Introduction
Lumbar radiofrequency neurotomy, also known as facet rhizotomy, is a procedure designed to alleviate nerve pain stemming from the spine's lower back joints. It is particularly beneficial for individuals who have found relief through nerve blocks in the past. This treatment effectively "turns off" the specific nerve responsible for transmitting pain signals, providing relief that typically lasts around a year, although some patients may experience longer-lasting effects.
Anatomy
The lumbar region of your spine, located in the lower back, consists of five large vertebrae that form the curve beneath your waist. Each vertebra is connected by pairs of facet joints, which stabilize the spine. The central opening of each vertebra forms the spinal canal, housing the spinal cord. The spinal cord, a critical part of the nervous system, extends from the brain, while spinal nerves emerge from it, sending signals about various bodily functions, including those related to pain from the facet joints.
Causes
The procedure aims to deactivate the medial nerve that transmits pain signals from the facet joints. These joints are susceptible to wear and tear, which can lead to conditions such as osteoarthritis, bone spurs, and enlarged joints, often referred to as facet joint disease or syndrome.
Symptoms
Patients with facet joint syndrome in the lumbar spine may experience pain in the lower back, buttocks, and thighs. This discomfort, along with stiffness, can hinder movement and make activities like standing up from a seated position difficult.
Diagnosis
To diagnose facet joint disease, your doctor will perform a physical examination and may order imaging tests, lab work, and nerve studies. Injection studies can help pinpoint the specific nerve responsible for the pain. Lumbar radiofrequency neurotomy is typically considered only after other treatment options have failed to provide lasting relief. Your physician will determine if this procedure is suitable for your condition.
Treatment
During lumbar radiofrequency neurotomy, heat is applied to create a lesion on the medial nerve, effectively impairing its ability to transmit pain signals. This outpatient procedure involves lying face down while receiving sedation and local anesthetic to numb the treatment area.
Using fluoroscopy, a live X-ray imaging technique, your doctor will guide a thin tube (cannula) to the targeted nerve. A radiofrequency electrode is then introduced through the cannula, and a mild electrical current is used to confirm the electrode's correct positioning by inducing a brief muscle twitch. After confirming the location, numbing medication is injected, followed by heat application to create a lesion in the nerve, disrupting its pain signal transmission.
After the procedure, you will be monitored before returning home, accompanied by someone due to the sedation received. It's important to take care during the recovery period, as your back may feel sore. Your doctor may recommend pain relief measures, including medications, rest, and the use of heat or ice.
The nerves may take three to four weeks to completely deactivate, during which you might experience unusual sensations or discomfort. Lumbar radiofrequency neurotomy generally provides pain relief for about a year or more, and physical therapy may assist in regaining strength and flexibility for a return to normal activities. If pain persists, the procedure can be repeated.
