What is a major indication for initiation of total parenteral nutrition (TPN) in a neonate?

• A. When enteral feeding is contraindicated or insufficient; risks include infection, metabolic derangements, hyperglycemia, fatty liver disease; monitor labs.
• B. To replace maternal breast milk due to preference.
• C. As a routine first-line therapy for all neonates.
• D. Only to replace calories when there is NEC.

Answer: (A)

Total parenteral nutrition is started when the gut cannot provide enough nutrition through the usual feeding route. In neonates, that means when enteral feeding is contraindicated (for example, after major abdominal surgery, in NEC, or when the gut needs rest) or is insufficient to meet growth and energy needs. TPN delivers all calories and nutrients via a central venous line, supporting growth and organ function while the baby’s gut recovers or while a plan to achieve adequate enteral intake is developed. It isn’t used as a routine first-line therapy for all neonates or simply to replace breast milk by preference, and it isn’t limited to NEC management.

The major risks are infection from the central line and metabolic derangements such as electrolyte imbalances, hyperglycemia, and liver problems like fatty liver disease or cholestasis with prolonged use. Because of these risks, close monitoring is essential—glucose levels, electrolytes, liver enzymes, bilirubin, triglycerides, fluid balance, and catheter site health—to adjust the infusion and ensure safe, adequate nutrition until enteral feeding can adequately meet the baby's needs.