The following case study is worth 50 points. Complete the case study and submit it to the drop box. You can either type your answers directly into the study or you can write them, take a picture and u
Confusion Assessment Method (CAM)
(Adapted from Inouye et al., 1990)
Patient’s Name: Date:
Instructions: Assess the following factors.
Acute Onset
1. Is there evidence of an acute change in mental status from the patient’s baseline?
YES, NO UNCERTAIN NOT APPLICABLE
Inattention
(The questions listed under this topic are repeated for each topic where applicable.)
2A. Did the patient have difficulty focusing attention (for example, being easily distractible or having difficulty
keeping track of what was being said)?
Not present at any time during interview
Present at some time during interview, but in mild form
Present at some time during interview, in marked form
Uncertain
2B. (If present or abnormal) Did this behavior fluctuate during the interview (that is, tend to come and go or
increase and decrease in severity)?
YES, NO UNCERTAIN NOT APPLICABLE
2C. (If present or abnormal) Please describe this behavior.
Disorganized Thinking
3. Was the patient’s thinking disorganized or incoherent, such as rambling or irrelevant conversation, unclear
or illogical flow of ideas, or unpredictable, switching from subject to subject?
YES, NO UNCERTAIN NOT APPLICABLE
Altered Level of Consciousness
4. Overall, how would you rate this patient’s level of consciousness?
Alert (normal)
Vigilant (hyper alert, overly sensitive to environmental stimuli, startled very easily)
Lethargic (drowsy, easily aroused)
Stupor (difficult to arouse)
Coma (unarousable)
Uncertain
Disorientation
5. Was the patient disoriented at any time during the interview, such as thinking that he or she was somewhere
other than the hospital, using the wrong bed, or misjudging the time of day?
YES NO UNCERTAIN NOT APPLICABLE
Memory Impairment
6. Did the patient demonstrate any memory problems during the interview, such as inability to remember
events in the hospital or difficulty remembering instructions?
YES NO UNCERTAIN NOT APPLICABLE
Perceptual Disturbances
7. Did the patient have any evidence of perceptual disturbances, such as hallucinations, illusions, or
misinterpretations (for example, thinking something was moving when it was not)?
YES NO UNCERTAIN NOT APPLICABLE
Psychomotor Agitation
8A. At any time during the interview, did the patient have an unusually increased level of motor activity, such as
restlessness, picking at bedclothes, tapping fingers, or making frequent, sudden changes in position?
YES NO UNCERTAIN NOT APPLICABLE
Psychomotor Retardation
8B. At any time during the interview, did the patient have an unusually decreased level of motor activity, such as
sluggishness, staring into space, staying in one position for a long time, or moving very slowly?
YES NO UNCERTAIN NOT APPLICABLE
Altered Sleep-Wake Cycle
9. Did the patient have evidence of disturbance of the sleep-wake cycle, such as excessive daytime sleepiness
with insomnia at night?
YES NO UNCERTAIN NOT APPLICABLE
Scoring:
For a diagnosis of delirium by CAM, the patient must display:
1. Presence of acute onset and fluctuating discourse
AND
2. Inattention
AND EITHER
3. Disorganized thinking
OR
4. Altered level of consciousness
Source:
Inouye SK, van Dyck CH, Alessi CA, Balkin S, Siegal AP, Horwitz RI. Clarifying confusion: the confusion
assessment method. A new method for detection of delirium. Ann Intern Med. 1990;113(12):941-948.
Confusion Assessment Method (CAM) Diagnostic Algorithm
Feature 1: Acute Onset and Fluctuating Course
This feature is usually obtained from a family member or nurse and is shown by positive
responses to the following questions: Is there evidence of an acute change in mental status
from the patient's baseline? Did the (abnormal) behavior fluctuate during the day; that is, did it
tend to come and go, or increase and decrease in severity?
Feature 2: Inattention
This feature is shown by a positive response to the following question: Did the patient have
difficulty focusing attention; for example, being easily distractible, or having difficulty keeping
track of what was being said?
Feature 3: Disorganized Thinking
This feature is shown by a positive response to the following question: Was the patient's
thinking disorganized or incoherent, such as rambling or irrelevant conversation, unclear or
illogical flow of ideas, or unpredictable switching from subject to subject?
Feature 4: Altered Level of Consciousness
This feature is shown by any answer other than "alert" to the following question: Overall, how
would you rate this patient's level of consciousness? (alert [normal], vigilant [hyperalert],
lethargic [drowsy, easily aroused], stupor [difficult to arouse], or coma [unarousable])
Source:
Inouye SK, van Dyck CH, Alessi CA, Balkin S, Siegal AP, Horwitz RI. Clarifying confusion: the confusion
assessment method. A new method for detection of delirium. Ann Intern Med. 1990;113(12):941-948.
