Refeeding syndrome is characterized by a rapid fall in which electrolytes?

Refeeding syndrome is characterized by a rapid fall in which electrolytes?

• A. Sodium, potassium, phosphorus.
• B. Phosphorus, potassium, magnesium.
• C. Potassium, magnesium, sodium.
• D. Sodium, phosphorus, magnesium.

Answer: (B)

Refeeding syndrome occurs when nutrition is restarted after a period of starvation, triggering a surge of insulin that drives glucose and electrolytes back into cells. Phosphate is mined for ATP production, so serum phosphate drops quickly as it’s pulled into cells to fuel cellular energy. Potassium and magnesium also shift into cells and can be lost in urine as metabolism ramps up, causing rapid decreases in their blood levels. This trio—low phosphate, low potassium, and low magnesium—best characterizes the syndrome and explains many of the complications that can arise, such as weakness, breathing problems, and cardiac or hematologic issues. Sodium levels don’t typically fall as a defining feature, so the rapid fall in phosphorus, potassium, and magnesium is the most diagnostic pattern.

Refeeding syndrome occurs when nutrition is restarted after a period of starvation, triggering a surge of insulin that drives glucose and electrolytes back into cells. Phosphate is mined for ATP production, so serum phosphate drops quickly as it’s pulled into cells to fuel cellular energy. Potassium and magnesium also shift into cells and can be lost in urine as metabolism ramps up, causing rapid decreases in their blood levels. This trio—low phosphate, low potassium, and low magnesium—best characterizes the syndrome and explains many of the complications that can arise, such as weakness, breathing problems, and cardiac or hematologic issues. Sodium levels don’t typically fall as a defining feature, so the rapid fall in phosphorus, potassium, and magnesium is the most diagnostic pattern.