What condition is an indication for PN in fistula management?

What condition is an indication for PN in fistula management?

• A. High output fistula (> 500 mL/day)
• B. Low output fistula (< 100 mL/day)
• C. Fistula without any drainage
• D. Any fistula regardless of output

Answer: (A)

High-output fistulas cause substantial losses of fluids, electrolytes, and nutrients, which quickly lead to malnutrition and impair healing. When drainage exceeds about 500 mL per day, enteral nutrition alone often cannot meet energy and protein needs. Parenteral nutrition provides the necessary calories and amino acids to compensate for these losses, support nitrogen balance, and promote healing while the fistula is managed. Low-output fistulas typically can be supported with enteral feeding and do not automatically require PN. A fistula without drainage would not cause nutritional losses through the fistula, so PN isn’t indicated on that basis. Applying PN to every fistula regardless of output isn’t appropriate; PN is targeted to cases with significant losses or insufficient enteral intake.

High-output fistulas cause substantial losses of fluids, electrolytes, and nutrients, which quickly lead to malnutrition and impair healing. When drainage exceeds about 500 mL per day, enteral nutrition alone often cannot meet energy and protein needs. Parenteral nutrition provides the necessary calories and amino acids to compensate for these losses, support nitrogen balance, and promote healing while the fistula is managed.

Low-output fistulas typically can be supported with enteral feeding and do not automatically require PN. A fistula without drainage would not cause nutritional losses through the fistula, so PN isn’t indicated on that basis. Applying PN to every fistula regardless of output isn’t appropriate; PN is targeted to cases with significant losses or insufficient enteral intake.