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1Principles

Early diagnosis of injuries without dislocation is important. This is not always easy due to the swelling and often ...

Undislocated lesions: Early diagnosis by Stark maneuver

Early diagnosis of injuries without dislocation is important. This is not always easy due to the swelling and often inconclusive x-rays.

Keep the PIP joint hyperextended. Passively flex the DIP joint.
If passive movement of the DIP joint is limited, this is a strong indication for the presence of a central slip detachment.
Compare with the uninjured hand.