Used to determine is the state of the subclavian artery

Steps:

1. Patient is standing or seated
2. Patient is instructed to abduct the shoulders to 90 degrees, externally rotate, and flex the elbows
3. Instruct the patient to flex and extend their fingers for up to 3 minutes
4. Physician watch for discoloration or dropping of the extremity

The test is considered to be positive if discoloration occurs or there is dropping of the extremities.

Positive test indicates there is compression often subclavian artery (Arterial component of Thoracic Outlet Syndrome)