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Related Experiment Videos

Intracranial vasospasm: a study with iron compounds.

J L Fox

    Surgical Neurology
    |May 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Ferrous ions (Fe++) caused vasodilation, while ferric ions (Fe+++) caused vasoconstriction in canine basilar arteries. This suggests iron

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    Area of Science:

    • Neuroscience
    • Vascular Biology
    • Pharmacology

    Background:

    • Subarachnoid hemorrhage can lead to cerebral vasospasm.
    • Hemoglobin degradation products are implicated in vasospasm.
    • The role of iron in this process requires further investigation.

    Purpose of the Study:

    • To investigate the effects of hemoglobin and its derivatives on canine basilar arteries.
    • To determine the specific role of iron ions (ferrous and ferric) in regulating vascular tone.

    Main Methods:

    • Canine basilar arteries were exposed and induced into spasm.
    • Topical application of hemoglobin, methemoglobin, hemin, ferrous chloride (FeCl2), and ferric chloride (FeCl3) was performed.
    • Effects on arterial diameter were observed using an operating microscope.

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    Main Results:

    • Hemoglobin, methemoglobin, and hemin did not produce consistent changes in arterial diameter.
    • Ferrous ions (Fe++) induced significant vasodilation at 10 microgram/ml.
    • Ferric ions (Fe+++) caused mild vasoconstriction at similar concentrations.

    Conclusions:

    • Iron ions play a critical role in modulating basilar artery tone.
    • Ferrous ions may have a protective role against vasospasm.
    • Ferric ions might contribute to vasospasm following subarachnoid hemorrhage.