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Related Experiment Videos

[Changes in CBF pattern after bypass surgery studied by CT with Xe enhancement].

A Tamura, H Segawa, T Nakagomi

    No to Shinkei = Brain and Nerve
    |October 1, 1983
    PubMed
    Summary

    This study measured cerebral blood flow (CBF) using serial CT scans before and after microsurgical anastomosis in focal cerebral ischemia patients. Post-surgery, CBF improved, showing hyperemia in some cases, but remained low in severe stroke areas.

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    Area of Science:

    • Neurology
    • Radiology
    • Neurosurgery

    Context:

    • Focal cerebral ischemia significantly impacts cerebral blood flow (CBF).
    • Microsurgical anastomosis is a potential treatment for improving blood supply in ischemic regions.
    • Assessing CBF changes pre- and post-intervention is crucial for evaluating treatment efficacy.

    Purpose:

    • To evaluate the effectiveness of microsurgical anastomosis in restoring cerebral blood flow (CBF) in patients with focal cerebral ischemia.
    • To utilize a novel method involving serial CT scanning with non-radioactive xenon enhancement for precise CBF measurement.
    • To analyze CBF changes in both hemispheres and specific ischemic areas following surgical intervention.

    Summary:

    • Cerebral blood flow (CBF) was measured using serial CT scans with non-radioactive xenon enhancement in five patients undergoing microsurgical anastomosis for focal cerebral ischemia.

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  • Pre-operative CBF was reduced bilaterally, particularly in severe stroke cases (over 75% reduction).
  • Post-anastomosis, CBF increased in both hemispheres. Reversible ischemic attack cases showed hyperemia, while severe stroke areas had limited recovery but surrounding areas exhibited hyperemia.

    • Impact:

    • Demonstrates the utility of serial CT scanning with xenon enhancement for monitoring CBF changes in focal cerebral ischemia.
    • Provides evidence for the beneficial effects of microsurgical anastomosis on CBF, with varying degrees of recovery depending on stroke severity.
    • Highlights the potential for hyperemia in ischemic areas post-intervention, suggesting improved vascular function.