Diagnosis and tests of Osteoarthritis
Clinical history and physical examination. The physical examination is used to detect the presence of any pain on moving the joint and, occasionally the degree of swelling and joint effusion. In advanced stages, the joint is deformed and makes creaking noises (crepitation) when it moves.
Laboratory data. Osteoarthritis does produce significant changes in the blood analyses. However, they can occasionally be useful to exclude other rheumatic diseases. The joint fluid has mainly mechanical characteristics, that is to say, almost clear and does not contain cells.
Radiography. The use of x-rays is essential to confirm the diagnosis. The radiological signs of osteoarthritis are very characteristic: growth of the bone that protrudes from the joint (osteophytes); reduction in the joint space and an increase in density (sclerosis) of the adjacent bone.
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