Radiofrequency ablation uses heat from radio waves to switch off the small nerves that carry pain from a specific joint, most often a facet joint in the spine. It is done with a needle under live X-ray guidance, takes thirty to sixty minutes, and you go home the same day. Relief usually lasts six months to two years, and the procedure can be repeated when the nerve grows back.
Why it works on spinal pain
Each vertebra connects to the one above and below it through two small facet joints at the back of the spine. These joints are sized like knuckles, are lined with cartilage, and wear out with age exactly as knees do. When they become arthritic they produce a deep, aching pain that is worse with standing, bending backward and twisting, and better when sitting or leaning forward. Facet joints account for a substantial share of chronic low back pain and neck pain, particularly after the age of fifty.
Each facet joint is supplied by a tiny nerve branch called a medial branch. That nerve does one job: it carries sensation from the joint. It does not control muscle and it does not supply skin. That is what makes it a good target. Interrupting it removes the pain signal from the arthritic joint without weakening anything or numbing your leg.
The diagnostic step comes first
Nobody should have an ablation without a diagnostic nerve block first, usually two. In that test, a small amount of local anesthetic is placed precisely on the medial branch nerve. If the right nerve has been blocked, your pain should drop by at least half for the few hours the anesthetic lasts. You will be asked to keep a simple log of your pain hour by hour afterward.
That result is the whole basis for proceeding. A block that relieves your pain confirms the diagnosis and predicts that the ablation will work. A block that changes nothing tells you the facet joint was not the source, which saves you from a procedure that was never going to help. It is a short test that prevents a long disappointment.
Who is a candidate
- Chronic low back pain or neck pain lasting more than six months from facet joint arthritis
- Sacroiliac joint pain that responded to diagnostic injections
- Whiplash-type neck pain after a car accident that has not settled with therapy
- Knee osteoarthritis pain in patients who are not candidates for or not ready for joint replacement
- Patients who had good but short-lived relief from steroid injections
- Patients who want to come off daily pain medication
It is not the right procedure for pain caused by a herniated disc pressing on a nerve root, which is treated with an epidural steroid injection, nor for spinal stenosis with leg symptoms, nor for pain arising from muscle, which responds better to a trigger point injection and rehabilitation.
What the procedure is like
You lie face down on a fluoroscopy table. The skin is cleaned and numbed with local anesthetic, which stings briefly. A thin insulated needle with an exposed tip is then guided to the target nerve using real-time X-ray, and the position is checked from multiple angles.
Before any heat is applied, the physician tests the position electrically. A low current is passed through the needle to confirm that it is next to the sensory nerve and safely away from any motor nerve. You may feel a tingle or a mild thumping in the back during this. Then the tip is heated to roughly eighty degrees Celsius for about ninety seconds, which creates a small precise lesion on the nerve. Most patients report pressure and warmth rather than pain. Light sedation is available but most people do not need it.
Several levels are usually treated in one session, since each facet joint receives supply from two medial branches. Total time on the table is thirty to sixty minutes.
Recovery and timing of relief
You are monitored for about twenty minutes and then go home. Arrange a ride if you had sedation. Most patients return to normal activity within twenty four to forty eight hours, and to desk work the next day.
Expect some soreness at the treatment site for three to seven days, occasionally with a temporary flare of the original pain as the nerve settles. Ice for the first two days, heat afterward, and ordinary over the counter pain relief handle it. This early soreness is not a sign that the procedure failed.
Relief builds over one to three weeks rather than arriving immediately. That delay is normal and reflects how long the treated nerve takes to stop conducting fully. Once established, relief typically lasts six months to two years. The nerve does eventually regenerate, and when the pain returns the ablation can be repeated safely, often with similar results.
The ablation buys you a window without pain. The patients who use that window to strengthen the spine are the ones who need it repeated least often.
Risks, stated plainly
Radiofrequency ablation has a strong safety record, but no procedure is free of risk. Temporary increased pain for a week or two is the most common complaint. Bruising and tenderness at the needle site are expected. Infection is rare and is minimized by sterile technique. A small number of patients develop a patch of numbness or a sunburn-like sensitivity over the treated area, which usually fades over weeks. Nerve injury causing weakness is very uncommon when motor testing is performed before the lesion, which is why that step is not optional.
Tell the office if you take blood thinners, have an active infection, are pregnant, or have poorly controlled diabetes, since each of these changes the plan or the timing.
Coverage and scheduling
Most major insurance plans, Medicare, workers' compensation and auto accident coverage pay for radiofrequency ablation when a diagnostic block has confirmed the target. Insurers generally require documentation of that block, which is one more reason the diagnostic step matters. NJ Pain & Spine verifies coverage before scheduling, and performs the procedure at the Clifton, Jersey City and Edison offices.