Abstract
Objective
This study highlights the effect of a genicular nerve block (GNB) on pain, function, and inflammation outcome measures in rheumatoid arthritis (RA) knees.
Methods
A total of sixty-four patients diagnosed with RA using ACR/EULAR 2010 criteria with unilateral persistent knee arthritis were recruited to the study. They were randomly assigned into two groups: group 1 received GNB and group 2 received intra-articular triamcinolone. Both groups were examined by the SOLAR scoring system, visual analog scale (VAS), and Lysholm score at 0, 2, and 12 weeks. A semi-quantitative score was used to assess the tenderness and swelling at the same intervals.
Results
Function and inflammation improved significantly in group 2 at a 2-week interval as compared to group 1, whereas pain improved in both groups with non-significant differences. After 12 weeks, group 1 showed significant improvement as compared with group 2 for the three outcome measures. Neither the disease activity nor the current medication was related to the GNB effect. Disease duration was negatively related to GNB-induced improvement.
Conclusion
GNB is a new promising local therapy for RA to control pain, improve function, and alleviate inflammation of the knee joint. Although it has a relatively short-term effect, yet it has outperformed the steroid effect.
Key Points • Knee monoarthritis treatment in rheumatoid arthritis is always challenging • GNB has been approved for the treatment of pain in knee osteoarthritis • GNB in this study was able to control active knee arthritis and this effect persisted longer thane intra-articular steroid injection |
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The 1st author designed the study and it was approved and revised by the 2nd and 3rd authors. The 1st and 2nd authors performed US examination and GNB, while the 3rd author did the clinical evaluation and guaranteed blinding of clinical data.
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Elsaman, A.M., Maaty, A. & Hamed, A. Genicular nerve block in rheumatoid arthritis: a randomized clinical trial. Clin Rheumatol 40, 4501–4509 (2021). https://doi.org/10.1007/s10067-021-05821-5
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DOI: https://doi.org/10.1007/s10067-021-05821-5