Any cause of decreased oxygenation or perfusion of the brain, MI, PE, CHF, rhythm disturbance, hypotension. I nfections Usually either pneumonia or UTI, but also others, including meningitis. Usually in patient with dementia. M alignancy, especially in CNS . A nemia T rauma E pilepsy Post-ictal state and status epilepticus.
Etiology usually is multifactorial.
If diabetic, get a stat glucose, give oral or IV glucose supplement. Review chart, particularly looking for above causes of delirium. Physical Exam Looking especially at Hydration, Respiratory, Cardiovascular, Neurologic. Ox if any question of oxygenation. Serum levels of digoxin, seizure meds, other drugs where serum levels available, if on these drugs.