Lumbar: Low back
Sympathetic: A specific type of nerve cluster causing pain
Frequency: Usually repeated 2 weeks after the first injection. This can and may need to be performed a 3rd time based upon your response to the previous injections.
Anesthetic: Local +/- IV sedation
Indications: Pain typically comes from nerves that become irritated after an area of your body is injured usually in one of your extremities. You may experience this as increased sensitivity to touch in the injured area usually in the leg/foot or arm/hand. Initially, this serves as a protective mechanism allowing the area that is irritated to heal. Normally, after the area heals, the pain goes away. However, in certain instances, the increased sensitivity and pain continues even after the area heals. You may experience increased sensitivity to cold and/or weather changes and even notice the extremity feels colder than the other side and may even be a different color. This may be a sign that a group of nerves in your spine may be “overreacting”. In order for the nerves to stop causing you pain, they need to be “reset” thereby interrupting the pain cycle. Think of this as similar to a computer that no longer responds to normal commands. When this occurs, you turn the computer off. By rebooting the system, the computer begins to work normally again.
A lumbar sympathetic block is used to treat nerve pain in the leg/foot that persists despite the area being physically healed. This pain can come after an injury/trauma to the area or even after surgery. A specific nerve can be the cause of pain and/or a group of nerves can be the culprit. The nerve cluster responsible for this pain is actually located in your low back not in your painful extremity. By numbing this specific cluster of nerves, this can stop them from sending the pain signal to your extremity, thereby alleviating your pain. Common conditions that this procedure is used to treat include:
- Complex Regional Pain Syndrome I and II (CRPS Type I and II) formerly known as Reflex Sympathetic Dystrophy (RSD) in the legs/feet
- Phantom limb pain in the lower extremities
- Neuropathic pain syndrome
- Shingles and Post Herpetic Neuralgia
- Poor arterial circulation not associated with significant vascular disease
Contraindications/Reasons why you may not have your injection today:
- Bleeding disorders/low platelet counts
- Medications that thin your blood (please review this section)
- Current infection
- No driver
- Your symptoms have changed and/or improved
- Patient refusal
- Procedure not approved by your insurance
- Poorly controlled high blood pressure that may be giving you symptoms
- Allergies to the any of the medications that is being used
Potential side effects/risks of the procedure:
- Increased pain
- Numbness in lower extremities that is short lived
- Allergic reaction
- Nerve and/or spinal cord injury
- Decrease in your blood pressure
- Heart palpitations
- Puncturing the surrounding organs
Procedure: During the procedure, you will lying on your stomach. An IV may be started to help keep you hydrated and/or if you need sedation. An x-ray machine is used to locate the specific level of the spine which is believed to be causing your pain. After your skin is cleaned with an antiseptic solution, typically betadine unless you are allergic, a series of x-rays will be taken to guide the needle placement. The skin is localized with a local anesthetic which is typically the most painful part of the procedure as this medicine has a tendency to burn when it is injected. After this point, you should only feel pressure. If anything is too painful for you, please tell your physician as more numbing medicine can be given at any time. When the needle approaches the nerve cluster, contrast/dye is injected to confirm that the needle tip is in the correct position and not in a blood vessel. Next, a test dose of local anesthetic solution is slowly injected. If you experience any side effects specifically numbness/tingling around your mouth, ringing in your ears and/or have a metal taste in your mouth, notify your physician immediately. This is a sign that the needle may be in the wrong position. If you do not experience any of the above symptoms, a strong local anesthetic is injected. You may experience increased pressure in your low back during the injection which is normal. If at any time the pain is too intense, please tell your physician to slow down your injection. After the medication is injected, the needle is removed and the procedure is completed. You may experience increased warmth in the painful extremity after the procedure. This is a possible sign that the block has been successful.
Typical length of the procedure: 10 minutes. Expect to be at the clinic no more than 15 minutes after you have been checked in by the medical assistant into the preoperative area. If this is your first injection and/or you have had sedation, you will likely be at the clinic for at least one hour. Please plan accordingly.
How long do you expect pain relief: It is difficult to determine how long and how much pain relief you may experience. It varies depending on multiple factors. Some patients do not gain any relief from the procedure and some may have permanent pain relief. If you experience relief right after this procedure, this can be diagnostic that your pain is coming from the specific nerve(s) that was injected today.
Video of the procedure: