Abstract
Study design
Prospective experimental uncontrolled trial.
Background
Vertebrogenic pain is a frequently underestimated cause of chronic low back pain (LBP). Vertebral endplate degeneration, characterized by cortical bone damage and subchondral bone inflammatory reaction, is a significant source of LBP, the responsible of the pain transmission being the Basivertebral Nerve (BVN). Radiofrequency ablation of the BVN (BVA) leads to thermal injury of nerve tissue and interruption of the of chronic vertebrogenic pain transmission.
Purpose
The aim of this study is to evaluate the effectiveness, in terms of pain and disability reduction, of percutaneous (BVA) in treating patients affected by vertebrogenic chronic LBP. Moreover, as a secondary endpoint, the purpose is to assess the feasibility and safety of a percutaneous CT-guided technique.
Methods
We performed percutaneous CT-guided BVN ablation in 56 consecutive patients presenting with vertebrogenic chronic LBP in local anesthesia using an articulating bipolar radiofrequency electrode (STAR™ Tumor Ablation System Merit). A 1-month follow-up MRI was performed to evaluate the ablation area in order to assess the target success of the procedure. A 3-month follow-up CT study was performed to evaluate bone mineral density in order to exclude structural bone abnormalities that might have been induced by the treatment. Pre- and post-procedure pain and disability levels were measured using the visual analogue scale (VAS) and Oswestry Disability Index (ODI). A 2-cm improvement threshold was set as clinical success for the VAS score and a 10-point improvement threshold was set as clinical success for the ODI score.
Results
At 3- and 12-month follow-up, VAS and ODI scores decreased significantly compared to baseline. Clinical success was reached in 54/56 patients (96.5%) for pain and 54/56 patients (96.5%) for disability, exceeding significantly the MCID. CT-assisted targeting of the ablation zone was determined successful in 100% of patients. Mean operative time was 32 min. No immediate or delayed complications were detected.
Conclusions
Percutaneous CT-guided intra-osseous BVA seems to be a safe, fast, and powerful technique for pain relief in patients with vertebrogenic chronic LBP, when the selection of patients is based on a multidisciplinary approach including both conventional Diagnostic Radiology and Nuclear Medicine imaging.
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De Vivo, A.E., D’Agostino, G., D’Anna, G. et al. Intra-osseous basivertebral nerve radiofrequency ablation (BVA) for the treatment of vertebrogenic chronic low back pain. Neuroradiology 63, 809–815 (2021). https://doi.org/10.1007/s00234-020-02577-8
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DOI: https://doi.org/10.1007/s00234-020-02577-8