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Polyuric prerenal failure

P D Miller, R A Krebs, B J Neal

    Archives of Internal Medicine
    |July 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Non-oliguria in acute renal failure may indicate polyuric prerenal failure, not always acute tubular necrosis (ATN). This condition, marked by blunted urinary concentrating ability, is often reversible with prompt treatment.

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    Area of Science:

    • Nephrology
    • Internal Medicine
    • Critical Care

    Background:

    • Prerenal failure typically presents with oliguria, reflecting renal salt and water retention.
    • Non-oliguria in acute renal failure often suggests acute tubular necrosis (ATN) due to impaired renal function.

    Purpose of the Study:

    • To investigate cases of non-oliguric acute renal failure in patients with impaired systemic hemodynamics.
    • To identify the underlying cause of renal failure in non-oliguric patients without clear evidence of ATN.

    Main Methods:

    • Retrospective case series analysis.
    • Evaluation of nine patients with acute renal failure and impaired systemic hemodynamics who were non-oliguric.
    • Assessment of urinary concentrating ability.

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    Main Results:

    • Nine patients presented with non-oliguric acute renal failure despite hemodynamic compromise.
    • The common finding was a blunted urinary concentrating ability, termed 'polyuric prerenal failure'.
    • These cases did not show strong evidence for ATN.

    Conclusions:

    • Non-oliguria in acute renal failure with hemodynamic impairment does not always signify ATN.
    • 'Polyuric prerenal failure' is a distinct entity characterized by impaired urinary concentration.
    • Prompt recognition and treatment of this reversible condition are crucial.