The Thumb Abduction Stress Test is a wrist examination procedure that determines hyperabduction or hyperextension injury conditions known as a Game Keeper’s Thumb or Skier’s Thumb. This test may also be used to identify severe sprain or joint instability.
The patient should be awake and cooperative during a Thumb Abduction Stress Test.
- Patient should be seated when performing this test.
- The examiner grips the thumb of the afflicted hand while stabilizing the metacarpal phalangeal joint.
- The thumb is abducted and the patient is assessed for pain, excessive motion or empty end feel.
Positive Thumb Abduction Stress Test
There is positive Thumb Abduction Stress Test when the patient exhibits the following signs:
- There is pain over the ulnar collateral ligament of the thumb. This could indicate a sprain due to hyperabduction or hyperextension injury.
- Patient describes an empty feel and/or excessive motion of the digit. This could indicate severe sprain, joint instability or Stenner lesion.
The name Jersey Finger was derived from the injury that a player suffers after attempting to grab another player’s jersey. Positive Sweater Sign should be followed by diagnostic imaging to rule out an avulsion fracure.