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EPIDURAL STEROID BLOCK
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EPIDURAL STEROID BLOCKS: Lumbar, Thoracic, Cervical, or Caudal

What is an epidural steroid injection?
An epidural steroid injection is an injection of an anti-inflammatory steroid (e.g., dexamethasone or triamcinolone) in the epidural space. The epidural space is not an injection into the spinal cord itself. The spinal cord and spinal nerves are in a “sack” containing clear fluid (cerebrospinal fluid). The area outside this “sack” is called the epidural space. An epidural steroid injection is not the same injection as a labor epidural, which is commonly given to women in labor.

Why is it done?
When the nerves in the epidural space are irritated or pinched by a bulging disk, narrowed “nerve canal” or bone spur, the resulting inflammation can cause pain, numbness, or tingling. The steroid injected can reduce inflammation of nerves in the epidural space and thus reduce pain and other symptoms.

How long does it take to do?
The actual injection takes only a few minutes. Please allow about an hour for the procedure; this will include talking to your doctor before the procedure, signing the informed consent, positioning in the room, and observation by the recovery room nurse afterwards.

What medicines are injected?
The injection consists of a mixture of local anesthetic (e.g., bupivacaine) and the steroid medication (triamcinolone – Aristocort® or dexamethasone).

Will it hurt?
All of our procedures begin by injecting a small amount of local anesthetic through a very small needle. It feels like a little pinch and then a slight burning as the local anesthetic starts numbing the skin. After the skin is numb, the procedure needle feels like a bit of pressure at the injection site. If you experience any pain during the procedure, your doctor will inject more local anesthetic as needed.

Will I be “put out" for this procedure?
No. This procedure is done under local anesthesia.

How is it done?
It is typically done with you lying on your stomach. Your blood pressure and oxygenation will be monitored. In addition to your doctor and the x-ray technician, there will be a nurse in the room at all times if you have any questions or discomfort during the procedure. The skin in the back is cleaned with antiseptic solution and then the procedure is done.

What should I expect after the injection?
Immediately after the injection, you may feel your legs becoming slightly heavy or numb. You may notice that your pain may be gone or considerably less. This is due to the effect of the local anesthetic and lasts only for a few hours. Your pain may return and you may have some soreness at the injection site for a day or so. You should start noticing pain relief starting about 1-2 days after the procedure.

What should I do after the procedure?
We advise the patients to take it easy for a day or so after the procedure. Perform the activities as tolerated by you. Your recovery room nurse will advise you about applying ice to the site.

Can I go back to work the same day or the next day?
You should be able to unless the procedure was complicated. Your doctor or recovery room nurse will discuss this with you.

How long does it last?
The long-term effect of the medication cannot be predicted. Usually, the immediate effect is from the local anesthetic injected. This wears off in a few hours. The steroid starts working in about 1-2 days and its effect can last for several days to a few months.

How many injections do I need to have?
The typical series of injections is for about three, spaced about a month apart. You should expect a gradual overall improvement in pain after each injection.

Can I have more than three injections?
After the first series of three injections, if you have not experienced any overall improvement in pain, it is unlikely you will get any further improvement and additional injections will not be helpful. If you get some overall improvement or if your pain relief lasts for at least two months, you may benefit from having about 3-4 injections per year. Injections more often than this are not recommended because of the possibility of side effects from repeated steroid exposure.

How will I know if it will help?
It is very difficult to predict how helpful injections will be. Generally, patients who have
"radicular” symptoms (radiating outward or downward, like sciatica) respond better to
the injections than patients who have only back pain. Patients with recent onset of pain
may respond much better than ones with longstanding pain. Patients with back pain
mainly from bony abnormalities (e.g., a bone spur pressing on a nerve root) may not
respond as well.

What are the risks and side effects?
Overall, this procedure has very few risks. However, as with any procedure, there are some risks and side effects you should know about. Commonly encountered side effects are increased pain from the injection (usually temporary), inadvertent puncture of the
“sack” containing spinal fluid (may cause headaches), infection, bleeding, nerve damage,
or no relief from your usual pain. Side effects of the injected steroid may include weight
gain, increase in blood sugar (mainly in diabetics), water retention, suppression of your
own natural production of steroids, or temporary suppression of your immune system.

Who should not have this injection?
The following patients should not have this injection: if you are allergic to any of the medications to be injected, if you are on a blood-thinning medication (e.g. coumadin, injectable heparin), or if you have an active infection going on.

Do you experience pain? Is your life affected by your pain? For more information and to get treatment, the Utah Pain Specialists are available to schedule medical evaluations at 801-685-PAIN (685-7246).
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