Which electrolyte imbalance is most commonly associated with refeeding syndrome?
Hypermagnesemia
Hypercalcemia
Hypophosphatemia
Hyponatremia
The Correct Answer is C
Rationale:
A. Magnesium levels may actually drop, not rise, during refeeding syndrome due to intracellular shifts.
B. Calcium levels are typically not elevated as a direct result of refeeding syndrome.
C. Refeeding syndrome occurs when malnourished patients receive rapid carbohydrate reintroduction, triggering insulin release. This drives phosphate, potassium, and magnesium into cells, with phosphate depletion being the hallmark and most clinically significant electrolyte disturbance. Hypophosphatemia can cause muscle weakness, respiratory failure, and cardiac dysfunction.
D. Sodium levels may fluctuate, but hyponatremia is not the primary concern in refeeding syndrome.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Rationale:
A. The color change of stool is not the purpose of the laxative.
B. A laxative is necessary to help eliminate barium from the gastrointestinal tract, preventing constipation or impaction.
C. The laxative is not used to prevent magnesium absorption; this is unrelated to a barium study.
D. While facilities have protocols, the explanation should focus on patient safety and the purpose of the intervention, not just policy.
Correct Answer is A
Explanation
Rationale:
A. The pH of 7.3 indicates acidemia (normal range 7.35–7.45). The PaCO2 of 50 mm Hg is elevated (normal 35–45 mm Hg), indicating a respiratory cause. This combination is consistent with respiratory acidosis.
B. Respiratory alkalosis would present with a high pH and low PaCO2.
C. Metabolic acidosis would show a low pH and low HCO3-.
D. Metabolic alkalosis would show a high pH and elevated HCO3-.
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