Monitoring Complications in TPN Administration

A nurse is reviewing the new orders for a patient who has been started on Total Parenteral Nutrition (TPN) due to a prolonged gastrointestinal condition that prevents adequate oral intake. The nurse is responsible for administering the TPN and understands the potential complications associated with this therapy. Among the potential complications, the nurse is most concerned about one particular risk that is most commonly associated with TPN. Which complication should the nurse prioritize monitoring for in this patient?