If conjugated bilirubin is elevated in a patient on a 12-hour cycle of 3-in-1 HPN, which action is most appropriate?

• A. Remove all trace elements from HPN
• B. Increase lipid calories to prevent essential fatty acid deficiency
• C. Evaluation for possible overfeeding of dextrose and/or intravenous fat emulsion
• D. Addition of carnitine and choline to the HPN

Answer: (C)

When conjugated bilirubin is elevated in a patient on a 12-hour cycle of 3-in-1 PN, the liver is showing cholestasis related to PN. The most likely cause in this setting is overfeeding from the PN, especially excess dextrose calories or an excessive lipid emulsion. This PN-associated cholestasis tends to improve if the total energy delivered is reduced to match the patient’s actual needs and the lipid dose is titrated appropriately.

So the best next step is to evaluate the prescription for possible overfeeding of dextrose and/or intravenous fat emulsion: review the daily carbohydrate and fat amounts, assess whether the energy provided exceeds the patient’s requirements, and adjust the PN accordingly (e.g., lowering dextrose rate or lipid dose, or modifying the cycle). Monitoring liver enzymes and bilirubin over time helps confirm improvement after adjustments.

Removing all trace elements isn’t appropriate because they’re essential. Increasing lipid calories would likely worsen the cholestasis, not help it. Adding carnitine and choline can be considered in specific contexts, but they don’t address the immediate issue of PN-associated cholestasis due to overfeeding.