Myelography and Myography in Diagnosis of Herniated Intervertebral Disk

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Abstract
Both electromyography and melography have been widely used by surgeons to confirm the clinical diagnosis prior to excision of herniated intervertebral disk. Electromyography has been used more often in recent years, mostly because opinions have differed as to complications following the use of iophendylate (Pantopaque) myelography, although few surgeons prefer to depend on their clinical diagnosis alone. The diagnostic accuracy of myelography, electromyography, and clinical findings in 40 patients on whom the presence of herniated intervertebral disk was proved surgically is discussed. Electromyography had great value in determining the absence or presence of root compressions, but not much value in specifying the exact level of compression. Myelography gave a higher percentage of correct reports. When electromyography and myelography or clinical diagnosis are combined, the diagnostic value of the procedures increases.

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