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Platelet-Rich Plasma Helps Tennis Elbow

Study: PRP Beats Cortisone Shots for Tennis Elbow
WebMD Health News
Reviewed by Laura J. Martin, MD

March 10, 2010 – Platelet-rich plasma (PRP) -- the latest, still-controversial treatment for tendon injuries -- heals tennis elbow better than corticosteroid shots, a new study suggests.

Because they get very little blood, injured tendons heal notoriously slowly. Blood platelets attract healing growth factors, so the idea of PRP is to inject a patient's own platelets at the site of a tendon injury.

To date, small studies suggest that PRP works for tennis elbow. However, a recent study in patients with Achilles tendon injuries yielded disappointing results.

At the same time, corticosteroid shots have been losing favor. They are great at relieving acute pain in the short term, but they don't promote healing and may lead to further tendon breakdown.

So what are tennis elbow sufferers supposed to do for their aching arms? A strong hint comes from Taco Gosens, MD, PhD, and colleagues at St. Elisabeth Hospital in Tilburg, Netherlands.

The researchers randomly assigned patients with chronic lateral epicondylitis -- tennis elbow lasting longer than six months and pain ranking at least 5 on a 10-point scale -- to get either a PRP or corticosteroid injection.

Both injections were given directly into the area of maximum tenderness and also into the tendon using a "peppering" technique in which the needle, after being passed through the skin, is inserted several times into the tendon.

What happened? Patients who got the corticosteroid had much faster pain relief. But 26 weeks after treatment, patients in the PRP arm were much more likely to have less pain and more function than those who received the corticosteroid.

And they kept getting better over the next year. By this time, PRP-treated patients reported a 64% improvement in pain and an 84% improvement in disability. Corticosteroid-treated patients reported a 24% improvement in pain and a 17% improvement in disability.

Moreover, only three of the 51 patients in the PRP group went on to get tennis-elbow surgery, and only two went back for a corticosteroid shot. Among the 49 patients in the corticosteroid group, six went on to surgery, six went back for PRP treatment, and one returned for another corticosteroid shot.

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