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Acute renal failure and hypercalcemia.

Miguel Moysés-Neto1, Fabiana M Guimarães, Fátima H Ayoub

  • 1Division of Nephrology, Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil. mmoyses@convex.com.br

Renal Failure
|March 17, 2006
PubMed
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Hypercalcemia, a condition of high blood calcium, is often linked to underlying diseases when it causes acute renal failure (ARF). Treating hypercalcemia improved kidney function in all studied patients.

Area of Science:

  • Nephrology
  • Endocrinology
  • Internal Medicine

Background:

  • Hypercalcemia can stem from increased bone resorption, renal calcium retention, or gut absorption.
  • It may precipitate acute renal failure (ARF), hypertension, or worsen existing tubular necrosis.
  • The interplay between ARF and hypercalcemia necessitates understanding its underlying causes and impact on renal function.

Purpose of the Study:

  • To investigate the association between acute renal failure and hypercalcemia.
  • To identify comorbidities linked to hypercalcemia in patients with ARF.
  • To evaluate the impact of treating hypercalcemia on renal function in ARF patients.

Main Methods:

  • Retrospective study of eight patients with ARF and hypercalcemia.
  • Analysis of patient charts for comorbidities, serum creatinine, total serum calcium, and ionized serum calcium levels.

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  • Data presented as median and percentile (25th; 75th) before and after treatment.

    • Main Results:

    • All eight patients had ARF associated with hypercalcemia and presented with comorbidities (e.g., cancer, multiple myeloma, hyperparathyroidism).
    • Serum creatinine levels decreased significantly post-treatment (median 1.1 mg/dL) compared to pre-treatment (median 3.3 mg/dL).
    • Serum calcium levels also decreased post-treatment (total median 9.1 mg/dL, ionized median 1.1 mmol/L) with simultaneous improvement in renal function.

    Conclusions:

    • Hypercalcemia in ARF patients typically indicates an underlying comorbidity.
    • Treatment of hypercalcemia, often with hydration and diuretics, led to improved renal function in all cases.
    • Nonoliguric renal failure was the pattern observed in all patients studied.