During joint aspiration, fluid is withdrawn from a swollen joint with a needle and syringe, possibly under local anaesthesia. The fluid is then examined to find the cause of the swelling. Joint aspiration may also be carried out to relieve swelling due to excess fluid and to diagnose or treat disorders such as gout, pseudogout, and rheumatoid arthritis.
From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.
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