Radiofrequency Ablation (Denervation) Radio frequency ablation is a procedure used to treat chronic painful conditions of the spine and nervous system. An electrode delivers a low voltage, high frequency current to heat up a small area of nerve tissue, which decreases painful signals from that area.. This procedure must be done with fluoroscopy (x-ray). The procedure takes approximately 30 minutes depending on the number of levels that require injection. You will be kept for observation for 30 minutes after the procedure. You should use icepacks to the injection site for the rest of the day. It is suggested that you eat prior to your visit and take any routine medications, unless otherwise instructed by your pain physician. You may ask a family member or friend to drive you home after the procedure, though this is not mandatory. For more information regarding this procedure, please speak to your pain physician at your next scheduled visit.