What
is Otosclerosis?
Otosclerosis
is a disease in which there is abnormal hardening of the bone of the ear.
This hardening causes the third middle ear bone, known as the stapes, to
become fixed. Fixation of the stapes prevents it from moving and thus,
prevents the transmission of sound of the middle ear to the inner ear.
What
causes Otosclerosis?
There
are many interesting studies that pertain to the abnormalities of bone
in the ear. We know that otosclerosis is an inherited disorder and that
many people with this disorder will report similar symptoms in their parents
or siblings. Other patients report no family history of this disorder.
This is not because their family members were not affected by otosclerosis,
but rather because the hardening of the bone within the ear did not take
place in the region of the stapes.
How
is otosclerosis diagnosed?
Otosclerosis
is diagnosed by a combination of the patient history, physical examination,
and a hearing test that shows significant middle ear (conductive) hearing
loss. This diagnosis can only be confirmed at the time of surgery when
the abnormal bony growth is visualized within the middle ear.
What
are the treatments for Otosclerosis?
Patients
with a mild degree of hearing loss may require no immediate treatment.
However, when the hearing loss becomes substantial, it is advisable for
the patient to obtain some form of treatment to improve their hearing.
The following are options for patients with otosclerosis.
Hearing
Aids
Hearing
aids will amplify sounds so that they are better heard by the patient.
Given that the inner ear is usually normal in otosclerosis, hearing aids
work very well for patients with this disorder. The advantage of a hearing
aid is that wearing them bares no risk to the patient and the patient does
not have to undergo any surgery. However, the hearing aid will have to
be worn throughout the remainder of the patient's life and can be somewhat
of an inconvenience. While hearing aids remains a safe and effective treatment
for most forms of otosclerosis, many patients prefer not to be burdened
by wearing these devices permanently.
Stapedectomy
Operation
This
operation, in which the abnormal stapes is replaced by an artificial bone
of hearing, is one of the most gratifying procedures performed by ear surgeons.
This surgical procedure has been performed and refined over the past 40
years offers the patient with otosclerosis normal or near normal hearing.
We routinely perform this operation under general anesthetic and through
the ear canal utilizing the microscope. We lift the eardrum and analyze
the stapes under a microscope to confirm the diagnosis of otosclerosis.
Once the diagnosis is confirmed, the abnormal stapes is removed and is
replaced by an artificial one. This procedure is performed as outpatient
surgery and generally takes between one to one half hours.
What
can I expect after the operation?
A
slight amount of pain and dizziness is normal after the operation. Call
our office immediately if these symptoms are getting worse rather than
improving. Hearing will not return to normal immediately after the
surgery as a small amount of packing will be in the ear for the first week
after the operation. Call our office immediately if you notice any
drop in hearing.
Keep
the ear dry after surgery. Plug the ear with a cotton ball coated
with vaseline when you are showering or washing your hair. Avoid
straining for the first 2 weeks after surgery, that is, no heavy lifting
and sneeze with an open mouth. Avoid air travel until cleared by
your surgeon.
What
are the complications of surgery?
Although,
the stapedectomy is one of the most gratifying surgeries for both patient
and surgeon, there are certain potential complications of this surgery
which must be considered by the patient prior to embarking on this course
of treatment. All of these complications are rare, occurring in one percent
or less of cases. When replacing the stapes, the inner ear is temporarily
opened to allow for the replacement of the new artificial bone of hearing.
Damage can occur to the inner ear at this point in the procedure and in
a small minority of cases hearing loss will actually worsen as a result
of surgery. If the inner ear was adversely affected by the surgery, then
the patient may develop spinning vertigo on rare occasions. In addition,
the nerve that supplies the facial muscles passes through the ear. Anytime
ear surgery is done this nerve is at a slight risk. We are very careful
to identify the nerve and any abnormality in its course, however, although
rare, the facial nerve can be damaged as a result of this surgery. A small
nerve that supplies taste to the anterior one-half of the tongue passes
through the inner ear in the vicinity of the stapes. Sometimes this nerve
must be moved in order to better access the stapes. When this occurs, this
fine nerve may be damaged leaving a temporary alteration in taste in the
patient.