Use the belоw infоrmаtiоn to аnswer the next three (3) questions. Mr. D., а 19-year old college student, has been brought to the emergency department by his roommate. Mr. D. reports abdominal pain, polyuria, vomiting, and thirst. He appears flushed, and his lips and mucous membranes are dry and cracked. His skin turgor is poor. He has deep, rapid respirations, and there is a fruity odor to his breath. He has type 1 diabetes and "may have skipped a few doses of insulin because I'm cramming for finals." He is alert and oriented but is having trouble focusing on the nurse's questions. Mr. D's vital signs and blood glucose are as follows: Blood glucose (fingerstick) 685 mg/dL Blood pressure 100/60 mm Hg Heart rate 120 beats/min Respiratory rate 32 breaths/min Temperature 100.8 degrees F The nurse has completed the triage assessment and history taking. Which action is the priority?