Dementia & Delirium

Delirium and dementia are frequently confused, but distinguishing them correctly is one of the highest-yield distinctions in neurological and older-adult nursing content. Delirium is acute (develops over hours to days), has a fluctuating course (a patient may seem lucid one hour and confused the next), and is typically caused by an identifiable, often reversible underlying problem — infection (especially UTI in older adults), medication effects, electrolyte imbalance, hypoxia, or substance withdrawal are common triggers. Dementia, by contrast, is chronic and progressive, developing gradually over months to years, with a generally stable (not fluctuating) level of confusion day to day, and it is not typically reversible.