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Review
. 2017 Sep 1;29(3):165-171.
doi: 10.5792/ksrr.16.055.

Platelet-Rich Plasma Injections as a Treatment for Refractory Patellar Tendinosis: A Meta-Analysis of Randomised Trials

Leanne Dupley  1 , Charalambos P Charalambous  1   2
Affiliations
Review

Platelet-Rich Plasma Injections as a Treatment for Refractory Patellar Tendinosis: A Meta-Analysis of Randomised Trials

Leanne Dupley et al. Knee Surg Relat Res. .

Abstract

Purpose: Patellar tendinosis (PT) is a common condition amongst athletes. In this study, we perform a meta-analysis on randomised controlled trials (RCTs) to evaluate the use of platelet-rich plasma (PRP) for refractory PT.

Methods: A literature search was undertaken in various databases from their year of inception to October 2015. The primary outcome measure was the Victorian Institute of Sports Assessment-Patella (VISA-P) score.

Results: We identified 2 RCTs comparing PRP injections to alternative treatment options (extracorporeal shockwave therapy [ESWT] and dry needling of the tendon). Meta-analysis showed no significant difference in mean VISA-P scores between PRP injection and control at early assessment (2 or 3 months; estimated difference in means, 11.9; standard error [SE], 7.4; 95% confidence interval [CI], -2.7 to 26.4; p=0.109). However, PRP was statistically better than control with regards to VISA-P scores at longer follow-up (6 months or longer; estimated difference in means, 12.7; SE, 4.4; 95% CI, 4.1 to 21.3; p=0.004).

Conclusions: There is a paucity of RCTs evaluating the role of PRP in PT. Our results suggest that, based on limited evidence, PRP is superior over other established non-surgical treatments (dry needling and ESWT) for refractory PT. Larger RCTs may allow better characterisation of the role of PRP in this condition.

Keywords: Injection; Patella; Platelet-rich plasma; Tendinopathy.

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Conflict of interest statement

Conflict of Interest

No potential conflict of interest relevant to this article was reported.

Figures

Fig. 1
Fig. 1
Literature search and methodology of selection. CINAHL: Cumulative Index to Nursing and Allied Health Literature, CENTRAL: Central Register of Controlled Trials.
Fig. 2
Fig. 2
Meta-analysis of short-term outcomes. CI: confidence interval, PRP: platelet-rich plasma.
Fig. 3
Fig. 3
Meta-analysis of long-term outcomes. CI: confidence interval, PRP: platelet-rich plasma.
See this image and copyright information in PMC

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