Which of the following is NOT one of the seven components for how PN ingredients should be ordered?

• A. Dose for each macronutrient and electrolyte
• B. Complete salt form for electrolytes
• C. Dose for vitamins
• D. Infusion rate

Answer: (D)

PN ingredient ordering focuses on what will be in the parenteral nutrition solution and in what amounts, including the types of nutrients and their forms. You need the dose for each macronutrient and electrolyte so the bag provides the correct energy and electrolyte balance, the complete salt form for electrolytes to avoid ambiguity about the salt used, and the doses for essential vitamins (and similarly for trace elements) to ensure micronutrient adequacy. The infusion rate, while crucial for delivering the PN safely and achieving the patient’s daily intake, is an administration parameter rather than part of the ingredient specification. It governs how fast the solution is delivered, not what the solution contains. So the item that does not belong to the ingredient-order components is the infusion rate.