exam 3 - hearing
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what does cerumen do
protects and lubricates the ear canal
along with hair follicles, help protect the eardrum and mid ear
what's the best way to keep cerumen removable
soap and water
sound does not get from external to internal ear. type of hearing loss?
conductive hearing loss
what can cause conductive hearing loss?
- 1. obstruction
- 2. perforation
- 3. scarring/tumors of mid ear
- 4. inflammation
will hearing aid help with conductive hearing loss?
with conductive hearing loss, which frequencies are lost?
all frequencies are lost
will a hearing aid help with sensorineural hearing loss?
this type of hearing loss occurs when the inner ear or auditory nerve (cranial nerve VIII) is damaged
sensorineural hearing loss
what can cause sensorineural hearing loss?
- 1. ototoxic drugs
- 2. noise exposure (damage hair cells of cochlea)
will hearing aids help with SENSORINEURAL HEARING LOSS?
*this type of hearing loss is often permanent
this type of sensorineural hearing loss occurs as a result of aging
deficiencies in what vitamins or supplements appear to play a role in presbycusis?
vit b12 and folic acid
this hearing loss is caused by
-breakdown or atrophy of the nerve cells in the cochlea,
-loss of elasticity of the basilar membrane, or
-decrease in blood supply to the inner ear
-degeneration of hair cells of cochlea
will hearing aids help with presbycusis?
what are the 3 features of meniere's disease
- 1. tinnitus
- 2. one sided sensorineural hearing loss
- 3. vertigo (occurring in attacks that can last for days)
what's the #1 NDx for Meniere's disease?
risk for injury (r/t vertigo)
what's the pathology of MENIERE'S DISEASE?
excess of endolymphatic fluids IN OTHER WORDS.............
*excess fluid volume in inner ears
the problem with meniere's disease in fluid transport in ear
what causes meniere's disease?
** often occurs w/ infection, allergic rxns, fluid imbalances, LT stress
risk factors for MENIERE'S DISEASE
- 20-50 yrs old
- white people
MENIERE'S DISEASE: manifestations before an attack?
- 1. ha
- 2. increase tinnitus
- 3. fullness in ear
- 4. usually on sided manifestation
- 5. vertigo
- 6. n/v
- 7. hypotension
- 8. sweating
- 9. nystagmus
describe hearing loss with menieres. what frequencies are lost first?
- 1. low frequency hearing loss occurs first
- 2. worsens to include all levels after rptd episodes
*early stages of menieres, hearing is normal/near normal
*hearing loss may become permanent as attacks increase
nutrition therapy aims to do what?
stabilize body fluid levels to prevent excess endolymph accumulation
what kind of diet?
- 1. distribute food and fluid intake evenly thruout day
- 2. avoid high salt
- 3. drink adequate amts of fluid (low sugar)
- 4. limit etoh to 1glass/day
- 5. avoid msg
drug therapy aims to do what?
control vertigo and vomiting & restore normal balance
drug therapy.. what drugs?
- 1. diuretics (decrease fluid volume)
- 2. scopolamin patch (decrease N/V)
- 3. CNS depressants (calm pt)
- 1. relieve pressure
- 2. shunts
- 3. neurectomy
- 4. labyrinthectomy
What would you like to do?
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