What immediate action should the nurse take if a client receiving TPN via a central line has the solution run out?

When a client receiving total parenteral nutrition (TPN) via a central line has the solution run out, the immediate action that should be taken is to infuse 10% dextrose and water at a specified rate. This is crucial because TPN provides not only essential nutrients but also maintains blood glucose levels. When the TPN solution is suddenly discontinued, the patient is at risk for hypoglycemia due to the absence of glucose supply. Infusing 10% dextrose helps to stabilize blood glucose levels and prevent complications related to sudden drops in glucose.

This action ensures the client continues to receive necessary nutrients and minimizes potential harm until a new TPN solution can be prepared and administered. The rate of infusion, in this case, is calculated based on the previous TPN infusion rate, which helps provide a steady glucose supply.

Other options, although they may seem helpful, do not adequately address the need to prevent hypoglycemia immediately. For instance, infusing normal saline might help maintain venous access but would not provide the required glucose. Discontinuing the IV and flushing with heparin is not appropriate in this scenario, as it would stop necessary nutrient delivery. Obtaining a stat blood glucose level and notifying the healthcare