Which action is important when caring for a client receiving total parenteral nutrition (TPN)?

Monitoring the client's capillary blood glucose level every four hours is crucial when caring for a client receiving total parenteral nutrition (TPN) because TPN solutions are high in carbohydrates, which can lead to fluctuations in blood sugar levels. Clients receiving TPN are at a higher risk for hyperglycemia due to the glucose content in the solution, so regular monitoring allows for timely interventions if glucose levels rise above the normal range. This practice is essential to prevent complications such as hyperglycemic crises, which can severely affect the client’s health.

While monitoring vital signs every hour or limiting the intake of oral fluids are practices that may be relevant in certain contexts, they are not as directly related to the specific risks associated with TPN. Documenting TPN administration times is important for accurate record-keeping and ensuring proper management of the therapy, but it does not address the immediate health risks posed by the nutritional solution itself. Therefore, blood glucose monitoring takes precedence as it directly impacts the patient's metabolic stability and safety.