What is the primary cause of refeeding syndrome in TPN patients?
High fat content in the diet
Rapid reintroduction of carbohydrates
Excess protein intake
Vitamin deficiency
The Correct Answer is B
Rationale:
A. High fat content does not directly cause refeeding syndrome; fat is less likely to trigger the electrolyte shifts seen in this condition.
B. Rapid reintroduction of carbohydrates in malnourished patients stimulates insulin release, which drives phosphate, potassium, and magnesium into cells, leading to potentially life-threatening electrolyte imbalances—the hallmark of refeeding syndrome.
C. Excess protein intake can strain kidney function but is not the primary cause of refeeding syndrome.
D. Vitamin deficiencies, such as thiamine, can worsen complications, but the immediate trigger is the rapid carbohydrate load.
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 B
Explanation
Rationale:
A. RBC count is not typically affected by acute pancreatitis unless there is bleeding, which is uncommon.
B. Serum amylase is elevated in acute pancreatitis because pancreatic inflammation leads to the release of digestive enzymes into the bloodstream. Amylase levels usually rise within 6–12 hours of symptom onset and remain elevated for 3–5 days.
C. Calcium levels often decrease in acute pancreatitis due to fat saponification, not increase.
D. Magnesium levels are usually normal or decreased, but elevation is not a typical finding in pancreatitis.
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