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How to assess glomerular function and damage in humans.

K H Rahn1, S Heidenreich, D Brückner

  • 1Department of Medicine D, University of Münster, Germany.

Journal of Hypertension
|April 1, 1999
PubMed
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Assessing renal function involves measuring glomerular filtration rate (GFR) using filtration markers like inulin or iohexol. Creatinine is less ideal due to tubular secretion, and radioisotopic markers can overestimate GFR.

Area of Science:

  • Nephrology
  • Pharmacokinetics
  • Biomarker Analysis

Background:

  • Accurate assessment of renal function is crucial for managing kidney diseases.
  • Glomerular filtration rate (GFR) is a key indicator of kidney health.
  • Current methods for GFR estimation have limitations.

Purpose of the Study:

  • To review methods for assessing renal function in human subjects.
  • To compare the accuracy of different filtration markers for GFR estimation.
  • To discuss the role of proteinuria in evaluating kidney damage.

Main Methods:

  • Review of established and novel techniques for GFR measurement, including inulin clearance, creatinine levels, radioisotopic markers, and iohexol clearance.
  • Pharmacokinetic calculations for determining total body clearance.

Related Experiment Videos

  • Analysis of proteinuria using reagent test strips and quantitative marker proteins.

    • Main Results:

    • Inulin clearance is an exact GFR measure but requires timed urine collection.
    • Creatinine clearance is affected by tubular secretion and muscle mass variations.
    • Radioisotopic markers and some other methods can overestimate GFR, especially at lower levels.
    • Iohexol clearance shows good agreement with inulin clearance.
    • Albuminuria is a significant indicator of diabetic nephropathy and hypertensive end-organ damage.

    Conclusions:

    • Accurate GFR measurement is essential for clinical practice and research.
    • Iohexol offers a promising alternative for GFR estimation with good correlation to inulin clearance.
    • Proteinuria assessment, particularly albuminuria, is vital for monitoring kidney disease progression and therapeutic response.