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KMID : 1040020130040010015
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International Journal of Pain
2013 Volume.4 No. 1 p.15 ~ p.22
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The Effects of Continuous and Pulsed Radiofrequency Ablation on Facetogenic Back Pain
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Weinman Beth Marie
Wu Hong
Tarima Sergey
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Abstract
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Bacground: To investigate the effects of continuous and pulsed radiofrequency ablation on facetogenic back pain in subjects who underwent both procedures.
Methods: 12 subjects were selected from 2 outpatient pain clinics. Subjects had undergone pulsed radiofrequency ablation (PRF) in the lumbar spine from 2004 to 2008 then subsequently underwent continuous radiofrequency ablation (CRF) in the lumbar spine from 2008 to 2011 for treatment of lumbar facetogenic pain. Visual Analog Scale category (VAS-C) pre-procedure, immediately post-procedure and at 1, 2, 3, 6 and 9 months post-procedure were documented and statistically analyzed. A linear mixed model was used to explore clinical predictors of VAS-C change.
Results: Subjects included 9 females and 3 males. Mean age was 51.7 for PRF and 53.9 for CRF. Statistically significant changes in VAS-C for CRF were seen immediately and 3 month post procedure, and statistically significant changes were seen for PRF up to 3 months. However, there were no statistically significant differences in VAS-C when comparing CRF to PRF at the pre-procedure time point to all post-procedure time points. The linear model revealed three factors to be significant predictors of poor RFA response: duration of pain prior to CRF or PRF greater than 24 months (P < 0.01), the location of CRF or PRF was unilateral at L3-S1 level (P < 0.01) and the use of CRF instead of PRF (P = 0.04).
Conclusions: Both CRF and PRF are effective in controlling facetogenic low back pain, but there is no long-term difference between the two treatments.
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KEYWORD
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radiofrequency ablation, facet, back, pain
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