Radiofrequency (RF) is a form of heat energy used to stop nerve messages from reaching the joint. It has a low rate of complications and can be used at more than one level.
Most patients have half dozen areas heated during the same treatment. Repeating RF treatment to the same area may be needed if the nerve is not completely disabled. A second procedure to heat new levels is possible.
The doctor will use low voltage electrical stimulation to the area first. This confirms that there's a problem and the exact location.