High-Yield GI Topics for the NCLEX

GI questions on the NCLEX cover a broad range of conditions. Upper GI: GERD (lifestyle modifications, PPIs, elevated HOB), peptic ulcer disease (H. pylori treatment, gastric vs. duodenal ulcer pain patterns), and upper GI bleeding (assess hemodynamic stability, NG tube lavage, prepare for endoscopy). Lower GI: inflammatory bowel disease (Crohn's — skip lesions, terminal ileum, fistulas; UC — continuous, starts at rectum, bloody diarrhea), diverticulitis (LLQ pain, low-fiber during acute, high-fiber for prevention), and bowel obstruction (NG decompression, NPO, monitor for perforation). Liver: cirrhosis complications (ascites, varices, hepatic encephalopathy — lactulose, protein restriction), hepatitis types and transmission routes.

Renal System and Fluid-Electrolyte Balance

Renal nursing questions frequently test fluid and electrolyte knowledge. Acute kidney injury (AKI): prerenal (decreased perfusion), intrarenal (direct damage), postrenal (obstruction) — monitor urine output, BUN/creatinine, electrolytes. Chronic kidney disease (CKD): stages by GFR, dietary restrictions (low protein, low potassium, low phosphorus, low sodium), erythropoietin for anemia, phosphate binders with meals. Dialysis: hemodialysis (AV fistula care — feel for thrill, listen for bruit, no BP/venipuncture on that arm) vs. peritoneal dialysis (monitor for peritonitis — cloudy effluent). Fluid/electrolyte: hyperkalemia (peaked T waves, cardiac risk — calcium gluconate, insulin with dextrose, kayexalate), hyponatremia (confusion, seizures — fluid restriction in dilutional), hypocalcemia (Chvostek's, Trousseau's signs).

Surgical GI/Renal Nursing and Post-Op Care

Surgical questions are common: cholecystectomy (post-op: low-fat diet, monitor for bile leak), appendectomy (pre-op: do NOT apply heat to abdomen, NPO), colostomy care (stoma should be pink/moist, measure for proper appliance fit, ascending = liquid stool, descending = formed stool), ileostomy (high-output, risk of dehydration and electrolyte imbalance), and nephrectomy (monitor remaining kidney function, assess for hemorrhage). For kidney transplant: immunosuppression medications, monitor for rejection (fever, decreased urine output, tenderness over graft, elevated creatinine), and infection prevention.

Fluid and Electrolyte Imbalances: A Complete Review

The NCLEX heavily tests electrolyte imbalances. Potassium (K+): normal 3.5-5.0 mEq/L — hypokalemia (muscle weakness, U waves on ECG, digoxin toxicity risk) vs. hyperkalemia (peaked T waves, widened QRS, cardiac arrest risk). Sodium (Na+): normal 135-145 mEq/L — hyponatremia (confusion, seizures) vs. hypernatremia (thirst, dry mucous membranes). Calcium (Ca++): normal 8.5-10.5 mg/dL — hypocalcemia (tetany, Chvostek's, Trousseau's) vs. hypercalcemia (muscle weakness, kidney stones, 'bones, stones, groans, and moans'). Magnesium (Mg++): normal 1.5-2.5 mEq/L — hypomagnesemia (similar to hypocalcemia, increases digoxin toxicity). Master IV fluid types: isotonic (NS, LR), hypotonic (0.45% NS), hypertonic (3% NS, D5NS).