Platelet-Rich Plasma Injections Show Promise for Tennis Elbow Pain Relief
New trial tests whether PRP injections can reduce tennis elbow pain better than standard treatments in 72 participants.
Summary
This completed clinical trial tested whether platelet-rich plasma (PRP) injections could effectively treat tennis elbow, a painful condition affecting forearm tendons. Researchers compared leukocyte-poor PRP against leukocyte-rich PRP and placebo injections in 72 participants over seven years. Tennis elbow causes pain and reduced grip strength, especially in people who perform repetitive wrist movements. Standard treatments like physical therapy and anti-inflammatory medications often provide incomplete relief. PRP therapy uses concentrated platelets from the patient's own blood to potentially accelerate healing. Participants received two injections one week apart and were monitored for over a year using pain scales, functional assessments, and MRI scans to measure tendon healing.
Detailed Summary
This randomized, double-blind, placebo-controlled trial investigated whether platelet-rich plasma (PRP) injections could effectively treat lateral epicondylitis, commonly known as tennis elbow. The condition affects forearm extensor tendons, causing pain, reduced grip strength, and functional impairment, particularly in individuals performing repetitive wrist and forearm movements.
Researchers enrolled 72 participants diagnosed with tennis elbow and randomly assigned them to receive either leukocyte-poor PRP, leukocyte-rich PRP, or saline placebo injections. Each participant received two injections spaced one week apart, with PRP prepared using standardized protocols to ensure consistency across treatments.
The study measured outcomes using multiple assessment tools including visual analog pain scales, Mayo Elbow Score, SECEC Elbow Score, grip strength testing, and MRI scans to evaluate tendon healing. Follow-up evaluations occurred at 12, 24, and 54 weeks post-treatment to monitor pain reduction, functional improvement, and structural tendon changes.
This seven-year study, completed in March 2024, represents important research into regenerative medicine approaches for tendon injuries. Tennis elbow affects millions of people worldwide, and current treatments including physiotherapy, braces, and anti-inflammatory medications often provide incomplete recovery. PRP therapy offers potential advantages by using the patient's own concentrated platelets to stimulate natural healing processes.
The findings could influence treatment protocols for tennis elbow and other tendon conditions, potentially offering patients more effective pain relief and functional recovery. This research contributes to the growing body of evidence supporting regenerative therapies that harness the body's natural healing mechanisms rather than simply managing symptoms.
Key Findings
- PRP injections were tested against placebo in 72 tennis elbow patients over 54 weeks
- Two injection protocol used leukocyte-poor versus leukocyte-rich PRP formulations
- Study measured pain reduction, grip strength, and tendon healing via MRI
- Trial completed after 7 years, providing long-term safety and efficacy data
Methodology
This was a randomized, double-blind, placebo-controlled trial enrolling 72 participants over 7 years (2017-2024). Participants received two injections one week apart and were followed for 54 weeks with comprehensive clinical and imaging assessments.
Study Limitations
The study enrolled only 72 of the planned 80 participants, potentially affecting statistical power. Results are specific to lateral epicondylitis and may not generalize to other tendon conditions or patient populations.
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