RT Book, Section A1 Dunford, John A2 Freeman, Brian S. A2 Berger, Jeffrey S. SR Print(0) ID 1135739124 T1 Coma T2 Anesthesiology Core Review: Part Two Advanced Exam YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9781259641770 LK accessanesthesiology.mhmedical.com/content.aspx?aid=1135739124 RD 2024/04/19 AB Coma is the severest form of impaired consciousness. Coma is a state of apparent sleep that does not respond to a stimulus of any type. Less severe disturbances of consciousness include stupor, which is a state of apparent sleep that will respond to vigorous physical stimulation, and somnolence, which is a state of apparent sleep that will respond to a verbal command. Confusion is often associated with impaired consciousness. An acute confessional state is known as a delirium. If a delirium manifests with thoughts that contain fixed false beliefs, then these are described as delusions. Delirium is usually reversible and can be either hyperactive or hypoactive. This distinction is important to the anesthesiologist as hyperactive delirium with delusions and hallucinations are more often secondary to medications, while hypoactive delirium is often secondary to an organic cause such as hypoglycemia, increased intracranial pressure, or infection. If a confusional state is of a chronic nature, it is considered dementia.