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Platelet-rich plasma treatment shows potential for knee osteoarthritis
Date:2/13/2013

aseline and then one year after the PRP injection, physicians also evaluated the knee cartilage with magnetic resonance imaging (MRI), something that has not previously been done by researchers in other PRP studies. The radiologists reading the MRIs did not know whether the examination was performed before or after the PRP treatment.

"The problem with a lot of the PRP studies is that most people have just used subjective outcome instruments, such as pain and function scores," said Hollis Potter, M.D., chief of the Division of Magnetic Resonance Imaging at Hospital for Special Surgery, another author of the study. "But even when patients are blinded, they know there has been some treatment, so there is often some bias interjected into those types of studies. When you add MRI assessment, it shows you the status of the disease at that time, regardless of whether the patient is symptomatic or asymptomatic or they have good or poor function in the knee. You find out what the cartilage actually looks like. We can noninvasively assess the matrix or the building blocks of cartilage."

While previous studies have shown that patients with osteoarthritis can lose roughly five percent of knee cartilage per year, the HSS investigators found that a large majority of patients in their study had no further cartilage loss. "The knee can be divided into three compartments, the medial compartment, the lateral compartment and the patellofemoral compartment," said Dr. Halpern. "If we look at these compartments individually, which we did, in at least 73% of these cases, there was no progression of arthritis per compartment at one year. That is very significant, because longitudinal studies suggest a four to six percent progression of arthritis at one year."

Treatment with PRP was also useful in improving pain, stiffness and function. The investigators found that pain, measured by a standard test called the Western Ontario and McMaster Universities Arthritis Ind
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Contact: Phyllis Fisher
phyllis.fisher@gmail.com
212-606-1724
Hospital for Special Surgery
Source:Eurekalert

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