CAMRT Radiography Practice Exam

Which wrist-positioning maneuver opens the carpal interspaces on the lateral side of the wrist?

1. Radial deviation

2. Ulnar deviation

3. Supination

4. Pronation

The correct answer is: Ulnar deviation

The maneuver that effectively opens the carpal interspaces on the lateral side of the wrist is ulnar deviation. When the wrist is positioned in ulnar deviation, the carpal bones on the lateral side are separated, which enhances visibility of the individual carpal structures and their relationships within that region. This is particularly useful during radiological evaluations to assess for fractures or other abnormalities in the carpal bones. In contrast, radial deviation would compress these structures together rather than separate them. Supination and pronation refer to the rotation of the forearm and do not significantly influence the carpal interspaces in the same way as ulnar deviation does. Therefore, the movement of ulnar deviation is critical for providing a clearer view of the carpal anatomy on the lateral side of the wrist.