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Updated: Jun 26, 2026

Transdermal Measurement of Glomerular Filtration Rate in Mechanically Ventilated Piglets
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The association between renal function and structural parameters: a pig study.

Anders B Lødrup1, Kristian Karstoft, Thomas H Dissing

  • 1MR Research Center, Aarhus University, Aarhus, Denmark. loedrup.ab@gmail.com

BMC Nephrology
|December 25, 2008
PubMed
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Renal structural parameters correlate well with single kidney glomerular filtration rate (skGFR) in pigs. Cortical volume showed the strongest association, but precise prediction of skGFR from these parameters remains challenging.

Area of Science:

  • Nephrology
  • Renal Physiology
  • Stereology

Background:

  • Investigating the relationship between kidney structure and function is crucial for understanding renal health and disease.
  • Key structural parameters include renal cortical volume, total renal volume, number of glomeruli, and total glomerular volume.
  • Renal function is commonly assessed by glomerular filtration rate (GFR).

Purpose of the Study:

  • To explore the association between specific renal structural parameters and single kidney GFR (skGFR).
  • To identify which structural parameter best correlates with renal function.
  • To assess the feasibility of predicting skGFR using renal structural parameters.

Main Methods:

  • Studied 24 pigs, with 12 having healthy kidneys and 12 having diseased kidneys.

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  • Measured skGFR and subsequently estimated stereological parameters post-nephrectomy.
  • Utilized Pearson's correlation and linear regression analyses to evaluate associations and predictive capabilities.

    • Main Results:

    • A significant positive correlation was observed between all stereological parameters and skGFR (r > 0.60, p < 0.001).
    • Renal cortical volume exhibited the strongest correlation with skGFR (r = 0.78).
    • Predicting skGFR based on individual structural parameters proved to be imprecise.

    Conclusions:

    • Renal structural parameters demonstrate potential as surrogate markers for renal function.
    • Accurate prediction of single kidney GFR from a single structural parameter is currently difficult.
    • Further research may refine the use of structural parameters in assessing renal function.