Final answer:
TPN (total parenteral nutrition solution) must be sterile to prevent infections.
Step-by-step explanation:
TPN (total parenteral nutrition solution) must be sterile to prevent infections. When a solution is administered directly into the bloodstream, any contamination could introduce harmful pathogens into the body, leading to serious infections. By ensuring that TPN is sterile, healthcare providers can minimize the risk of infection and promote the overall safety and well-being of the patient.