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Functional cervical myelography with iohexol.

P Nakstad, O Aaserud, T Ganes

    Neuroradiology
    |January 1, 1985
    PubMed
    Summary
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    Functional cervical myelography in flexion improved diagnostic imaging by widening the subarachnoid space. This technique, using iohexol contrast, showed similar side effect rates to conventional methods, with specific post-exam positioning aiding safety.

    Area of Science:

    • Radiology
    • Neurology
    • Medical Imaging

    Background:

    • Cervical myelography is crucial for diagnosing spinal cord conditions.
    • Conventional techniques may have limitations in visualizing the subarachnoid space and spinal cord dynamics.
    • Functional imaging offers potential for enhanced diagnostic accuracy.

    Purpose of the Study:

    • To evaluate the diagnostic utility of functional cervical myelography.
    • To assess the impact of neck flexion and extension on subarachnoid space and spinal cord visualization.
    • To determine the safety and side effect profile of iohexol during functional myelography.

    Main Methods:

    • Thirty patients underwent functional cervical myelography with lateral view radiographs in neck flexion and extension.

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  • Sagittal tomography was performed in both positions.
  • Iohexol contrast medium was used, and patient positioning post-examination was standardized.

    • Main Results:

    • Neck flexion demonstrated widening of the subarachnoid space and decreased sagittal diameter of the spinal cord due to shortening.
    • In cases of spinal narrowing or block, flexion improved caudal contrast passage and diagnostic imaging.
    • Iohexol use showed side effect frequencies similar to conventional myelography; 7% experienced EEG changes.

    Conclusions:

    • Functional cervical myelography, particularly in flexion, enhances visualization of the subarachnoid space and spinal cord.
    • This technique offers improved diagnostic capabilities for cervical spinal conditions.
    • Standardized post-examination positioning appears to mitigate contrast-related side effects.