Thoracic Outlet Syndrome
Strain gauge, pneumo, photo plethysmography or Continuous wave Doppler is used to evaluate arm ischemia related to the thoracic outlet syndrome. Most symptoms are due to compression of the lower roots of the brachial plexus, although vascular complications can occur in the presence of a cervical rib. The test for thoracic outlet syndrome involves monitoring blood flow in the lower arm or hand while performing maneuvers designed to produce the symptoms. Since the disease is often bilateral, both limbs should be tested.