What
is a Facet Joint Injection?
Facet Joint Injection is an injection of a long acting steroid
and local anesthetic in the facet joints llocated in the
back area as a part of the bony structure. This is done by using
x-ray so that the joints can be identified.
What
is the purpose of it?
The injected steroid reduces the
inflammation and/or swelling of the tissue in the joint space.
This may in turn reduce pain and other symptoms caused by
inflammation/irritation of the joint and surrounding structures.
How
long does the injection take?
The actual procedure takes about
30 minutes, but patients should be prepared to stay for two to three hours.
What
is actually injected?
A mixture of depo-medrol
(steroid) and bupivacaine (local anesthetic).
Will
the injection(s) hurt?
The procedure involves
inserting a needle through skin and deeper tissues so there is
some discomfort involved. However, the skin and deeper tissues
are numbed with a local anesthetic using a very thin needle
prior to inserting the needle into the joint. Most patients also
receive intravenous sedation during the procedure which makes
the procedure easy to tolerate.
Will
I be "put out" for the procedure?
Before the procedure, an IV will
be started. During the procedure, most patients will
receive intravenous sedation, which makes the procedure easy to
tolerate. The amount of sedation given generally depends on
a patient's tolerance and medical conditions.
How
is the injection performed?
Patients are monitored with
EKG, a blood pressure cuff, and blood oxygen monitoring device. The
back is cleaned with an antiseptic solution. The injection
is then carried out under x-ray guidance. After the injection,
patients are
placed on their back or side and monitored for about an hour.
What
should I expect after the injection?
Immediately after the injection,
you may feel that your pain is greatly reduced or gone. This is
because of the local anesthetic injected and will last only for a few hours. Your pain will return and you will
have a "sore back" for a day or two. Soreness is caused
by the
mechanical process of needle insertion as well as initial
irritation from the steroid itself. You should start noticing pain
relief within three to four days. Also, most people have some
muscle spasms for the first 48 hours after the block. These spasms
are treated with muscle relaxants and heating pads.
What
should I do after the procedure?
You will need someone to drive
you home. We advise patients to limit activity for the rest of the
day after the injection. We discourage driving and walking for
the first 24 hours.
Can
I return to work the next day?
You should be able to return to
normal activities the next day.
How
long will the effect of the medication last?
The immediate effect is usually
from the local anesthetic injected. This wears off in a few hours.
The steroid starts working in about three to fours days, and its
effect can last for several days to a few months.
How
many injections do I need to have?
Most patients have the first
injection, followed one month later by another injection, and then
a third injection at three months, if the injections are beneficial. Further
injections may be needed and will be scheduled depending on the
amount and duration of pain relief.
Can
I have more than three injections?
Generally, we perform three to
four injections in a year's time. Giving more could increase the
likelihood of side effects from the steroids.
Will
the Facet Joint Injection help me?
It is very difficult to predict
if the injection will indeed help you or not. Generally speaking,
the block is performed on patients who have a history, physical
exam and radiological evidence (MRI, CT, x-ray) consistent with
the facet disease in order to maximize the benefit from the block.
What
are the risks and side effects?
Generally speaking, this
procedure is safe. However, with any procedure there are risks,
side effects, and the possibility of complications. The most common
side effect is temporary pain. The other risks involve
infection, bleeding, possible worsening of symptoms and
allergic reactions. Other risks are related to the side
effects of steroids including weight gain, increase in blood
sugar (mainly in people with diabetes), water retention, suppression of
body's own natural production of cortisone, etc. Fortunately, the
serious side effects and complications are uncommon.
Who
should not have this injection?
If you are allergic to any of the
medications to be injected, or if you have an active infection,
you should not have the injection. If you are on Coumadin, you
should notify the clinic at least five days prior to your
appointment.
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