Thoracic Outlet
THORACIC OUTLET
The thoracic outlet syndrome [TOS] is a condition caused by compression of the nerves or the vein and artery that emerge from the chest at the root of the neck. The space there is quite small, changes in position can cause symptoms of pain and irritation. An ultrasound technique, photoplethysmography, is used to assess the flow to the upper extremities.
To prepare you will be asked to remove clothing that covers your arm and will be given a gown to wear. During the exam, you will be asked to move your arms in various positions.
The acquired images (sonograms) are interpreted by a registered diagnostic medical sonographer then sent to a board-certified radiologist for creation of a diagnostic ultrasound report detailing your results and diagnosis.





