Renal Nursing
Renal nursing covers disorders of the urinary system including acute kidney injury, chronic kidney disease, urinary tract infections, nephrolithiasis, and dialysis management. NCLEX questions test your understanding of renal function assessments, fluid and electrolyte management in kidney disease, dialysis nursing care, and patient education for renal conditions. The kidneys play a central role in fluid balance, electrolyte regulation, and blood pressure control.
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Study Tips
- ✓Know the AV fistula assessment using the thrill (palpable vibration) and bruit (audible whooshing) and remember: no blood pressures, no venipunctures, and no restrictive clothing on the fistula arm.
- ✓Memorize the key renal lab values: BUN (10-20 mg/dL), creatinine (0.6-1.2 mg/dL), and understand that rising creatinine is the most reliable indicator of worsening renal function.
- ✓Understand the dietary restrictions in chronic kidney disease: limit potassium, phosphorus, sodium, and protein (in pre-dialysis) while ensuring adequate calories.
- ✓Study the differences between hemodialysis and peritoneal dialysis including access sites, complications, and nursing assessments.
- ✓Learn the phases of acute kidney injury: oliguric (decreased urine output, fluid overload) and diuretic (excessive urine output, dehydration risk).
Common Mistakes to Avoid
A critical mistake is taking blood pressure or performing venipuncture on the arm with an AV fistula, which can cause clotting and loss of the access site. Students also confuse the oliguric and diuretic phases of acute kidney injury, which require opposite fluid management strategies. Another common error is not recognizing that chronic kidney disease patients are at high risk for hyperkalemia and should avoid potassium-rich foods like bananas, oranges, and potatoes. When a question involves dialysis, always assess the access site first and remember that hypotension is the most common complication of hemodialysis.
Renal Nursing FAQs
Common questions about renal nursing
For hemodialysis: assess the AV fistula or graft for thrill (palpable) and bruit (audible) every shift, never use the access arm for BP or blood draws, weigh the patient before and after treatment, monitor for hypotension during treatment, and assess for disequilibrium syndrome (headache, nausea, confusion). For peritoneal dialysis: use strict aseptic technique, warm the dialysate before instillation, monitor for cloudy effluent (sign of peritonitis), measure and record inflow and outflow volumes, and assess for respiratory distress during dwell time.
Prerenal AKI is caused by decreased blood flow to the kidneys (hypovolemia, heart failure, shock) with a BUN-to-creatinine ratio >20:1. Intrarenal AKI involves direct damage to kidney tissue from nephrotoxic drugs (aminoglycosides, contrast dye), prolonged ischemia, or glomerulonephritis. Postrenal AKI results from urinary tract obstruction (kidney stones, BPH, tumors) and is characterized by sudden anuria or oliguria that resolves when the obstruction is relieved. Treatment focuses on correcting the underlying cause while managing fluid and electrolyte imbalances.
Critical renal lab values include BUN (normal 10-20 mg/dL, elevated in renal failure), creatinine (normal 0.7-1.3 mg/dL, the most reliable indicator of kidney function), GFR (below 60 indicates CKD, below 15 indicates end-stage renal disease), potassium (3.5-5.0 mEq/L, hyperkalemia is the most life-threatening electrolyte imbalance in renal failure), phosphorus (elevated in renal failure because kidneys cannot excrete it), calcium (low because it has an inverse relationship with phosphorus), and hemoglobin (low because the kidneys produce less erythropoietin). Monitor potassium before and after dialysis and hold ACE inhibitors or potassium-sparing diuretics if potassium is elevated.