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Related Experiment Videos

Spironolactones and glomerular filtration.

V Martínek, J Jirka, J Stríbrná

    International Journal of Clinical Pharmacology, Therapy, and Toxicology
    |June 1, 1983
    PubMed
    Summary
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    Spironolactone administration may falsely decrease kidney function markers in transplant patients. This study suggests the observed decrease in chromogen clearance is an artifact, not a true decline in glomerular filtration rate.

    Area of Science:

    • Nephrology
    • Pharmacology
    • Transplantation Medicine

    Background:

    • Hyperaldosteronism is a concern in renal transplant recipients.
    • Spironolactone is used for pharmacologic screening of hyperaldosteronism.
    • Accurate assessment of glomerular filtration rate (GFR) is crucial post-transplantation.

    Purpose of the Study:

    • To evaluate the effect of intravenous spironolactone on GFR in renal transplant patients.
    • To investigate potential artifacts in GFR measurement following spironolactone administration.

    Main Methods:

    • Intravenous spironolactone (mean dose 1.2 g over 3 days) administered to 12 renal transplant subjects.
    • Glomerular filtration rate assessed using chromogen clearance.
    • Simultaneous measurement of creatinine, plasma urea, and urea excretion fraction.

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    Main Results:

    • A decrease in chromogen clearance was observed after spironolactone administration.
    • No significant changes were noted in creatinine levels or urea parameters.
    • The decrease in chromogen clearance was attributed to an increase in plasma chromogen levels.

    Conclusions:

    • The observed decrease in chromogen clearance following spironolactone is likely an artifact.
    • Spironolactone metabolites may interfere with the alkaline picrate method used for chromogen determination.
    • Clinicians should consider this potential artifact when interpreting GFR in patients receiving spironolactone.