INJECTIONS of a patient’s blood can be effective for knee osteoarthritis. Research based on 215 patients shows that symptoms almost halved after injections of platelet-rich plasma (produced by spinning blood in order to get a greater concentration of platelets, blood cells that produce growth factors – proteins linked to healing), reports the Journal of Orthopaedic Surgery. The idea is that growth factors stimulate the growth of new cartilage. The aim is to relieve symptoms, potentially delaying the need for joint replacement surgery.
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