The wrist is placed in a neutral position with the radial side up. The examiner grasps the base of the thumb just beyond the anatomical snuff box. The synovial lining and the base of the metacarpal are squeezed together using the thumb and finger. The compression can be enhanced by circumducting the thumb while continually holding pressure.
Courtesy of Bruce C Anderson, MD.
Graphic 65989 Version 2.0
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