What Is Rhizotomy?
Rhizotomy, also referred to as radiofrequency ablation (RFA), is a minimally invasive outpatient procedure that uses radiofrequency energy to heat and disrupt the medial branch nerves responsible for transmitting pain signals from the facet joints to the brain. Once disrupted, those nerves can no longer carry that signal, typically producing relief that lasts between nine months and two years.
How Rhizotomy Differs From Injections
Injections manage pain by delivering medication that reduces inflammation or temporarily blocks the nerve signal. The benefit is real, but it is limited by how long the medication stays active. Rhizotomy works through a different mechanism entirely. It does not rely on medication wearing off or being replenished, but physically disrupts the nerve responsible for transmitting the pain, producing a more durable result. For patients whose diagnostic blocks have confirmed the facet joints as the source but whose relief has proven too brief, that durability is precisely what rhizotomy offers.
The Role of Prior Diagnostic Blocks
Rhizotomy is not performed without first establishing, through medial branch block injections, that the facet joints are genuinely the primary source of a patient's pain. Most clinical protocols require two separate positive block responses before rhizotomy is recommended, a standard that ensures the procedure is applied only where the diagnostic evidence clearly supports it. At our West Orange location, that diagnostic requirement is not a bureaucratic step; it is the foundation on which the procedure's effectiveness depends.
How Rhizotomy Works
The procedure is performed on an outpatient basis under local anesthesia with mild sedation for comfort. The patient lies face down while the treatment area is cleaned and numbed. Using fluoroscopic guidance, a specialized needle is positioned precisely alongside the targeted medial branch nerves.
A small electrical current is applied first to confirm correct needle placement, typically producing a brief muscle twitch or mild sensation. Once placement is confirmed, local anesthetic is administered, and radiofrequency energy is delivered through the needle tip, generating controlled heat that disrupts the nerve's ability to transmit pain signals. The full procedure typically takes less than an hour, and most patients are home the same day.