An older patient was admitted with a fractured hip after being found on the floor of her home. She was extremely malnourished and started on parenteral nutrition (PN) 3 days ago. Which assessment finding would be of most concern to the nurse?
a). Blood glucose level of 125 mg/dL
b). Serum phosphate level of 1.9 mg/dL
c). White blood cell count of 10,500/µL
d). Serum potassium level of 4.6 mEq/L