Comparison of platelet-rich plasma and extracorporeal shock wave therapy in patients with chronic lateral epicondylitis: A prospective, randomized-controlled study

OBJECTIVES: In this study, we aimed to investigate the effectiveness or comparative therapeutic superiority of exercise, extracorporeal shock wave therapy (ESWT), and platelet-rich plasma (PRP) on pain, grip strength and functional activities in chronic lateral epicondylitis (LE). PATIENTS AND METHODS: Between January 2016 and February 2017, a total of 74 patients (14 males, 60 females; mean age; 49.7±7.6 years, range, 26 to 60 years) with chronic LE were included in this prospective, randomized-controlled study. All patients received stretching and eccentric strengthening exercises for three months. The patients were divided into three groups. The first group (Exercises group, n=24) was given home exercises. The second group (ESWT+Exercises group, n=25) received one session of ESWT added once a week for three weeks. The third group (PRP+Exercises group, n=25) received one session of PRP in addition to the exercise program. All patients were evaluated for pain by Visual Analog Scale (VAS), for functionality by Disabilities of Arm, Shoulder and Hand (DASH) questionnaire and Patient-Rated Tennis Elbow Evaluation (PRTEE), handgrip strength by a dynamometer, and extensor tendon thickness by ultrasonography (USG) at baseline and at one, two, three, and six months. RESULTS: A significant improvement was found in the VAS, DASH, PRTEE, handgrip strength values at six months compared to between in all groups (p<0.001). Extensor tendon thickness as assessed by USG indicated no significant difference (p>0.05). Regarding the VAS activity levels, there was a significant difference in the PRP+Exercises group compared to the Exercises group at six months of follow-up (p<0.001). The decrease in the DASH scores during six-month follow-up was significantly higher in the PRP+Exercises group compared to the Exercises group (p=0.004). For the PRTEE scores at six months, the PRP+Exercises group showed a statistically significant improvement than both Exercises (p<0.001) and ESWT+Exercises (p=0.007) groups. CONCLUSION: In the treatment of chronic LE, PRP combined with exercise seems to be superior to exercise or ESWT in terms of pain and functionality in chronic LE patients.