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Physiology of the splanchnic circulation.

D A Parks, E D Jacobson

    Archives of Internal Medicine
    |July 1, 1985
    PubMed
    Summary

    The splanchnic circulation, vital for organs like the stomach and intestines, involves complex blood flow regulation. Multiple intrinsic and extrinsic factors ensure stable blood supply to these organs.

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    Area of Science:

    • Physiology
    • Cardiovascular System
    • Gastrointestinal Physiology

    Background:

    • The splanchnic circulation supplies blood to the digestive organs and spleen.
    • It comprises parallel gastric, intestinal, colonic, pancreatic, hepatic, and splenic circulations.
    • Intramural circulation within organs adds complexity to blood flow dynamics.

    Purpose of the Study:

    • To review the structure and regulation of the splanchnic circulation.
    • To highlight the importance of intramural blood flow redistribution.
    • To discuss the various factors influencing splanchnic hemodynamics.

    Main Methods:

    • Literature review of splanchnic circulation physiology.
    • Analysis of anatomical arrangements of splanchnic arteries.
    • Synthesis of information on extrinsic and intrinsic regulatory mechanisms.

    Main Results:

    • The splanchnic circulation involves extensive arterial anastomoses and potential intramural circuits.
    • Blood flow redistribution within intramural circuits is significant.
    • Numerous extrinsic (e.g., autonomic nervous system) and intrinsic (e.g., local metabolites) factors regulate splanchnic perfusion.

    Conclusions:

    • The splanchnic circulation is a complex system with parallel vascular arrangements.
    • Redistribution of blood flow within organs is a key regulatory feature.
    • Overlapping regulatory mechanisms prevent drastic changes in splanchnic tissue perfusion, ensuring organ function.

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