This flow chart from page 33 of the BPG Delirium, Dementia and Depression in Older Adults: Assessment and Care (2016) provides a concise and systematic overview of the best practice recommendations.
Registered Nurses’ Association of Ontario. (2016). Delirium, Dementia, and Depression in Older Adults: Assessment and Care. Toronto, ON, Canada: Author. Retrieved from http://rnao.ca/bpg/guidelines/assessment-and-care-older-adults-delirium-...