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Plasma aldosterone concentrations in chronic renal disease
Kidney International
|January 1, 1982
Summary
In chronic renal disease, aldosterone levels are often elevated when kidney function is significantly reduced, even with normal potassium and plasma renin activity levels. This suggests aldosterone plays a role in maintaining potassium balance in these patients.
Area of Science:
- Nephrology
- Endocrinology
- Potassium Homeostasis
Background:
- Discrepancies exist regarding aldosterone's role in potassium balance during chronic kidney disease.
- Plasma renin activity (PRA) variations may explain these literature disagreements.
Purpose of the Study:
- To investigate the relationship between aldosterone levels and renal insufficiency.
- To clarify aldosterone's role in potassium homeostasis in patients with chronic renal disease and normal PRA.
Main Methods:
- Studied 28 patients with varying degrees of renal insufficiency.
- Monitored serum potassium and plasma renin activity (PRA) concentrations.
- Measured plasma aldosterone levels in relation to creatinine clearance.
Main Results:
- In patients with normal serum potassium and PRA, plasma aldosterone was elevated when creatinine clearance fell below 50% of normal.
- This elevation occurred despite comparable potassium and PRA levels across patients.
Conclusions:
- Aldosterone levels tend to be elevated in chronic renal disease patients with impaired kidney function (creatinine clearance < 50%).
- This finding supports a role for aldosterone in maintaining potassium homeostasis even when PRA is normal.