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Related Experiment Videos

Transcapillary fluid dynamics during the menstrual cycle.

P Oian, A Tollan, H O Fadnes

    American Journal of Obstetrics and Gynecology
    |April 1, 1987
    PubMed
    Summary

    During the luteal phase, women experience reduced plasma and interstitial colloid osmotic pressure, potentially linked to water retention and a decrease in total protein mass, despite no changes in hydrostatic pressure.

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    Area of Science:

    • Physiology
    • Gynecology

    Background:

    • Transcapillary fluid dynamics play a crucial role in maintaining fluid balance within the body.
    • Understanding these dynamics during different phases of the menstrual cycle is important for women's health.

    Purpose of the Study:

    • To investigate changes in transcapillary fluid dynamics, specifically interstitial colloid osmotic pressure and interstitial hydrostatic pressure, between the follicular and luteal phases in women.
    • To explore potential factors contributing to observed fluid shifts during the menstrual cycle.

    Main Methods:

    • Interstitial colloid osmotic pressure measured using the "wick" method.
    • Interstitial hydrostatic pressure measured using the "wick-in-needle" method in subcutaneous tissue (thorax and ankle).
    • Measurements taken in women without premenstrual syndrome symptoms during follicular and luteal phases.

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    Main Results:

    • A significant reduction in plasma and interstitial colloid osmotic pressures was observed from the follicular to the luteal phase.
    • Interstitial hydrostatic pressures remained unchanged between phases.
    • A slight but significant weight gain (mean 0.7 kg) was noted in the luteal phase, with no significant changes in serum albumin, hemoglobin, or hematocrit.

    Conclusions:

    • Reduced colloid osmotic pressures in the luteal phase may indicate water retention.
    • Simple dilution does not fully explain the observed decreases in colloid osmotic pressure.
    • A reduction in total protein mass during the luteal phase is suggested as a contributing factor.