Refeeding Syndrome — Management Pathway

Step-by-step decision

Choose step by step as prompted; reaching an endpoint gives the management recommendation. You can go back a step or restart anytime.

🎓 Want to practice? Do a case challenge with this pathway → (get a case, choose management step by step, scored).

Full pathway

1. [Decision] High-risk prevention or already occurring
   High-risk needing prevention, or already with electrolyte disturbance/organ dysfunction? (Restarting feeding after starvation/malnutrition; carbohydrate → insulin surge → intracellular shift of phosphate/potassium/magnesium, hypophosphatemia is the hallmark + low potassium + low magnesium, thiamine depletion → Wernicke, sodium-water retention → fluid overload (usually days 2–5). High-risk (NICE): BMI <16, very little intake for >5–10 days, marked weight loss, low baseline electrolytes. Complications: arrhythmia/sudden death, respiratory muscle weakness, heart failure, rhabdomyolysis.)
   • Already with low phosphate/potassium/magnesium or organ dysfunction → Already occurring → replace electrolytes + reduce feeding
   • High-risk, not yet fed → High-risk · prevention
2. [End] High-risk · prevention
   High-risk, not yet fed: check and correct baseline electrolytes (phosphate/potassium/magnesium) before feeding; give thiamine before/with feeding (≥100–300 mg/day, before glucose) + a multivitamin; start low and advance slowly — begin at about 10 kcal/kg/day (lower in the very high-risk) and increase gradually; monitor electrolytes daily for the first few days, restrict fluids/sodium to prevent overload.
3. [End] Already occurring → replace electrolytes + reduce feeding
   Already occurring (low phosphate/potassium/magnesium or organ dysfunction): aggressive IV replacement of phosphate/potassium/magnesium (monitor, repeat as needed); slow or pause feeding until electrolytes are corrected then advance gradually; continue high-dose thiamine; correct volume, cardiac monitoring (severe cases); manage arrhythmia/heart failure. Phosphate <0.5 mmol/L especially needs aggressive correction.

Source guidelines & references

• Refeeding syndrome (NICE guideline; ASPEN consensus; EMCrit)

This pathway is our own synthesis of the decision logic in the guidelines above (not the guideline verbatim); thresholds and workflows change as guidelines update — in practice follow the latest guideline, your institution's protocol and the individual patient.

Other pathways