Psychiatrymiddle twist
An 86-year-old man who lives alone is brought to the emergency department by his daughter because he has been muddled for two days and twice called her by his late wife's name. He takes warfarin for atrial fibrillation, and she mentions in passing that he slipped on the back step four days ago and landed heavily on his side. He is afebrile, oxygen saturation is 96% on room air, capillary glucose is 6.2 mmol/L, and he is drowsy but rousable with no focal weakness. Which one of the following should be arranged first?