Six hours after starting the TPN infusion, the fingerstick glucose is 215 mg/dL. What action should the nurse take?

Six hours after starting the TPN infusion, the fingerstick glucose is 215 mg/dL. What action should the nurse take?

• A. Slow down the rate of infusion to 30 mL/hr
• B. Call the lab to obtain a stat glucose via venipuncture
• C. Add regular insulin to the infusing TPN solution
• D. Administer insulin using a sliding scale protocol

Answer: (D)

The situation tests how to manage hyperglycemia caused by a continuous TPN dextrose infusion. When glucose starts risen after beginning TPN, the immediate goal is to correct the elevated blood sugar while keeping the nutrition support running. Using insulin with a sliding-scale protocol is the best approach here because it provides rapid, titratable control based on the current glucose reading. This method treats the hyperglycemia promptly and safely without waiting to alter the TPN rate, which typically requires physician orders and careful coordination. It also avoids the potential mismatch that can come with trying to add insulin directly into the TPN bag unless explicitly ordered. Once insulin is started, continue frequent glucose monitoring and adjust the sliding-scale dose as needed to keep glucose within the desired range, typically around 140–180 mg/dL, while the TPN remains ongoing. If glucose remains high despite sliding-scale insulin, that would prompt a new discussion with the provider about modifying the TPN rate or adding insulin directly to the TPN solution, but the first and most appropriate action is to initiate insulin via sliding scale to address the hyperglycemia right away.

The situation tests how to manage hyperglycemia caused by a continuous TPN dextrose infusion. When glucose starts risen after beginning TPN, the immediate goal is to correct the elevated blood sugar while keeping the nutrition support running.

Using insulin with a sliding-scale protocol is the best approach here because it provides rapid, titratable control based on the current glucose reading. This method treats the hyperglycemia promptly and safely without waiting to alter the TPN rate, which typically requires physician orders and careful coordination. It also avoids the potential mismatch that can come with trying to add insulin directly into the TPN bag unless explicitly ordered. Once insulin is started, continue frequent glucose monitoring and adjust the sliding-scale dose as needed to keep glucose within the desired range, typically around 140–180 mg/dL, while the TPN remains ongoing.

If glucose remains high despite sliding-scale insulin, that would prompt a new discussion with the provider about modifying the TPN rate or adding insulin directly to the TPN solution, but the first and most appropriate action is to initiate insulin via sliding scale to address the hyperglycemia right away.