Purpose
The objective of this study is to evaluate the clinical and immunologic effects of
intra-articular doses of platelet-rich plasma (PRP) in arthroscopic hip surgery for
femoroacetabular impingement.
Methods
Preoperatively, patients were randomized either to receive an intra-articular injection
of PRP (group I, n = 30) or not to receive PRP (group II, n = 27) at the end of hip
arthroscopic surgery. To evaluate the clinical outcome and follow-up, we used the
modified Harris Hip Score (mHHS) 3, 6, and 24 months after surgery. Pain was evaluated
using a visual analog scale 24 hours, 48 hours, 3 months, and 6 months after surgery.
The radiologic outcome was analyzed using radiographs and magnetic resonance imaging
(MRI) obtained before surgery and 6 months after surgery. Labral integration and joint
effusion were evaluated with MRI at 6 months. For statistical analysis, an independent
t test and the Wilcoxon rank sum test were used (P < .05 was considered statistically significant).
Results
The visual analog scale score 48 hours after surgery was 3.04 in group I compared
with 5.28 in group II (P < .05). At the 3-month follow-up, the mHHS was 91.79 in group I versus 90.97 in group
II (P = .65). At the 24-month follow-up, the mHHS was 93.41 in group I (P = .56) versus 92.32 in group II (P = .52). At the 6-month follow-up, MRI showed no effusion in 36.7% of patients in
group I versus 21.1% of patients in group II (P = .013). Regarding labral integration, no statistical differences were observed between
the groups (P = .76).
Conclusions
In this randomized study, PRP resulted in lower postoperative pain scores at 48 hours
and fewer joint effusions at 6 months. These findings suggest that PRP may have a
benefit regarding postoperative inflammation; however, the long-term clinical benefit
is unclear.
Level of Evidence
Level II, lesser-quality randomized controlled trial.
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Article info
Publication history
Published online: May 15, 2015
Accepted:
March 18,
2015
Received:
June 17,
2014
Footnotes
The authors report that they have no conflicts of interest in the authorship and publication of this article.
Identification
Copyright
© 2015 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.
