[Results of CT-guided periradicular pain therapy]

The effectiveness of CT-guided periradicular pain therapy was studied.

55 patients with lumbar and/or radicular pain were treated by periradicular injections of 40 ml triamcinolon, in some cases combined with injection of the facets of the lumbar vertebrae. 36 patients had chronic symptoms; in 7, these were acute, and 12 patients complained of renewed disc symptoms following previous disc surgery. Approximately 4 months after the conclusion of treatment, the patients were requested to complete a questionnaire giving information on the course and after-effects of treatment. The questionnaire was repeated after 5 months.

55% of patients were free of symptoms or had had some improvement at the time of the questionnaire; 30% reported temporary improvement, and in 15% there was no change compared with the pre-treatment symptoms. At the time of the second questionnaire, the proportion of patients who had derived benefit from the treatment was somewhat lower, 49% reported that they were pain-free or improved, while temporary improvement was reported by 36% of patients.

CT-guided periradicular pain therapy is a valuable procedure in patients in whom conservative measures prove ineffective, and when surgery is not indicated. However, only about half the treated patients maintain permanent improvement.