肘部管症候群における尺骨神経の肉眼所見と電気生理学的検査所見の関連についての検討

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  • Study of Relation between Observation Results of Ulnar Nerve and Results of Electrophysiological Examinations

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Cubital tunnel syndrome (CuTS) is caused by various etiologies,so the surgical method to be applied must be selected carefully. We performed electrophysiological examination on 24 cases with CuTS prior to surgery. We marked five points along the ulnar nerve at intervals of 2cm, and the center point positioned at the medial epicondyle. We defined the intervals as zones 1 to 4 from the distal side. We stimulated each point and measured the latency between the points. In one group showing a delayed zone between the distal and medial, most of the patients had compression or pseudoneuroma of the ulnar nerve. In another group with a delayed zone between the proximal and medial epicondyle,or in most of the zones (2 to 4), dislocation of the ulnar nerve was seen. It is thought that the main cause of the delayed zone in the latter group is friction neuritis. Anterior translocation of the ulnar nerve was performed on this group and outcome was good. Electrophysiological examination on may be helpful for selecting the surgical method for cubital tunnel syndrome.

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