Salim Abboud1, Christos Kosmas2, Ronald Novak2, Mark Robbin2. 1. Department of Radiology, University Hospitals Case Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA. abboud949@gmail.com. 2. Department of Radiology, University Hospitals Case Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA.
Abstract
PURPOSE: Radiofrequency ablation technique for treatment of OO including ablation time and temperature vary greatly between and within reported studies. This study evaluates the immediate and long-term efficacy and complication rate of a two sequential RFA technique for OO. MATERIALS AND METHODS: We retrospectively reviewed medical records and attempted interview follow-up for 25 patients treated with RFA for OO. Each treatment included 2 consecutive RFAs at 90 °C for 6 min with inter-ablation cooling to 40 °C and occasional inter-ablation probe adjustment. Additionally, we statistically compared the proportion of successful ablations using the DCRFA technique with published studies that utilized alternative OO ablation procedures. RESULTS: Long-term follow-up was obtained for 24 patients (96 %). Mean patient age at DCRFA was 17.2 years (range, 2.2-50.0 years). Mean time to follow-up was 60 ± 42 months (range 12-152 months). No acute DCRFA-related complications nor long-term recurrences were reported. All 24 interviewed patients reported partial relief of pre-procedural pain within 1 day of DCRFA and total relief within 1 week of DCRFA. One patient ultimately developed a major late complication (complex regional pain syndrome of the left ankle) after DCRFA of a cuboid lesion. Additionally, the DCRFA success rate was significantly higher when compared to two other published OO RFA treatment results. CONCLUSION: DCRFA employing two sequential 6-min cycles is an effective treatment of OO. The 100 % primary success rate, 0 % long-term recurrence rate, and low complication rate compare favorably and may be superior to results of prior reports.
PURPOSE: Radiofrequency ablation technique for treatment of OO including ablation time and temperature vary greatly between and within reported studies. This study evaluates the immediate and long-term efficacy and complication rate of a two sequential RFA technique for OO. MATERIALS AND METHODS: We retrospectively reviewed medical records and attempted interview follow-up for 25 patients treated with RFA for OO. Each treatment included 2 consecutive RFAs at 90 °C for 6 min with inter-ablation cooling to 40 °C and occasional inter-ablation probe adjustment. Additionally, we statistically compared the proportion of successful ablations using the DCRFA technique with published studies that utilized alternative OO ablation procedures. RESULTS: Long-term follow-up was obtained for 24 patients (96 %). Mean patient age at DCRFA was 17.2 years (range, 2.2-50.0 years). Mean time to follow-up was 60 ± 42 months (range 12-152 months). No acute DCRFA-related complications nor long-term recurrences were reported. All 24 interviewed patients reported partial relief of pre-procedural pain within 1 day of DCRFA and total relief within 1 week of DCRFA. One patient ultimately developed a major late complication (complex regional pain syndrome of the left ankle) after DCRFA of a cuboid lesion. Additionally, the DCRFA success rate was significantly higher when compared to two other published OO RFA treatment results. CONCLUSION:DCRFA employing two sequential 6-min cycles is an effective treatment of OO. The 100 % primary success rate, 0 % long-term recurrence rate, and low complication rate compare favorably and may be superior to results of prior reports.
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