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Doctor, Please Explain
Ménière’s Disease
Insight into diagnosis and treatment
Affecting the inner ear, Ménière’s
disease is a condition that causes vertigo (attacks of a
spinning sensation), hearing loss, tinnitus (a roaring, buzzing,
or ringing sound in the ear), and a sensation of fullness in the
affected ear. Because Ménière’s disease affects each person
differently, your doctor will suggest strategies to help reduce
your symptoms and will help you choose the treatment that is
best for you.
What is Ménière’s disease?
Ménière’s disease, also called
idiopathic endolymphatic hydrops, is a disorder of the inner
ear. Although the cause is unknown, it probably results from an
abnormality in the fluids of the inner ear. Ménière’s disease is
one of the most common causes of dizziness originating in the
inner ear. In most cases only one ear is involved, but both ears
may be affected in about 15 percent of patients. Ménière’s
disease typically starts between the ages of 20 and 50 years.
Men and women are affected in equal numbers.
What are the causes?
Although the cause is unknown, it
probably results from an abnormality in the fluids of the inner
ear. The theory is that too much inner ear fluid accumulates
either due to excess production or inadequate absorption. In
some individuals, especially those with involvement of both
ears, allergies or autoimmune disorders may play a role in
producing Ménière’s disease.
People with Ménière’s disease have a
“sick” inner ear and are more sensitive to factors, such as
fatigue and stress that may influence the frequency of attacks.
How is a diagnosis made?
The physician will take a history of
the frequency, duration, severity, and character of your
attacks, the duration of hearing loss or whether it has been
changing, and whether you have had tinnitus or fullness in
either or both ears. When the history has been completed,
diagnostic tests will check your hearing and balance functions.
They may include:
For hearing
For balance
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An ENG (electronystagmograph)
may be performed to evaluate balance function. In a darkened
room, recording electrodes are placed near the eyes. Warm
and cool water or air is gently introduced into each ear
canal. Since the eyes and ears work in coordination through
the nervous system, measurement of eye movements can be used
to test the balance system. In about 50 percent of patients,
the balance function is reduced in the affected ear.
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Rotational testing or balance
platform, may also be performed to evaluate the balance
system.
Other tests
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Electrocochleography (ECoG) may
indicate increased inner ear fluid pressure in some cases of
Ménière’s disease.
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The auditory brain stem response
(ABR), a computerized test of the hearing nerves and brain
pathways, computed tomography (CT) or, magnetic resonance
imaging (MRI) may be needed to rule out a tumor occurring on
the hearing and balance nerve. Such tumors are rare, but
they can cause symptoms similar to Ménière’s disease.
How is it treated?
Treatment may include:
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a low salt diet and a diuretic
(water pill)
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anti-vertigo medications, e.g.,
Antivert® (meclizine generic), or Valium® (diazepam generic)
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intratympanic injections
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a Meniette® device
Your otolaryngologist will help you
choose the treatment that is best for you, as there are things
to consider with each. For example, while anti-vertigo and
anti-nausea medications will reduce dizziness, they may cause
drowsiness. Other treatments also carry both positive
implications as well as drawbacks. Intratympanic injections
involve injecting medication through the eardrum into the middle
ear space where the ear bones reside. This treatment is done in
the otolaryngologist’s office. The treatment includes either
making a temporary opening in the eardrum or placing a tube in
the eardrum. The drug may be administered once or several times.
Medication injected may include gentamicin or corticosteroids.
Gentamicin alleviates dizziness but also carries the possibility
of increased hearing loss in the treated ear that may occur in
some individuals. Corticosteroids do not cause worsening of
hearing loss, but are less effective in alleviating the major
dizzy spells. A Meniette® device is another option. This device
is a mechanical pump that is applied to the person’s ear canal
for five minutes three times a day. A ventilating tube must be
first inserted through the eardrum to allow the pressure
produced by the Meniette® to be transmitted across the round
window membrane and change the pressure in the inner ear. The
success rate of this device has been variable.
When is surgery recommended?
If vertigo attacks are not
controlled by conservative measures and are disabling, one of
the following surgical procedures might be recommended:
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The endolymphatic sac shunt or
decompression procedure is an ear operation that usually
preserves hearing. Attacks of vertigo are controlled in
one-half to two-thirds of cases, but control is not
permanent in all cases. Recovery time after this procedure
is short compared to the other procedures.
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Selective vestibular neurectomy
is a procedure in which the balance nerve is cut as it
leaves the inner ear and goes to the brain. While vertigo
attacks are permanently cured in a high percentage of cases,
patients may continue to experience imbalance. Similar to
endolymphatic sac procedures, hearing function is usually
preserved.
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Labryrinthectomy and eighth
nerve section are procedures in which the balance and
hearing mechanism in the inner ear are destroyed on one
side. This is considered when the patient with Ménière’s
disease has poor hearing in the affected ear.
Labryrinthectomy and eighth nerve section result in the
highest rates for control of vertigo attacks.
Although there is no cure for
Ménière’s disease, the attacks of vertigo can be controlled in
nearly all cases.
What are the symptoms?
Symptoms of Ménière’s disease
include episodic vertigo (attacks of a spinning sensation),
hearing loss, tinnitus (a roaring, buzzing, or ringing sound in
the ear), and a sensation of fullness in the affected ear.
Vertigo is often accompanied by
nausea and vomiting. Attacks may last for 20 minutes to two
hours or longer and fatigue and an off-balance sensation may
last for hours to days. During attacks, patients may be unable
to perform their usual activities, needing to lie down until the
vertigo resolves.
Hearing loss is often intermittent,
occurring mainly at the time of the attacks of vertigo. Loud
sounds may seem distorted and cause discomfort. Usually, the
hearing loss involves mainly the lower pitches, but over time
this often affects tones of all pitches. After months or years
of the disease, hearing loss often becomes permanent.
Tinnitus and fullness of the ear may
come and go with changes in hearing, occur during or just before
attacks, or be constant.
What should I do during an attack?
Lie flat and still and focus on an
unmoving object. Often people fall asleep while lying down and
feel better when they awaken.
How can I reduce the frequency of
Ménière’s disease episodes?
Avoid stress and excess salt
ingestion, caffeine, smoking, and alcohol. Get regular sleep and
eat properly. Remain physically active, but avoid excessive
fatigue. Consult your otolaryngologist about other treatment
options. |