Arthroscopic knee lavage or debridement was no better than placebo surgery in a randomized controlled trial described in the July 11 issue of the New England Journal of Medicine.
“The fact that the effectiveness of arthroscopic lavage or debridement in patients with osteoarthritis of the knee is no greater than that of placebo surgery makes us question whether the dollars spent on these procedures might not be put to better use,” senior author Nelda P. Wray, MD, MPH, from Baylor College of Medicine in Houston, Texas, says in a news release. In this study, 180 patients with knee pain received arthroscopic debridement, arthroscopic lavage, or simulated arthroscopic surgery in which the surgeon made small incisions without inserting instruments or removing cartilage.
All patients randomized to one of these three groups signed an informed consent and were treated by the same surgeon. Of 324 subjects meeting inclusion criteria, 44% declined to participate, suggesting that the consent procedure effectively explained that subjects might receive only a sham operation. Throughout the study, subjects were blinded to the type of procedure they received.
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