Answer
Before the procedure is begun, the joint landmarks should be carefully palpated, and the needle insertion point should be marked with ink or indented into the skin with the tip of a retracted pen.
The area should be prepared with povidone-iodine solution and then allowed to dry. The iodine can then be wiped away from the needle insertion site with an alcohol pad to prevent irritation. In patients allergic to iodine, chlorhexidine is an acceptable alternative. Once the procedure is completed, excess iodine should be removed from the skin.
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Media Gallery
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Medial approach to aspiration of ankle joint.
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Medial approach to aspiration of knee joint.
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Anterior approach to aspiration of glenohumoral joint. Point where coracoid can be palpated is marked with "C."
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Approach to aspiration of the wrist joint.
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Approach to aspiration of elbow joint, with landmarks labeled. LE = lateral epicondyle; R = radial head; O = olecranon.
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Medial approach to aspiration of metacarpophalangeal joint.
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