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KMID : 0378019810240050067
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New Medical Journal
1981 Volume.24 No. 5 p.67 ~ p.71
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A Study of Electromyography in Diagnosis of Herniated Lumbar Disc
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Abstract
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Besides clinical findings and myelography, electromyography is a method that can be used to diagnose herniated lumbar disc, and its diagnostic accuracy is almost same as the myelography. As compared with the myelogram which reflects a distortion of a column of dye in the subarachnoid space and represents structure, the electromyography indicates altered physiology of muscle cell membrane and reflects function of motor unit, and these two methods are complemented each other rather than merely duplicating.
70 electromyogrphys on patients with suspected herniated lumbar disc from January 1980 to December 1980 were reviewed and the results were
1. Of the 70 cases, male was 39 cases and female was 31 cases, and the average age was 35.1
2. Among 12 cases which have no clinical findings, 5 cases showed abnormal electromyography findings, and 2 cases among 58 cases which were suspected to have herniated lumbar disc clinically showed normal electromyograpy.
3. Positive sharp wave was the most frequent electromyographic change, 76.8%, and the frequency of fibrillation potential, increased insertional activity, and polyphasic potential was same, 42.9%
4. The diagnostic accuracy was calculated in 15 patients to whom laminectomy was performed and the clinical diagnostic accuracy was 86.7%, myelographic diagnostic accuracy was 90% and electromyograhic diagnostic accuracy was 86.7%.
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KEYWORD
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