Use the scenario to guide your answer Exhibits What is the primary reason for electrolyte loss in a patient with an NG tube to suction?

Rationale: A. Increased urine output: Mr. Allen's urine output is actually low (600 mL/24 hrs), and his urine is dark and concentrated, suggesting dehydration, not excessive urinary losses. B. Loss of gastric secretions: Continuous suction via the nasogastric (NG) tube removes gastric fluids, which are rich in potassium, chloride, hydrogen ions, and magnesium. This is the main reason for his observed hypokalemia (K = 2.9), hypochloremia (Cl = 94), and low magnesium (Mg = 1.2). C. Decreased oral intake: While Mr. Allen is NPO, reduced intake alone is not sufficient to cause such significant electrolyte imbalances in a short period. The active loss of electrolytes through NG suction is the primary contributor. D. Fever is not mentioned in the scenario. Fever can lead to insensible fluid losses, but this is not relevant here and not the primary mechanism of electrolyte depletion.