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Related Experiment Videos

Nerve root cut-off on metrizamide-enhanced computerized tomography.

G R Smith

    Southern Medical Journal
    |May 1, 1986
    PubMed
    Summary
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    The "wink" sign on CT scans accurately identifies lumbar nerve compression from herniated discs. This sign is a valuable tool for diagnosing sciatica, even when myelograms are inconclusive.

    Area of Science:

    • Radiology
    • Neurology
    • Orthopedic Surgery

    Background:

    • Lumbar disc herniation is a common cause of sciatica.
    • Accurate diagnosis is crucial for effective treatment.
    • Metrizamide-enhanced computed tomography (CT) is an imaging modality used to visualize the spinal canal.

    Observation:

    • The "wink" sign, a specific finding on metrizamide-enhanced CT scans, indicates nerve root compression.
    • This sign was observed in patients with lumbar nerve compression due to herniated discs.

    Findings:

    • The "wink" sign demonstrated a strong correlation with lumbar nerve compression caused by herniated discs.
    • Seven out of 46 patients showed a definite "wink" sign on CT, despite normal or equivocal myelograms.
    • These seven patients were confirmed to have herniated lumbar discs during surgery or via positive diskography.

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    Implications:

    • The "wink" sign provides an objective diagnostic finding for sciatica.
    • It can improve diagnostic accuracy in cases where traditional myelography is inconclusive.
    • This sign aids clinicians in assessing and managing patients with sciatica effectively.