A nurse is caring for a client who is receiving total parenteral nutrition and develops refeeding syndrome. The nurse should expect which of the following laboratory findings?

Choice A reason: Hypophosphatemia is a hallmark of refeeding syndrome. When nutrition is reintroduced after a period of starvation, insulin secretion increases, driving phosphate into cells and depleting serum levels. This can lead to respiratory failure, cardiac dysfunction, and neurological symptoms. Choice B reason: Hyponatremia may occur in various conditions but is not a defining feature of refeeding syndrome. Electrolyte shifts in refeeding syndrome primarily affect phosphate, potassium, and magnesium. Choice C reason: Hyperkalemia is not typical of refeeding syndrome. Instead, hypokalemia is more common due to intracellular shifts triggered by insulin. Choice D reason: Hypermagnesemia is rare in refeeding syndrome. Hypomagnesemia is more likely due to cellular uptake and inadequate stores during malnutrition.