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[Renal acidosis].

M Paillard1, P Houillier, P Borensztein

  • 1Service d'explorations fonctionnelles, université Pierre et Marie-Curie, INSERM, hôpital Broussais, Paris.

La Revue Du Praticien
|October 1, 1990
PubMed
Summary
This summary is machine-generated.

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Diagnosing metabolic acidosis involves analyzing urinary pH and ammonium (NH4) excretion. The urinary anion gap helps differentiate causes, guiding treatment for renal acidosis and tubular acidoses.

Area of Science:

  • Nephrology
  • Acid-Base Balance
  • Renal Physiology

Context:

  • Metabolic acidosis diagnosis relies on urinary parameters.
  • Distinguishing extra-renal from renal acidosis is crucial.
  • Urinary pH and ammonium (NH4) excretion are key indicators.

Purpose:

  • To outline diagnostic criteria for metabolic acidosis.
  • To differentiate between various causes of renal acidosis.
  • To guide clinical assessment using urinary markers.

Summary:

  • Urinary pH > 5.5 suggests renal acidosis, while pH < 5.5 suggests extra-renal origin, though exceptions exist.
  • Urinary NH4 excretion > 70 mmol/24h indicates extra-renal acidosis; < 40-50 mmol/24h suggests renal acidosis.
  • The urinary anion gap (Na + K - Cl) differentiates these conditions: negative in extra-renal, positive in renal acidosis.

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Impact:

  • Facilitates accurate diagnosis of metabolic acidosis subtypes.
  • Informs targeted therapeutic strategies for kidney disorders.
  • Enhances understanding of renal tubular function in acidosis.