TY - CHAP M1 - Book, Section TI - Delirium A1 - Ting Hshieh, Tammy A1 - Inouye, Sharon K. A2 - Williams, Brie A. A2 - Chang, Anna A2 - Ahalt, Cyrus A2 - Chen, Helen A2 - Conant, Rebecca A2 - Landefeld, C. Seth A2 - Ritchie, Christine A2 - Yukawa, Michi PY - 2014 T2 - Current Diagnosis & Treatment: Geriatrics, 2e AB - Clinical diagnosis based on detailed history, cognitive assessment, and physical and neurologic examination.The pathognomonic feature is an acute change in baseline mental status developing over hours to days.Other key features include fluctuating course with an increase or decrease in symptoms over a 24-hour period; inattention, with difficulty focusing attention; and either disorganized thinking, such as rambling or incoherent speech, or altered level of consciousness (vigilant or lethargic).Perceptual disturbances, such as hallucinations, or paranoid delusions present in approximately 15% to 40% of cases.Search for organic or physiologic causes (eg, illness, drug related, or metabolic derangement).Delirium is often misdiagnosed as dementia, depression, or psychosis.Accepted delirium criteria provided by Confusion Assessment Method. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/18 UR - accessmedicine.mhmedical.com/content.aspx?aid=1100066087 ER -