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Computed tomography in degenerative spinal stenosis

P C McAfee, C G Ullrich, H A Yuan

    Clinical Orthopaedics and Related Research
    |November 1, 1981
    PubMed
    Summary
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    Computed tomography (CT) effectively identifies residual spinal stenosis after surgery, correlating with poor outcomes. Advanced CT imaging improves surgical success rates for degenerative lumbar spinal stenosis.

    Area of Science:

    • Radiology
    • Neurosurgery
    • Orthopedic Surgery

    Background:

    • Degenerative lumbar spinal stenosis (DLSS) is a common condition.
    • Surgical outcomes for DLSS can be variable.
    • Accurate preoperative and postoperative assessment is crucial.

    Purpose of the Study:

    • To evaluate the diagnostic value of computed tomography (CT) in assessing degenerative lumbar spinal stenosis.
    • To correlate postoperative CT findings with surgical outcomes.
    • To compare CT with other radiographic modalities.

    Main Methods:

    • Retrospective comparison of preoperative and postoperative CT scans with other imaging.
    • Analysis of 20 patients (10 excellent, 10 poor surgical results).
    • Multiplanar reconstructions and sagittal views utilized.

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    Main Results:

    • Moderate to severe residual stenosis on postoperative CT correlated with surgical failure.
    • Inadequate unroofing of lateral gutters was a common cause of failure.
    • CT detected stenosis in central canal, lateral recesses, and neuroforaminal regions, surpassing myelography.

    Conclusions:

    • Postoperative CT is valuable for identifying residual stenosis and predicting surgical failure.
    • CT provides superior definition of stenosis sites compared to myelography.
    • Improved CT imaging may enhance surgical success rates for DLSS.