末梢神経病変の局在診断法 術前，術中のＩＮＣＨＩＮＧ法の有用性について

Abstract

With serial stimulation of the ulnar nerve at the elbow the compound action potential and sensory nerve action potential were recorded using “inching techique” in 10 normal subjects and 15 patients with the cubital tunnel syndrome.The motor axons and sensory axons normally showed a predictable latency change of 0.13 to 0.24ms/cm and 0.14 to 0.21ms/cm as the stimulus site was moved proximally in 1cm increments.Preoperatively in 13 of the 15 patients abnormal conduction was sharply localized from 1cm proximal to the medial epicondyle to 3cm distal. Then intraoperative inching technique performed in 9 patients. The findings were as follows.1) Conduction abnormalities corresponded to the compressive lesions and localized.2) Preoperative conduction abnormalities corresponded to intraoperative ones.