The nurse is caring for a 73-year-old client admitted to the Emergency Department at 2130. The client arrived to the ED via ambulance after their partner found them slumped in a chair. Vital signs are blood pressure 179/93, heart rate 112 and irregular, respiratory rate 24 with oxygen saturation 93 percent. Assessment reveals acute confusion, slurred speech, ataxia, and a slow response to tasks and commands. Pupils are sluggish to react, right grip stronger than left, and a mild facial droop is noted on the left. Home medications include Glyburide 5 mg daily, Apixaban 2.5 mg daily, and Sertraline 50 mg daily. Of the choices below, what testing does the nurse determine to have the lowest priority at this time?