Hearing Loss Flashcards
three types of hearing loss
- conductive
- sensorineural
- mixed
presentation of hearing loss
hearing loss
external scars
abnormalities of canal (discharge, swelling, bleeding, masses)
swelling over mastoid
facial weakness (lesions compressing facial nerve)
what is CHL a problem with?
canal/middle ear
causes of CHL
otitis externa
acute/chronic otitis media
otosclerosis
causes of otitis externa
water
cotton buds
skin conditions
what is SNHL a problem with?
cochlear
causes of SNHL
presbycusis noise-induced hearing loss drug-induced vestibular schwannoma Meniere's disease trauma
what hearing is lost is presbycusis?
high frequency
classic appearance on audiogram of noise-induced hearing loss?
dip at 4kHz
examples of drugs that cause SNHL
gentamicin= aminoglycosides
chemotherapy
aspirin
NSAIDs in overdose
what pitch is lost in Meniere’s disease?
low
how can trauma cause SNHL?
temporal bone affects facial nerve- battle sign
