Introduction and purpose: Patellar tendinopathy is a disease affecting particularly athletes. Platelet-rich plasma (PRP) injections have gained increasing interest for their potential benefits. Anyway, a tendon disease longer than 6 months should be considered as an indication for surgery. The aim of our study was to evaluate the efficacy of PRP in athletes with a severe chronic patellar tendinopathy longer than 6 months when surgery should be chosen. Methods: We enrolled 17 sport practitioners (19 patellar tendons) who did not want to undergo surgery and who are nonresponders to other conservative treatments. We treated them with PRP and calculated the results using the visual analog scale (VAS), the Victorian Institute of Sport Assessment-Patellar (VISA-P) score, and Tegner Activity Scale. Every test has been conducted at T0, T1 (4 months), and T2 (12 months). Results: We found a poor improvement at T1 and a clinical worsening at T2 through VAS. VISA-P showed a medium improvement both at T1 and T2. Tegner scale did not show improvements. Conclusions: Our study was not able to remove the doubts about the benefits of PRP in patellar tendinopathy, confirming ambiguous certainties. Further investigations are needed to assess its effectiveness.
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