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Related Experiment Videos

Correlation of fluid exchange in the microcirculation and macrocirculation.

J N Diana, B P Fleming, L E Bairnsfather

    International Journal of Microcirculation, Clinical and Experimental
    |January 1, 1982
    PubMed
    Summary

    Understanding capillary wall hydraulic conductivity (Lp) is key for fluid homeostasis. This study highlights discrepancies between single capillary and whole organ measurements, suggesting dynamic permeability processes.

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    Area of Science:

    • Physiology
    • Biophysics

    Background:

    • Accurate hydraulic conductivity (Lp) of capillary walls is crucial for understanding fluid homeostasis.
    • Disruptions in fluid balance can lead to tissue damage and organismal death.

    Purpose of the Study:

    • To summarize recent findings on Lp measurements in single capillary and whole organ experiments.
    • To investigate discrepancies between these measurement methods and propose explanations.

    Main Methods:

    • Review of recent experimental data on Lp measurements.
    • Comparison of quantitative information obtained from single capillary versus whole organ studies.

    Main Results:

    • Single capillary and whole organ experimental methods yield dissimilar quantitative data for Lp.

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  • Potential reasons for these discrepancies are discussed, pointing to dynamic permeability processes.

    • Conclusions:

    • Capillary membrane permeability is hypothesized to be dynamic, influenced by organ metabolic needs and organismal homeostasis.
    • Tissue fluid balance is proposed to be a passive process governed by Starling forces, facilitating nutrient diffusion.