Abstract
Aims
A systematic review of the available literature comparing the outcomes of radiofrequency denervation to sham procedure in treating chronic low back pain caused by lumber zygapophysial joint pathology.
Methods
Medline and EMBASE databases were searched for English language articles from 2005 to July 2010. Articles were considered for review if they satisfied the inclusion criteria: Randomised Controlled Trials(RCT) comparing radiofrequency neurotomy(RFN) to a ‘placebo’ procedure in patients with chronic low back pain caused by facet joint osteoarthritis. Adult patients of both sexes above 17 years of age who complained of continuous low back pain for more than 6 months with focal tenderness over the facet joints. Outcome measures of interest are pain improvement, physical activity, analgesic use, quality of life variables, range of motion of the lumbar spine and hip movement.
Critical appraisal of the selected studies was carried out using the CASP appraisal tool for RCT.
Results
Two articles were identified. Both demonstrated a statistically significant improvement in the pain (p<0.05) using a visual analogue scale in the RFN group compared to the sham procedure. Only one trial demonstrated a corresponding reduction in analgesic use. There was no consensus of improvement of quality of life factors in either study as compared to placebo.
Conclusion
Radiofrequency denervation is better than sham procedure in treating pain caused by facet joint osteoarthritis with minimal adverse effects in the short term. A higher powered trial using a larger cohort and longer follow up is required to resolve some of the equivocal results.
Conflicts of Interest
None
Source of Funding
None
