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contentuptodate· Content· item f8_18_8480

©2013 UpToDate ® Print Email Prepatellar bursal aspiration The patient is placed in a supine position. Ethyl chloride is sprayed on the skin. A 1 1/2 inch, 16-gauge needle is inserted at the base of the bursa; the needle is passed into the center of the sac to a depth of 1/4 to 3/8 inch and fluid is aspirated. Courtesy of Bruce C Anderson, MD.