BackgroundMedial and lateral epicondylitis, characterized by repetitive microtraumas to common flexor and extensor tendons respectively, are common causes of elbow pain in adults. Though symptoms generally are self-limiting, 10% of cases are refractory to conservative management, persisting for greater than 18 months and leading to surgery, which can have increased risk of complications. There is minimal data on sustained pain relief and functional benefit for newer non-surgical management options such as minimally invasive needle tenotomy (MINT) via Tenjet and platelet-rich plasma (PRP) for chronic elbow epicondylitis. Additionally, no previously established correlation exists between MRI severity of chronic epicondylitis with pain and functional improvement in MINT and PRP-treated patients. MethodsA retrospective review of 51 adults (n=23 for Tenjet; n=28 for PRP) was conducted to investigate long-term outcomes in pain relief (via Visual Analog Scale or VAS) and improvements in upper extremity function (via Quick Disability of the Arm, Shoulder, and Hand questionnaire or qDASH). These outcomes were correlated with radiographic evidence of epicondylitis severity, assessed by grade of epicondylitis and percentage thickness of tendon tears. ResultsThere were significant improvements in pain (VAS) but no significant differences in function (qDASH) following MINT and PRP. On average, VAS score improved by 2.6 (p<0.001) post-Tenjet and by 3.8 (p<0.001) post-PRP, combined for all follow-up time points. No adverse events were reported over the entire study. A significantly higher percentage of patient-reported pain relief was noted post-Tenjet at all follow-up time points. VAS and qDASH outcomes post-Tenjet and post-PRP were not correlated with initial MRI severity of epicondylitis. ConclusionsThere are multifactorial benefits of both Tenjet and PRP as safe, non-open surgical modalities that can be used, despite MRI severity, to provide sustained pain relief for patients with refractory elbow epicondylitis.
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