Watson test
Clinical examination maneuver to detect scapholunate ligament injury by reproducing scaphoid subluxation.
Full Definition
The Watson test, also known as the scaphoid shift test, is a provocative clinical examination technique used to detect scapholunate ligament injury and instability. The test is performed by placing the examiner's thumb over the scaphoid tubercle on the volar aspect of the wrist while moving the patient's wrist from ulnar deviation to radial deviation. In a positive test, the scaphoid subluxates dorsally with reproduction of pain and often an audible or palpable clunk when pressure is released. The test was described by Kirk Watson and is considered one of the most reliable clinical tests for detecting scapholunate pathology. A positive test suggests injury to the scapholunate ligament, though false positives can occur in patients with generalized ligamentous laxity.
Usage
Usage note: Named test should be capitalized; distinguish from other scaphoid-related examination techniques.
In Context
- "A positive Watson test with painful dorsal subluxation of the scaphoid suggested scapholunate ligament injury." — Physical examination note
- "The Watson test was performed bilaterally with a positive finding only on the injured left wrist." — Clinical assessment