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Somatosensory evoked potentials: Lack of value for diagnosis of thoracic outlet syndrome
Author(s) -
Veilleux Martin,
Stevens J. Clarke,
Campbell J. Keith
Publication year - 1988
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.880110608
Subject(s) - somatosensory evoked potential , medicine , ulnar nerve , median nerve , carpal tunnel syndrome , thoracic outlet syndrome , compound muscle action potential , surgery , nerve conduction study , nerve conduction , physical examination , anatomy , anesthesia , electrophysiology , elbow
Abstract Twenty patients with thoracic outlet syndrome (TOS) seen at the Mayo Clinic between October 1984 and November 1985 were studied prospectively with routine nerve conduction studies, concentric needle examination, and bilateral median and ulnar somatosensory evoked potentials (SEPs). Results of nerve conduction studies and needle examination were abnormal in 30% of the patients, one patient having a reduced ulnar sensory nerve action potential amplitude and five others having neurogenic motor unit potential changes in the hand muscles. Ulnar SEPs were abnormal in three patients (15%), and median SEPs were abnormal in one patient, who also had abnormalities in ulnar SEPs. In patients with TOS, routine nerve conduction studies and needle examination were the most helpful electrophysiologic studies in excluding more common conditions. The routine use of ulnar SEPs in the evaluation of patients with TOS is probably not worth‐while.