Which sign is used for lunate dislocation when making a fist?

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Study for the NATA BOC Domain 2 Clinical Evaluation and Diagnosis Test. Utilize our comprehensive flashcards and multiple-choice quiz features; each question comes with hints and thorough explanations. Prepare effectively for your certification exam!

Multiple Choice

Which sign is used for lunate dislocation when making a fist?

Explanation:
When a patient makes a clenched fist, the alignment of the metacarpal heads should show the knuckles dropping a bit, especially the middle finger. If the lunate has dislocated, the capitate and nearby bones shift so the third metacarpal doesn’t drop as it should—the middle finger’s knuckle stays level with the others. This lack of normal flexion of the middle finger on a fist is Murphy’s sign, and it points to lunate dislocation. Finkelstein’s test checks for De Quervain’s tenosynovitis, not lunate dislocation. Phalen’s test screens for carpal tunnel syndrome. Watson’s test assesses scapholunate instability, not lunate dislocation.

When a patient makes a clenched fist, the alignment of the metacarpal heads should show the knuckles dropping a bit, especially the middle finger. If the lunate has dislocated, the capitate and nearby bones shift so the third metacarpal doesn’t drop as it should—the middle finger’s knuckle stays level with the others. This lack of normal flexion of the middle finger on a fist is Murphy’s sign, and it points to lunate dislocation.

Finkelstein’s test checks for De Quervain’s tenosynovitis, not lunate dislocation. Phalen’s test screens for carpal tunnel syndrome. Watson’s test assesses scapholunate instability, not lunate dislocation.

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