What tests do physicians use to diagnose thoracic outlet syndrome?
The diagnosis of thoracic outlet syndrome is suggested by the symptoms and supported by findings of the doctor during the examination. Certain maneuvers of the arm and neck can produce symptoms and blood vessel "pinching," causing a loss of pulse. This includes the Adson's maneuver, whereby the examiner moves the shoulder joint into positions that can cause pinching of both the nerves and artery to the tested arm. Further supportive testing can include electrical tests, such as electromyogram (EMG) and somatosensory evoked responses (although these may not be positive in all patients). Some patients can have angiogram X-ray tests that demonstrate the pinched area of the blood vessel involved.