Which laboratory parameter is NOT listed as requiring monitoring during initiation or as needed for tube feeding, with checks every 6 months for stable, long-term feeds?

• A. Electrolytes
• B. BUN
• C. Vitamin D
• D. Transferrin

Answer: (C)

In tube feeding management, the labs you monitor routinely are those that can change quickly with feeding, hydration, kidney function, and protein intake. Electrolytes are watched closely to catch shifts that can affect fluid and acid-base balance, especially during initiation or refeeding. BUN reflects nitrogen balance and renal function, so it helps gauge protein adequacy and clearance. Transferrin serves as a protein-status marker and iron transport indicator, giving a sense of nutrition adequacy in the context of protein intake. Vitamin D status, while important for bone health, does not typically change rapidly with tube feeding and is not part of the standard monitoring every six months for stable long-term feeds. Check vitamin D levels only if there are specific risk factors or signs of deficiency, and adjust supplementation based on broader clinical assessment rather than routine six-month intervals.