Platelet rich plasma (abbreviated PRP) is a new treatment used for some common orthopaedic conditions. PRP is a concentration of platelet cells taken from your blood, and these platelets have growth factors that may help in the healing process of chronic injuries. Growth factors are chemicals that signal the body to initiate a healing response. By injecting PRP into areas of an injury, the hope is to stimulate and optimize your body’s ability to heal the chronic conditions such as knee arthritis, rotator cuff injuries, and tennis elbow.