Patient Positioning
Patient seated in front of the examiner, hand palm down resting on the examination table.
Probe Positioning
Place the transducer on a sagittal plane over the dorsal aspect of the wrist. Move the probe radially or ulnarly over the extensor tendon compartment of interest.


Note: The carpal boss is a bony protuberance at the base of the second or third metacarpals on the dorsal surface. In this case with irritation of the nearby extensor tendons.