Abstract
THE reactivity of both perfused and isolated segments of human, umbilical vessels to various pharmacological agents has already been reported1–5. Without exception, serotonin (5-hydroxytryptamine) has been found to be a potent constricting agent of both umbilical artery and vein. In porfusion studies, however, arteries and vein were generally not perfused simultaneously or, in cases where they were, drugs were administered only to the arterial perfusing fluid.
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WINTERS, R., DYER, D. Unique Vascular Relationship in the Human Umbilical Cord. Nature 226, 656 (1970). https://doi.org/10.1038/226656a0
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DOI: https://doi.org/10.1038/226656a0
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