A severely malnourished client is started on TPN. Forty-eigh… | MyMerci
Medical Emergencies PA
Question

A severely malnourished client is started on TPN. Forty-eight hours later, the client develops dyspnea, confusion, weakness, and labs show low phosphate, magnesium, and potassium. Which is the priority interpretation and action?

Explanation
Correct (2): Refeeding syndrome — when carbohydrates are introduced after starvation, insulin surge drives phosphate, magnesium, potassium intracellularly → severe deficiencies with arrhythmia, respiratory failure, seizures, heart failure. Prevention: start TPN at 25-50% of goal, advance slowly over 4-7 days, give thiamine 100 mg before/during initial feeding, replete phosphate/Mg/K before progressing. (1,3,4) Dangerous.

In-depth explanation

Memory Tip Refeeding = "Phosphate-Magnesium-Potassium DROP + Thiamine BEFORE carbs." Identify high risk: BMI 15%, no intake >10 days, low pre-feeding electrolytes.

Clinical scenario

Scenario 65-year-old female with severe protein-calorie malnutrition started on TPN. 48 hr later: dyspnea, confusion, weakness, phosphate 1.2, Mg 1.3, K 3.0.

Key concepts

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