flows through the tympanic membrane while air pressure against the TM is varied
What is tympanometry used to detect?
disorders of the TM &middle ear
Type A tympanogram
- consistent with normal middle ear aeration and mobility
- TM intact
Type B tympanogram
- “flat” tympanogram
- consistent w/middle ear fluid
- flat tymp PLUS high volume indicates TM perforation or patent PE tube
Type C tympanogram
-neg middle ear pressure/TM retraction
-consistent with eustachian tube dysfunction
-
Type As tympanogram
- s=shallow/stiff
- suggests stiff middle ear system (scarred TM or ossicular fixation)
type Ad
- d=deep
- may be ossicular discontinuity
- also seen with monomeric, healed TMs, post PE-tube or perforation
causes of sensorineural hearing loss
- congenital/genetic
- prebycusis
- bacterial/viral infxn
- meds
- nerve tumors
- trauma
- noise
Noise induced hearing loss is a type of _______________ hearing loss
sensorinueral
What is the most common occupational illness or injury?
noise induced hearing loss
Noise-induced loss is usually _______
preventable
tx for sensorineural hearing loss
- prevention/education
- amplification
- meds
- surgery like cochlear implant, etc
Causes of conductive hearing loss
- cerumen impaction
- foreign body
- external ear infections
- TM perforation
- middle ear infection
- otosclerosis (stapes fixed)
- tumors
- congenital anomalies
tx for conductive hearing loss
- cerumen mgmt
- surgery
- meds
- amplification
digital hearing aid freatures
- environmental noise reduction
- noise canceing
- digital feedback suppression
- bluetooth
