A nurse is preparing to administer total parenteral nutrition to a client. Which of the following actions should the nurse take?

The correct answer is A: Keep the solution refrigerated until 1 hr before infusion. Total parenteral nutrition (TPN) is a sterile solution that should be kept refrigerated to maintain its sterility. It should be taken out of the refrigerator about 1 hour before infusion to allow it to reach room temperature and prevent discomfort to the client. Checking the client's WBC count daily (B) is not directly related to administering TPN. Changing the solution every 36 hours (C) is not necessary unless contamination is suspected. Obtaining the client's weight three times a week (D) is important for monitoring the effectiveness of TPN but not a preparation step.