The nurse is aware that a total nutritional admixture (TNA) is different from parenteral nutrition (PN) in that:
A) There is an increased risk for catheter infections in patients who received TNA compared to patients who received PN.
B) TNA can be administered over 8 hours. and PN requires around-the-clock administration
C) There is an increased convenience for the nursing staff and patients when the patient receives TNA instead of PN.
D) TNA does not require the use of a micron filter.
Ans: C
Feedback: Intravenous fat emulsions can be admixed with components of PN to create a "three-in-one formulation" commonly called a total nutrient admixture (TNA). The TNA are mixed in one container and administered to the patient over a 24-hour period; a 1.5-micron filter is used with the TNA solution. Advantages of the TNA over PN are cost savings in preparation and equipment, decreased risk of catheter or nutrient contamination, decreased pharmacy preparation time, less nursing time, and increased patient convenience and satisfaction.
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