The RPN is unsure if Henry Picard, age 87, is manifesting symptoms of delirium or dementia. Which question might the nurse ask the Picard family?

Choice A reason: Timeframe is the most significant clinical differentiator between delirium and dementia. Delirium appears suddenly (acute onset), while dementia develops gradually over years. Asking the family "how long" allows the nurse to establish if this is a sudden change from baseline, suggesting a treatable medical cause like an infection. Choice B reason: Agitation or violence can occur in both delirium and the late stages of dementia (sundowning). While important for safety planning, the presence of violence does not help the nurse distinguish between the two conditions because both can involve behavioral dysregulation and a loss of impulse control. Choice C reason: Asking the family for a diagnosis they may not have the expertise to provide is less helpful than gathering observational data. The nurse’s role is to assess current symptoms and history to assist the physician in making a diagnosis, rather than asking the family to confirm one. Choice D reason: Family history is a risk factor for developing certain types of dementia, such as Alzheimer's, but it does not assist the nurse in determining the etiology of Henry's current, acute state of confusion. Genetic predisposition does not rule out the possibility of an acute delirium occurring concurrently.