An injury treatment popular with professional athletes failed in a study published this week in the Journal of the American Medical Association.
The treatment is called platelet-rich plasma injection. The doctor takes some of the patient’s blood and uses a relatively simple technique to separate out the platelets, some of which are then re-injected at the injury site. The idea is that the platelets stimulate the repair of injured tissue.
In the new study, 54 patients with injured Achilles tendons were randomly assigned to undergo PRP or receive a placebo shot of saline. Both groups also did standard rehabilitation. There was no statistically significant difference between the two groups, which were compared six weeks, 12 weeks and 24 weeks after undergoing the procedure.
PRP got a big publicity boost about a year ago, when Hines Ward and Troy Polamalu of the Pittsburgh Steelers used platelet-rich plasma therapy while they were on the way to winning the Super Bowl; a story on the procedure landed on the front page of the New York Times last February. Another famous patient: Tiger Woods, who reportedly had the procedure in his knee several times last year.
Earlier studies (such as this one, of patients with tennis elbow) had shown promise, but those studies typically included few or no patients who were randomly assigned to receive a placebo.
Though the procedure remains unproven, it may yet bear out for some injuries. Lots of other studies of PRP are underway, for problems such as injured knees and damaged rotator cuffs.
The JAMA study was funded by Biomet, a medical device company, and conducted by doctors in the Netherlands.
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