Effects of Hyaluronic Acid Injection and Exercise Treatments in Knee Osteoarthritis

"Hyaluronic acid was injected into the symptomatic knees of the patients a total of 3 times, once a week for 3 weeks.~Injections were administered by the physician using a lateral approach with the patient lying on his back and the knee in full extension.~After each injection, patients were warned to apply cold to avoid possible local reactions and not to overload for 24 hours.~Hyaluronic acid preparation was in the form of 2.5 ml solutions obtained biotechnologically, containing 10 mg sodium hyaluronan in each milliliter.~The hyaluronan in solution was of medium molecular weight (0.9 million daltons) but still lower molecular weight than the hyaluronan in normal healthy synovial fluid."