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Accelerating gallstone dissolution.

J C Tao, E L Cussler, D F Evans

    Proceedings of the National Academy of Sciences of the United States of America
    |October 1, 1974
    PubMed
    Summary
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    Cholesterol gallstone dissolution rates depend on bile flow. Slow flow is diffusion-limited, while rapid flow is controlled by interfacial kinetics, suggesting faster dissolution in high-flow bile.

    Area of Science:

    • Biochemistry
    • Physiology
    • Chemical Engineering

    Background:

    • Cholesterol gallstones are a common condition.
    • Nonsurgical dissolution therapy for gallstones is desirable.
    • Bile flow dynamics influence cholesterol dissolution.

    Purpose of the Study:

    • To investigate the factors controlling cholesterol dissolution rates in model bile salt solutions.
    • To determine the impact of bile flow rate on dissolution kinetics.
    • To assess the potential for accelerating gallstone dissolution therapy.

    Main Methods:

    • Utilized model bile salt solutions to simulate bile.
    • Measured cholesterol dissolution rates under varying flow conditions.
    • Analyzed the relationship between flow rate and dissolution using mass transfer and kinetic principles.

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    Main Results:

    • Dissolution rates are governed by diffusion at low bile flow rates.
    • At high bile flow rates, dissolution is independent of flow and likely limited by interfacial kinetics (micelle adsorption).
    • Dissolution varies with the square root of flow at low rates but plateaus at high rates.

    Conclusions:

    • Cholesterol gallstone dissolution therapy effectiveness is influenced by bile flow.
    • Therapeutic acceleration is limited in slow-flowing bile.
    • Significant acceleration of gallstone dissolution is possible in rapidly flowing bile.