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-> Epidural Steroid Injection
WHAT IS AN EPIDURAL INJECTION?
The epidural space is located outside the lining
of the spinal cord. Medications such as corticosteroids and /or local
anesthetics are injected in the epidural space by the way of a
needle or catheter.
WHAT IS THE PURPOSE OF AN EPIDURAL STEROID INJECTION?
The corticosteroid injected reduces the
inflammation and/or swelling of the nerves in the Epidural
space. This may reduce the pain, tingling, numbness, and other
symptoms caused by nerve inflammation and /or irritation and
swelling.
WHAT TYPE OF CONDITIONS ARE EPIDURAL STEROID INJECTIONS USED TO
TREAT PAIN?
Epidural steroid injections are used to treat
conditions that affect the spine from the neck to the lower
back. These conditions include herniated discs, protruding
discs, degenerated disc, osteoarthritis of the spine, spinal
stenosis, and scar tissue or other changes following neck or
lower back surgery. Patient symptoms include pain in the neck,
shoulder, middle or low back, arms, or legs. Patients may also
have symptoms of numbness or weakness in the extremities.
HOW IS THE INJECTION PERFORMED?
Your procedure will be scheduled at a facility
where the Physician will perform the procedure. After you have
been checked in by the nurse and the paper work has been
completed, the nurse will start an IV in your arm so the doctor
can give you some sedating medication. The medications
normally used for this procedure are called Versed and Fentanyl.
They are short acting sedatives which will allow you to take a
short nap. During the injection your blood pressure, pulse and
breathing will be monitored by the nurse or anesthesiologist.
The nurse will help you put on an oxygen cannula before being
sedated to provide some supplemental oxygen while you are
resting. This may smell like plastic and tickle your nose.
The procedure involves inserting a needle
through the skin and deeper tissues so there is some discomfort
from the placement of the needle, but the above medications will
help with the pain.
WILL THE INJECTION(S) HURT?
There is minimal discomfort with the injection.
You may experience an increase in your pain until the medication
takes effect, usually within 24-72 hours after the injection. You will
need to take your pain medication or an OTC medication for the
discomfort for the first day. A small ice pack may help relieve
the discomfort of the needle insertion site for the first 24
hours. It is not unusual for the tenderness to last 1-3 days
following the injection. If the pain persists after 24 hours a
heating pad may feel good to your back.
WHAT ARE THE SIDE EFFECTS AND RISKS ASSOCIATED WITH EPIDURAL
INJECTIONS?
The risks involved include the
following-infection, bleeding, bleeding inside the Epidural
space with nerve damage and worsening of your symptoms.
Diabetics may notice an increase in their blood sugars and
should monitor this closely. Other side effect include water
retention and general discomfort.
The procedure is performed under sterile
conditions and the use of x-ray to guide the needle
placement. However, it does have some risk due to the
location of the needle placement and the medications used. The risks are low with this type of
procedure.
HOW LONG DOES IT TAKE FOR THE INJECTION TO WORK?
If the physician uses a local anesthetic medication with
the steroid, you may notice immediate relief or significantly diminished
pain after the injection. However this local
medication will wear off and the steroid will take 24-72 hours
to start working. Your pain will return and you may have a
"sore back" for a day or two. Some patients may take
up to seven days to notice the full effect of the medication.
Most patients do experience partial relief after the first
injection. Subsequent injections are performed to increase the
degree of pain relief.
HOW LONG DOES THE PAIN RELIEF LAST?
The injected steroids are
fat-soluble and generally are active for about one month.
Clinical relief depends on several factors. The most important
is the nature of the patient’s condition. Healing after injury
may take 6 months to one year. In other cases, the condition is
chronic and injections may be needed on an intermittent basis
(up to three times a year). You will be encouraged to go through
physical therapy for strengthening exercises during the period
of time when the pain has been reduced. You should continue
these exercises on your own at home.
WHAT ABOUT PHYSICAL THERAPY?
Physical therapy and rehabilitation is essential
in treating many patients with spinal conditions. By making the
muscles around a spine into a "muscular corset" loads
can be reduced on the nerves, disks, and joints of the spine.
One of the major goals of the epidural steroid injection is to
reduce pain and allow the patient to participate more
effectively in physical therapy.
Weight loss is also recommended to help reduce the
natural stress on the body from an excessive amount of weight.
WHAT IF I DO NOT HAVE ANY RELIEF FROM THE EPIDURAL INJECTIONS?
If you do not receive any benefit from the epidural
injection, other structures may be responsible for your pain.
This could include the disk, joints, ligaments, or muscles
surrounding the spine. You may require further imaging studies
or other diagnostic injections to better identify and treat the
source of your pain.
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