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[Water-, electrolyte- and acid-base equilibrium in the aged]
Zeitschrift Fur Gerontologie
|September 1, 1981
Summary
Kidney function declines with age, affecting filtration, urine concentration, and electrolyte balance. This age-related decline can lead to quicker decompensation of renal disorders.
Area of Science:
- Nephrology
- Gerontology
- Physiology
Background:
- Kidney function naturally diminishes with aging.
- Age-related changes impact glomerular filtration rate (GFR) and tubular function.
- Hormonal changes, including decreased plasma-renin activity, aldosterone, and vasopressin, occur in older adults.
Purpose of the Study:
- To summarize the age-related changes in kidney function.
- To highlight the impact of these changes on water, electrolyte, and acid-base balance.
- To discuss the implications for renal failure and decompensation in the elderly.
Main Methods:
- Review of physiological changes associated with aging kidneys.
- Analysis of functional capacities including urine dilution/concentration and electrolyte excretion.
- Examination of hormonal responses (renin-aldosterone-vasopressin) to stimulation.
Main Results:
- Reduced glomerular filtration rate (GFR) in aging individuals.
- Impaired tubular function affecting urine concentration and electrolyte handling.
- Diminished hormonal responses, including plasma-renin activity, aldosterone, and vasopressin secretion.
- Increased susceptibility to water, electrolyte, and acid-base imbalances.
- Limited renal reserve leading to quicker decompensation of renal disorders.
Conclusions:
- Aging significantly impairs kidney functional capacity.
- These functional and hormonal changes predispose older adults to renal failure.
- Early recognition of age-related renal changes is crucial for managing health in the elderly.