Percutaneous radiofrequency facet denervation in low-back and extremity pain.

The present series includes 47 patients (35 females 12 males) with an average observation time of 8 months after percutaneous lumbar facet denervation by radiofrequency electrocoagulation. All patients had static and kinetic lumbar pain; 90% of them had pain radiating into the legs. None had clinical or radiologic (radiculography and/or CT scan) evidence of a lumbar disc herniation, and all had exhausted conservative therapy. All but one had provocation of their habitual pain on arthrography of the relevant intervertebral lumbar joints and/or on intraoperative stimulation prior to electrocoagulation. 22/47 of the patients had no immediate or late beneficial effect of the electrocoagulation. Eight of the remaining 25 patients had satisfactory relief of pain at follow-up. The failures included all patients with previous multiple lumbar operations except for three.