he Doctor will not usually order imaging or blood tests unless he/she wishes to rule out other conditions, such as another type of arthritis, or perhaps a fractured bone. Tests may include:
- X-rays – images may show that the cartilage is breaking down, if a narrowing space within a joint is detected. Bone spurs around a joint may also be revealed. It is not uncommon for people with no osteoarthritis symptoms to have X-ray signs of the condition.
- MRI (magnetic resonance imaging) scan – this device uses a magnetic field and radio waves to create detailed images of the inside of the body, including bone and bone cartilage. An MRI scan can help the doctor determine what is causing pain.
- Blood tests – these are usually performed in order to rule out other conditions, especially rheumatoid arthritis.
- Joint fluid analysis (arthrocentesis) – a sterile needle is used to withdraw (aspirate) fluid from an inflamed joint and then sent to the lab. If uric acid crystals are present it is more likely the patient has gout. This test can also determine whether there is inflammation or an infection.