AC Joint Distraction Test

Other Names

• AC Joint Distraction Test
• Bad Cop Test
• Acromioclavicular joint distraction test

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Purpose

• Evaluate the proximal biceps brachii and acromioclavicular joint as a cause of the patients shoulder pain

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Description

First Description

• Place the arm in maximal internal rotation
• Apply slight pressure upward
• Positive test
  • Pain at the top of the shoulder

Second Description

• Apply downward pressure over the lateral one-third of the clavicle
• Passively adduction, external rotation, and forced forward flexion of the humerus
• Positive test
  • Reproduction of pain at the AC joint

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Pathology

• Proximal Biceps Tendon Injuries
• Subacromial Impingement Syndrome

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Evidence

• Unknown

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See Also

• Physical Exam Shoulder
• Shoulder Pain Main
• Shoulder Anatomy Main

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