
Delirium
Confusion Assessment Method (CAM)
Requires 1 + 2 and either 3 or 4:
Acute onset, fluctuating course (changes in mental status, attention deficits)
Inattention (key criterion)
Disorganised thinking
Altered consciousness (hyperalert or drowsy)
Alternative rapid tool: 4AT (validated for quick screening)
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Differentials
Medications/withdrawal (alcohol, illicit drugs)
Sleep deprivation, pain, abuse
B12 deficiency
Infections: UTI, pneumonia
Constipation, urinary retention
Dementia (including Lewy body dementia)
Neurological: Stroke, brain tumour
Organ failure: Respiratory, cardiac, renal
Electrolytes: Hyponatraemia, hypoglycaemia
MI, arrhythmia
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Prevention (also risk factors)
Quiet environment, minimal stimulation
Familiar objects, clocks, calendars
Regular sleep schedule, optimise sleep hygiene
Correct vision/hearing impairments
Adequate pain relief, avoid deliriogenic meds
Proper lighting (day-night cycle support)
Encourage familiar person’s presence
Hydration, nutrition
Avoid restraints unless essential
Structured reorientation, cognitive stimulation
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Management
Non-Pharmacological
Low-stimulus environment, minimise noise
Frequent reorientation, clear/calm communication
Approach from the front, maintain eye contact
Encourage familiar person's presence, ensure personal belongings
Secure sharp objects, one-to-one nursing if needed
Inform family of status changes
Review medications & fluid balance
Pharmacological (if severe behavioural disturbance, hallucinations, or delusions)
First-line: Risperidone 0.25 mg BD (max 1 mg BD)
Second-line: Olanzapine 2.5 mg OD (max 10 mg OD)
Dementia/Lewy body dementia: Low-dose quetiapine
Use lowest effective dose, shortest duration, monitor vitals
For Anxiety/Agitation
Oxazepam 7.5 mg TDS PRN
For Acute Behavioural Changes (Stat Dose)
First-line: Haloperidol or risperidone 0.5 mg PO (repeat in 30 min if needed)
If oral not feasible: Haloperidol 0.5 mg IM
Monitor & adjust therapy based on response & EPSE risk
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