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. High-fiber foods are beneficial for bowel regularity and should not be decreased.
B. Excessive or chronic use of stimulant laxatives like bisacodyl can lead to electrolyte imbalances, dehydration, and dependence.
C. While rectal irritation is possible, electrolyte imbalance is the more significant risk.
D. Irregular bowel movements are common and not necessarily indicative of poor intestinal health.
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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