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HEARING SERVICES |
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Chronic Otitis
Media
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What is
otitis media?
Otitis media
refers to
inflammation
of the middle
ear. When
infection
occurs, the
condition is
called "acute
otitis media."
Acute otitis
media occurs
when a cold,
allergy, or
upper
respiratory
infection, and
the presence
of bacteria or
viruses lead
to the
accumulation
of pus and
mucus behind
the eardrum,
blocking the
Eustachian
tube. This
causes earache
and swelling.
When fluid
forms in the
middle ear,
the condition
is known as "otitis
media with
effusion."
This occurs in
a recovering
ear infection
or when one is
about to
occur. Fluid
can remain in
the ear for
weeks to many
months. When a
discharge from
the ear
persists or
repeatedly
returns, this
is sometimes
called chronic
middle ear
infection.
Fluid can
remain in the
ear up to
three weeks
following the
infection. If
not treated,
chronic ear
infections
have
potentially
serious
consequences
such as
temporary or
permanent
hearing loss.
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How does
otitis media
affect a
child´s
hearing?
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If you
believe
your child
has a
hearing
loss, the
young
patient
should be
examined
by an ear,
nose, and
throat
specialist
at the
earliest
opportunity. |
All
children with
middle ear
infection or
fluid have
some degree of
hearing loss.
The average
hearing loss
in ears with
fluid is 24
decibels...equivalent
to wearing ear
plugs.
(Twenty-four
decibels is
about the
level of the
very softest
of whispers.)
Thicker fluid
can cause much
more loss, up
to 45 decibels
(the range of
conversational
speech).
Your child
may have
hearin g loss
if he or she
is unable to
understand
certain words
and speaks
louder than
normal.
Essentially, a
child
experiencing
hearing loss
from middle
ear infections
will hear
muffled sounds
and
misunderstand
speech rather
than incur a
complete
hearing loss.
Even so, the
consequences
can be
significant -
the young
patient could
permanently
lose the
ability to
consistently
understand
speech in a
noisy
environment
(such as a
classroom)
leading to a
delay in
learning
important
speech and
language
skills.
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Types of hearing loss
Conductive
hearing loss is a form
of hearing impairment
due to a lesion in the
external auditory canal
or middle ear. This form
of hearing loss is
usually temporary and
found in those ages 40
or younger. Untreated
chronic ear infections
can lead to conductive
hearing loss; draining
the infected middle ear
drum will usually return
hearing to normal.
The other form of
hearing loss is
sensorineural hearing
loss, hearing loss due
to a lesion of the
auditory division of the
8th cranial nerve or the
inner ear. Historically,
this condition is most
prevalent in middle age
and older patients;
however, extended
exposure to loud music
can lead to
sensorineural hearing
loss in adolescents.
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When should a hearing test
be performed?
A hearing test should be
performed for children who
have frequent ear
infections, hearing loss
that lasts more than six
weeks, or fluid in the
middle ear for more than
three months. There are a
wide range of medical
devices now available to
test a child´s hearing,
Eustachian tube function,
and reliability of the ear
drum. They include the otoscopy, tympanometer, and
audiometer.
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Do
children
lose their
hearing for
reasons
other than
chronic
otitis
media?
Children can
incur
temporary
hearing loss
for other
reasons than
chronic
middle ear
infection
and
Eustachian
tube
dysfunction.
They
include:
-
Cerumen
impaction
(compressed
earwax)
-
Otitis
externa:
Inflammation
of the
external
auditory
canal,
also
called
“swimmer's
ear.”
-
Cholesteatoma:
A mass
of
horn
shaped
squamous
cell
epithelium
and
cholesterol
in the
middle
ear,
usually
resulting
from
chronic
otitis
media.
-
Otosclerosis:
This
is a
disease
of the
otic
capsule
(bony
labyrinth)
in the
ear,
which
is
more
prevalent
in
adults
and
characterized
by
formation
of
soft,
vascular
bone
leading
to
progressive
conductive
hearing
loss.
It
occurs
due to
fixation
of the
stapes
(bones
in the
ear).
Sensorineural
hearing
loss
may
result
because
of
involvement
of the
cochlear
duct.
-
Trauma:
A
trauma
to the
ear or
head
may
cause
temporary
or
permanent
hearing
loss.
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© 2006 AAO-HNS/AAO-HNSF |
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©
Arnaldo Garro, M.D. 2006
Any information provided on this
Web site should not be considered medical advice or a substitute for a
consultation with a physician. If you have a medical problem, contact your
local physician for diagnosis and
treatment.
web design by
juan
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