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Causes of Hearing Loss

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Jennifer Davis

on 19 August 2014

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Transcript of Causes of Hearing Loss

Conductive Results from physical problems
with the movement of the sound
wave through the ear Sensorineural Results from damage to the
hair cells or nerves that
sense sound waves Mixed
Hearing Loss Results when a conductive hearing
loss occurs in combination with a sensorineural hearing loss.

In other words, there may be
damage in the outer or middle
ear and in the inner ear (cochlea)
or auditory nerve. Three
Basic Types
Hearing Loss Causes of
Hearing Loss Cerumen (wax) build-up,
hematoma (blood collection),
or foreign body in the ear canal.

This is one of the most common
causes of hearing loss and
the easiest to fix. Obstructed external ear canal Caused by direct trauma such as
a finger or cotton swab,
middle-ear infections (otitis media),
or explosions (blast injury) Perforated tympanic membrane Usually from trauma to the ear Dislocated ossicle
(malleus, incus or stapes) Middle ear infection Otitis media Infection of the ear canal
that causes it to swell Otitis external Usually in divers Barotrauma (pressure trauma)
or ear squeeze Certain drugs can affect hearing by
damaging the nerves involved in
hearing. Usually this occurs when
large or toxic doses are used but may
also occur with lower doses. Ototoxic drugs Children and adults with kidney problems are more susceptible to sensorineural hearing loss. Connection to Kidney Problems A tumor in the auditory nerve. Usually associated with ringing in the ears. Acoustic neuroma Prolonged exposure to loud noises causes the hair cells on the cochlea to become less sensitive Acoustic trauma A fracture of the temporal bone can disrupt the nerves of the auditory system Head trauma includes sickle cell disease, diabetes, leukemia, polycythemia, and diseases in which excessive blood clotting occurs Vascular diseases
(problems with blood vessels) A disease that affects hearing and balance. It is usually associated with tinnitus (ringing in the ears). It has a gradual onset and often progresses to deafness and severe vertigo. The cause is unknown. Ménière disease Antibiotics including aminoglycosides (gentamicin, vancomycin), erythromycins, and minocycline
Diuretics including furosemide and ethacrynic acid
Salicylates (aspirin) and nonsteroidal anti-inflammatories (NSAIDs) such as ibuprofen and naproxen
Antineoplastics (cancer drugs)
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