An unresponsive patient who has type 2 diabetes is brought to the emergency department and diagnosed with hyperosmolar hyperglycemia syndrome (HHS). What should the nurse anticipate doing?

Rationale: A. Giving 50% dextrose: Dextrose 50% is given in severe hypoglycemia, not HHS, since the patient is already hyperglycemic. Administering it would worsen the condition. B. Inserting an IV catheter: The priority in HHS management is rapid fluid replacement with IV access. Severe dehydration is the hallmark of HHS, and IV catheter insertion ensures quick administration of fluids and later insulin. C. Administering glargine (Lantus) insulin: Glargine is a long-acting insulin, not used for acute management of HHS. IV regular insulin is preferred after fluids are started to reduce glucose gradually and avoid cerebral edema. D. Initiating O2 by nasal cannula: Oxygen may be given if hypoxemia is present, but it is not the first-line intervention. The critical priority in HHS is restoring circulation through IV fluids before addressing secondary needs.