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Fluid therapy for acute and chronic renal failure
1Department of Medicine, Tufts University School of Veterinary Medicine, North Grafton, Massachusetts.
Summary
Animals with renal failure experience predictable metabolic issues, including fluid and electrolyte imbalances. Veterinary fluid therapy, guided by careful monitoring, is crucial for managing these complex cases.
Area of Science:
- Veterinary Medicine
- Nephrology
- Internal Medicine
Background:
- Animals with renal failure commonly present with metabolic abnormalities.
- These can include negative water balance, electrolyte disturbances (sodium, potassium), and acid-base imbalances.
- Calcium and phosphorus levels are also frequently altered in renal failure.
Purpose of the Study:
- To outline the predictable metabolic abnormalities in animals with renal failure.
- To emphasize the importance of fluid therapy in managing these patients.
- To guide the selection of fluids and electrolytes based on patient-specific abnormalities.
Main Methods:
- Review of common metabolic derangements in acute renal failure (ARF) and chronic renal failure (CRF).
- Analysis of fluid balance, sodium, potassium, acid-base status, calcium, and phosphorus abnormalities.
- Principles of fluid therapy tailored to renal failure patients.
Main Results:
- Oliguric ARF is associated with sodium retention and potassium retention.
- Polyuric ARF involves increased urinary sodium loss and potassium wasting.
- CRF typically shows normal potassium balance but slower sodium regulation; both ARF and CRF cause metabolic acidosis.
- Hypocalcemia and hyperphosphatemia are common findings.
Conclusions:
- Fluid therapy is essential for animals with renal failure, usually requiring intravenous administration.
- Treatment must be individualized based on specific metabolic and laboratory abnormalities.
- Close patient monitoring and periodic laboratory assessment are critical for successful management.