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Related Experiment Videos

Xenon tissue/blood partition coefficient for pig urinary bladder.

K K Nielsen1, J Bülow, S L Nielsen

  • 1Department of Urology, Herlev Hospital, University of Copenhagen, Denmark.

Scandinavian Journal of Clinical and Laboratory Investigation
|June 1, 1990
PubMed
Summary

This study calculated the tissue/blood partition coefficient for xenon in pig urinary bladders. Researchers recommend using actual hematocrit and median tissue composition for accurate xenon washout studies of bladder blood flow.

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Area of Science:

  • Physiology
  • Biomedical Engineering
  • Radiology

Background:

  • Accurate measurement of organ blood flow is crucial in physiological and medical research.
  • Xenon washout studies are a common method for assessing tissue perfusion.
  • The tissue/blood partition coefficient (lambda) is a key parameter in xenon washout studies, influencing blood flow calculations.

Purpose of the Study:

  • To determine the tissue/blood partition coefficient (lambda) for xenon (Xe) in the urinary bladder of landrace pigs.
  • To investigate the influence of tissue composition and hematocrit on lambda values.
  • To provide recommendations for optimizing xenon washout studies of urinary bladder blood flow.

Main Methods:

  • Chemical analysis of urinary bladder tissue from four landrace pigs to determine lipid, water, and protein content.

Related Experiment Videos

  • Determination of hematocrit in the blood of the pigs.
  • Calculation of the tissue/blood partition coefficient (lambda) for xenon based on tissue composition and hematocrit.

    • Main Results:

    • The tissue/blood partition coefficient (lambda) for xenon varied between individual urinary bladders.
    • These variations were attributed to minor differences in hematocrit and tissue composition.
    • A median value for tissue composition and actual hematocrit were identified as important factors.

    Conclusions:

    • The variability in lambda underscores the need for individualized calculations in xenon washout studies.
    • Calculating lambda using the actual hematocrit and the median tissue composition derived from this study is recommended for urinary bladder blood flow assessments.
    • This approach enhances the accuracy of xenon washout studies for evaluating urinary bladder perfusion.