DISCUSSION
The primary purpose of this review was to determine if definitive evidence suggests that any 1 of open, percutaneous, or arthroscopic surgical treatment is superior to the other 2 for relieving pain, improving functionality, restoring strength, or accelerating return to work. The most striking finding of this study was a significantly higher proportion of patients who were pain free at final follow-up in the open group than in the arthroscopic group (70% vs 60%, P = .009) (Table 4). At final follow-up, there were no significant differences between groups regarding duration to return to work, proportion who were improved, proportion who were satisfied or partially satisfied, and complication rate. Average VAS and DASH scores at final follow-up were lower in the arthroscopic group than in the open and percutaneous groups (Figure 2). However, although the difference between mean DASH scores in the arthroscopic and open groups (6.7 points) was statistically significant, it is likely not clinically significant, as the minimal clinically important difference (MCID) for the DASH score is 10 points, as demonstrated by Sorensen and colleagues.38 Although it has not been specifically defined for lateral epicondylitis, the MCID for VAS pain has been reported in the literature to range from 1.0 to 1.4.39-40 Therefore, as for the DASH score, the difference witnessed between the open and arthroscopic groups (0.8) is likely not clinically significant. Of note, the differences between values for arthroscopic and percutaneous techniques are greater than the MCID.
In light of a recent increase in the prevalence of surgical intervention for lateral epicondylitis, many authors have promoted arthroscopic and percutaneous techniques as alternatives to traditional open débridement with the goal of achieving the same results with decreased morbidity and accelerated return to work. Given the increased proportion of patients who were pain free at final follow-up in the open cohort, it is our contention that open release/débridement of the common extensor/ECRB origin allows the surgeon to fully appreciate the extent of tendinotic tissue that is contributing to the patient’s symptoms and to address the pathology in its entirety. Other authors have also questioned whether the full extent of extra-articular tendinosis can be accurately identified arthroscopically. Cummins41 demonstrated, in a series of 18 patients who underwent arthroscopic ECRB débridement, that 6 patients had residual tendinosis upon open evaluation and 10 had residual tendinosis on histologic assessment. Additionally, in the same series, residual tendinopathy was associated with poorer clinical outcomes.
The improved visualization associated with an open technique comes at minimal expense, as the incision was only 1.5 cm to 5 cm in 13 of 15 papers reporting incision length.3,4,6,8-11,13,15,18-20 This increased exposure may not translate into increased morbidity, as there was no increase in the duration to return to work nor the complication rate. As a result of the extensive instrumentation necessary for arthroscopic techniques, open techniques also appear to be less expensive. Analyses in the literature have suggested increased expenditures associated with arthroscopic treatment ranging from 23%42 to 100%43 greater than those of open treatment.
Although obvious, it should be noted that a percutaneous tenotomy does not permit assessment of the extent of pathologic tendinosis. As a result of an inability to visualize and débride pathologic tissue, percutaneous tenotomy rendered inferior outcomes to open and arthroscopic techniques in terms of both postoperative VAS pain score and DASH score. Nonetheless, it is a relatively rapid and simple technique and resulted in zero complications in 184 elbows. Overall, percutaneous tenotomy appears to be an inferior technique to open and arthroscopic techniques in terms of achieving complete pain relief and optimal functional recovery; however, it may be useful in those who wish to avoid a more invasive intervention.
LIMITATIONS
The most significant limitation of this study was the heterogeneity in the techniques utilized in each group. Among the 19 papers in the open cohort, 11 used techniques aimed at lengthening or release of the extensor origin, 7 performed débridement of tendinotic tissue at the ECRB origin, and 1 compared these approaches. Exposures ranged from 1.5 cm to 8 cm in length, 3 techniques added tendon repair following débridement, and 2 utilized a radiofrequency device.
Among the 12 papers in the arthroscopic cohort, 8 performed arthroscopic (inside-out) débridement of the tendinotic tissue at the ECRB origin, 3 performed arthroscopic release of the ECRB tendon, and 1 performed endoscopic ECRB release in an outside-in fashion. Four techniques added posterior synovial plica excision and 4 added decortication of the lateral epicondyle débridement or release. Some authors advocate for arthroscopic intervention on the grounds that it permits evaluation and correction of other intra-articular pathology. With this in mind, some authors have suggested that a synovial fold (plica) adjacent to the radiocapitellar joint may contribute to lateral elbow pain.27,44 Nevertheless, in the only comparative trial in the literature, Rhyou and Kim30 demonstrated that excision of posterior synovial fold failed to enhance pain relief or function in a retrospective cohort study comparing arthroscopic débridement with and without plica excision.
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