A patient on total parenteral nutrition requires monitoring. Which condition should be prioritized in surveillance?

• A. Hyperglycemia alone
• B. Fluid overload
• C. Blood pressure stability
• D. Hyperglycemia and electrolyte imbalance

Answer: (D)

Total parenteral nutrition delivers a concentrated glucose solution and electrolytes directly into the bloodstream, so the most important surveillance is metabolic stability, specifically watching for hyperglycemia and electrolyte imbalances. The glucose load from TPN can raise blood sugar quickly, leading to osmotic diuresis, dehydration, infection risk, and shifts in electrolytes. At the same time, the electrolyte content of TPN can cause disturbances such as low phosphate, potassium, or magnesium, which can trigger weakness, respiratory issues, arrhythmias, or neurologic problems. Because both glucose control and electrolyte balance can have rapid, serious consequences, monitoring for both hyperglycemia and electrolyte disturbances is prioritized. While fluid status and blood pressure are important, they are often influenced by multiple factors, and the immediate threats from TPN are metabolic instability due to glucose and electrolyte changes.