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Stenosis
Overview
| Causes | Symptoms
| Diagnosis | Treatment
| FAQ
Overview
Stenosis is a condition that can develop as a person
ages, particularly in those over 50. It is characterized by a narrowing
of the spinal canal, which places pressure on the spinal cord and nerves,
because there is not enough room for them. It resembles placing a ring
on your finger. If the finger becomes injured or inflamed, the ring
constricts and causes pain. The pain caused by stenosis is typically
focused in the low back area and can shoot down the legs and flare up
after walking or exercising.
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Causes
Narrowing of the spinal canal may be genetic. However,
the primary contributing factor to the development of stenosis is degenerative
disc disease. As the spine undergoes changes in stability, density and
size, this can result in less space for and more pressure on the spinal
structures.
When one area of the spine is injured, it is more likely
that spinal health in other areas will fail. Conditions that may encourage
the development of stenosis include scoliosis, osteoarthritis, rheumatoid
arthritis, spinal tumors and trauma.
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Symptoms
Symptoms of stenosis include a deep aching in the
low back, buttocks and thigh, and intense numbness or pain in the legs
and sometimes the shoulders. Symptoms can be brought on by walking and
exercise. If you have stenosis, you may notice that pain is sometimes
relieved by sitting or by a position in which the spine is flexed forward
and bending over. Consequently, people with stenosis may walk with a
hunched over posture and find that their pain worsens when bending backward.
Severe cases of stenosis will display more serious symptoms such as
loss of bowel and bladder function and loss of feeling in an arm/leg.
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Diagnosis
Outlined below are some of the diagnostic tools that
your physician may use to gain insight into your condition and determine
the best treatment plan for your condition.
- Medical history: Conducting a detailed medical history
helps the doctor better understand the possible causes of your back
and neck pain which can help outline the most appropriate treatment.
- Physical exam: During the physical exam, your physician
will try to pinpoint the source of pain. Simple tests for flexibility
and muscle strength may also be conducted.
- X-rays are usually the first step in diagnostic testing
methods. X-rays show bones and the space between bones. They are of
limited value, however, since they do not show muscles and ligaments.
- MRI (magnetic resonance imaging) uses a magnetic field
and radio waves to generate highly detailed pictures of the inside
of your body. Since X-rays only show bones, MRIs are needed to visualize
soft tissues like discs in the spine. This type of imaging is very
safe and usually pain-free.
- CT scan/myelogram: A CT scan is similar to an MRI in
that it provides diagnostic information about the internal structures
of the spine. A myelogram is used to diagnose a bulging disc, tumor,
or changes in the bones surrounding the spinal cord or nerves. A local
anesthetic is injected into the low back to numb the area. A lumbar
puncture (spinal tap) is then performed. A dye is injected into the
spinal canal to reveal where problems lie.
- Electrodiagnostics: Electrical testing of the nerves
and spinal cord may be performed as part of a diagnostic workup. These
tests, called electromyography (EMG) or somato sensory evoked potentials
(SSEP), assist your doctor in understanding how your nerves or spinal
cord are affected by your condition.
- Bone scan: Bone imaging is used to detect infection,
malignancy, fractures and arthritis in any part of the skeleton. Bone
scans are also used for finding lesions for biopsy or excision.
- Discography is used to determine the internal structure
of a disc. It is performed by using a local anesthetic and injecting
a dye into the disc under X-ray guidance. An X-ray and CT scan are
performed to view the disc composition to determine if its structure
is normal or abnormal. In addition to the disc appearance, your doctor
will note any pain associated with this injection. The benefit of
a discogram is that it enables the physician to confirm the disc level
that is causing your pain. This ensures that surgery will be more
successful and reduces the risk of operating on the wrong disc.
- Injections: Pain-relieving injections can relieve back
pain and give the physician important information about your problem,
as well as provide a bridge therapy.
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Treatment
In many cases, changing posture and using spinal
injections can control the symptoms for a long period of time. Stenosis
can be treated nonsurgically, but some cases require surgery in order
to create more space around the nerves.
Pain can be relieved by flexing forward and bending over.
Taking anti-inflammatories may be beneficial, especially ibuprofen products
like Advil or Nuprin. Acetominophen (Tylenol) can be taken for pain,
if you are allergic to ibuprofen. A physical therapy program can be
followed that incorporates stretches and movements that extend the spine.
Injections may be used to reduce inflammation and control pain symptoms.
Try our home remedy exercises provided. Stop if they cause an increase
in pain or symptoms.
The most common surgery to treat stenosis is called a
laminectomy, which helps create more space for the surrounding spinal
nerves.
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FAQs
What causes spinal stenosis?
Although degenerating discs are the most common cause
of spinal stenosis, spinal tumors, injury, bone disease and other conditions
can lead to stenosis as well. For example, primary stenosis results
from diseases that are present at birth, while acquired stenosis is
typically the result of degeneration in the spine.
When should I see a doctor?
If pain interferes with your daily activities, you should consult a
spine specialist to treat your stenosis. Leg pain that worsens is
especially an indicator of spinal stenosis. This type of pain is
not a normal part of the aging process.
What should I expect from treatment?
Treatment for spinal stenosis aims at minimizing
the effects and symptoms of the stenosis but does not stop the progression
of degenerative changes. Adopting a healthy lifestyle that includes
exercise can help prevent disc degeneration. Click
here to learn more about degenerative disc disease.
When is surgery seriously considered?
If your pain is severe enough or if walking has
become difficult, your physician may consider surgery as an option
for you. However, nonsurgical, conservative treatments are usually
effective at treating spinal stenosis.
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