Chronic renal failure can result from diabetes, hypertension, glomerulonephritis, or other causes leading to irreversible kidney damage and decreased glomerular filtration rate. Key nursing priorities include monitoring for excess fluid retention and electrolyte imbalances, ensuring adequate nutrition given potential nausea or appetite changes, and supporting patient mobility despite possible fatigue. Outcome goals are normal fluid balance, adequate nutritional intake without signs of malnutrition, and activity levels within the patient's capabilities.