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The splanchnic circulation: intrinsic regulation

D N Granger, P R Kvietys

    Annual Review of Physiology
    |January 1, 1981
    PubMed
    Summary
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    Splanchnic blood flow is intrinsically regulated by myogenic, metabolic, and hormonal factors. Their importance shifts based on tissue status, ensuring proper function during stress and activity.

    Area of Science:

    • Physiology
    • Gastrointestinal Physiology
    • Vascular Biology

    Background:

    • Splanchnic blood flow is crucial for nutrient absorption and waste removal.
    • Intrinsic regulatory mechanisms are essential for maintaining splanchnic circulation homeostasis.
    • Understanding these mechanisms is key to addressing various physiological and pathological conditions.

    Purpose of the Study:

    • To elucidate the primary intrinsic mechanisms regulating splanchnic blood flow.
    • To differentiate the roles of myogenic, metabolic, and hormonal factors under varying physiological conditions.
    • To understand how these regulatory factors adapt to tissue status and functional demands.

    Main Methods:

    • Review and synthesis of existing literature on splanchnic blood flow regulation.

    Related Experiment Videos

  • Analysis of the interplay between myogenic, metabolic, and hormonal control systems.
  • Examination of physiological conditions including stress states and enhanced functional activity.

    • Main Results:

    • Myogenic, metabolic, and hormonal factors are key intrinsic regulators of splanchnic blood flow.
    • Myogenic and metabolic mechanisms dominate during stress (e.g., reduced arterial pressure, elevated venous pressure), controlling microvascular pressure and oxygen exchange.
    • Hormonal and metabolic mechanisms cooperate during heightened functional activity to optimize nutrient/oxygen delivery and waste removal.

    Conclusions:

    • The regulation of splanchnic blood flow is multifactorial, with a dynamic balance between myogenic, metabolic, and hormonal influences.
    • These mechanisms adapt their relative importance based on physiological demands, ensuring tissue viability and function.
    • Further research into these integrated regulatory systems can inform therapeutic strategies for splanchnic circulatory disorders.