From: Predisposing factors for delirium in the surgical intensive care unit
A. | Reduced ability to maintain and shift attention to external stimuli |
B. | Disorganized thinking, as indicated by rambling, irrelevant, or |
incoherent speech | |
C. | At least two of the following: |
1. Reduced level of consciousness | |
2. Perceptual disturbances: misinterpretations, illusions, or | |
hallucinations | |
3. Disturbance of sleep-wake cycle with insomnia or daytime | |
sleepiness | |
4. Increased or decreased psychomotor activity | |
5. Disorientation to time, place, or person | |
6. Memory impairment | |
D. | Abrupt onset of symptoms (hours to days), with daily fluctuation |
E. | Either one of the following: |
1. Evidence from history, physical examination, or laboratory tests | |
of specific organic etiologic factor(s) | |
2. Exclusion of non-organic mental disorders when no etiologic | |
organic factor can be identified |