Some authors advocate decorticating the non-articular, lateral epicondyle with a shaver to stimulate bleeding and promote a healing response. However, 1 study in our review compared arthroscopic ECRB release with and without decortication and found that decortication significantly increased pain up to 4 weeks postoperatively, increased duration to return to work, and did not improve the ultimate clinical result.25 Of note, others have used a similar rationale to advocate drilling the lateral epicondyle when utilizing an open technique. However, Dunn and colleagues8 note that they have modified the Nirschl technique to eliminate drilling because they feel it increases postoperative pain and may damage the extensor digitorum communis origin.
Among the 6 papers in the percutaneous tenotomy cohort, 2 performed tenotomy with a hypodermic needle, 2 with a scalpel through a limited incision (0.5 cm-1 cm), 1 using a TX1 tissue removal system (Tenex Health), and 1 with a percutaneous radiofrequency probe. In 3 techniques, ultrasound was used to direct the tenotomy.
The quality of this review is also limited by the studies included for analysis, as with any systematic review. Because 28 of the 35 included studies were classified as evidence level IV, the likelihood of methodological bias is increased. The majority of studies contained ≥1 demonstrable biases, including selection, detection, attrition biases, or a combination. Selection bias is prevalent among predominantly level IV studies, in which the authors have selected their preferred surgical technique. There was heterogeneity in the reporting of preoperative variables and the outcome measures that were utilized. Scoring systems, such as the Nirschl Tennis Elbow Score and the Mayo Elbow Performance Index, would have been valuable in comparing the groups had they been more consistently reported. The heterogeneity in clinical outcome tools and the lack of reported outcome variance or standard deviations prevented a formal meta-analysis of some of these outcome measures. Due to inconsistent reporting, we were also unable to test our hypothesis that there would be less pain and improved function in the arthroscopic and/or percutaneous cohorts in the early postoperative period compared to the open cohort due to the less invasive techniques used. Although the differences in DASH and VAS scores at final follow-up likely did not meet the MCID threshold, these differences may have been greater and more clinically relevant in the early postoperative period.
CONCLUSION
We hypothesized that the arthroscopic and percutaneous groups would experience accelerated return to work and reduced pain in the early postoperative period but no difference in ultimate pain, functional outcome, or subjective satisfaction. There is no difference between open, arthroscopic, and percutaneous surgical treatment for lateral epicondylitis regarding return to work and subjective satisfaction; however, open treatment led to a greater percentage of patients being pain free at final follow-up. While arthroscopic treatment led to better pain and functional scores at final follow-up, the absolute differences were quite small and likely not clinically significant. In light of the available evidence, we recommend open débridement as the best means of minimizing cost and achieving a pain-free outcome in the long term. For future investigators, it would be useful to perform a randomized clinical study directly comparing open, arthroscopic, and percutaneous techniques, including assessment of pain and functional scores in the early postoperative period, and to further evaluate differences in cost among the various techniques.
This paper will be judged for the Resident Writer’s Award.