Hyperkalemia: Diagnostic algorithm

Decreased renal potassium excretion

 • Acute renal failure

 • Chronic renal failure

 • Drugs

Increased potassium load

 • Supplementation (oral/iv)

 • Potassium-rich diet

 • Blood transfusion

 • Tumor lysis/hemolysis

Hyporeninemic, hypoaldosteronism in:

 • Interstitial nephritis

 • Obstructive uropathies

 • Drugs

 • Diabetic Nephropathy

Renin Normal, Renin High:

 • Primary hypoaldosteronism

 • Congenital adrenal hyperplasia

 • Drugs

 • Addison's/congenital adrenal hypoplasia

Aldosterone high:

 • Post-renal transplant

 • Obstructive uropathy

 • Sickle-cell nephropathy

 • Drugs

 • PHA type l/type 2

 • Type 1



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