Nerve compression syndrome in the thoracic outlet

INTRODUCTION: The nerve conduction studies, F-waves and dermatosomal and lor somatosensory evoked potential have a low level of sensitivity for Thoracic Outlet Compression Syndrome (TOCS) diagnosis. A standard negative electrodiagnostic study does not exclude the presence of TOCS. OBJECTIVE: The purpose of this neurophysiological note is that the Wright's hyperabduction, costoclavicular compression and Adson's scalenus tests important in making a clinical diagnosis of TOCS can be used as neurophysiological provocative maneuvers to determine the effect of braquial position on electrodiagnostic parameters. MATERIAL AND METHODS: Nine selected TOCS patients were evaluated previous and following provocative maneuvers for 3 and 6 minutes. RESULTS: The results showed a positive electrodiagnostic study in 7/9 patients. CONCLUSIONS: It is suggested that patients with presumptive TOCS and negative electrodiagnostic findings be reevaluated immediately after 6 minutes of Wright's, Adson's or costoclavicular compression provocative tests.