The patient is on parenteral nutrition and is lethargic. The patient reports thirst and headache and has had increased urination. Which problem does the nurse prepare to address?

A) Hyperglycemia
B) Hypoglycemia
C) Hypercapnia
D) Hypocapnia

Signs and symptoms of hyperglycemia are thirst, headache, lethargy, and increased urination. Hypocapnia is not associated with parenteral nutrition. Hypercapnia increases oxygen consumption and increases CO₂ levels. Ventilator-dependent patients are at greatest risk for this. Hypoglycemia is characterized by diaphoresis, shakiness, confusion, and loss of consciousness.