According to the ASPEN PN safety rules, which item on the inpatient PN label is NOT mandatory?

• A. Infusion rate expressed in mL/hour
• B. Beyond-use date and time
• C. Size of in-line filter
• D. Electrolyte content expressed in individual ions

Answer: (D)

When labeling inpatient parenteral nutrition, the information included must directly support safe preparation, storage, and administration. The infusion rate in mL/hour is essential because it tells the care team exactly how fast to deliver the solution, and nurses rely on this to program pumps correctly to avoid under- or over-infusion. The beyond-use date and time is also mandatory because PN admixtures have limited stability after preparation; knowing the exact time helps prevent giving a solution that may have degraded or become unsafe. The size of the in-line filter is another required item because proper filtration ensures particulates are removed and that the solution remains compatible with the IV line and administration system; using the correct filter size helps prevent occlusion and compatibility problems.

Electrolyte content expressed in individual ions, while important for monitoring patient status, is not required to be printed on the label in terms of ions. The label should convey electrolyte information in a form that supports clinical monitoring, but listing each electrolyte strictly as individual ions on the label is not mandated.