Initial Neurological Workup for Confusion in Older Adults

Initial Assessment

The initial neurological workup for an older adult presenting with confusion should include cognitive screening tools, comprehensive laboratory testing, neuroimaging, and assessment for delirium using validated screening instruments, as recommended by the American College of Emergency Physicians 1, 2
Delirium can be differentiated from dementia using characteristics such as onset, course, attention, consciousness, and hallucinations, with delirium typically having an acute onset, fluctuating course, disordered attention and consciousness, and often present hallucinations, according to the American Geriatrics Society 2, 3
Validated screening tools for delirium assessment include the Brief Confusion Assessment Method (bCAM), as suggested by the American College of Emergency Physicians 2
Cognitive assessment for suspected dementia can be performed using validated screening tools such as the Mini-Mental State Examination (MMSE), Montreal Cognitive Assessment (MoCA), and Mini-Cog, as recommended by the American Diabetes Association 4, 5, 6

Additional laboratory testing based on clinical suspicion may include urinalysis, blood cultures, and medication levels, as suggested by the American College of Emergency Physicians 1, 4, 6

Infections are common causes of delirium in older adults, particularly urinary tract infections and pneumonia, according to the American College of Emergency Physicians 2
Medication review should be performed with special attention to anticholinergics, sedative/hypnotics, and other high-risk medications, as recommended by the American College of Emergency Physicians 1
Cardiovascular assessment should include orthostatic vital signs and EKG to evaluate for cardiac causes, as suggested by the American College of Emergency Physicians 1

Older adults with diabetes have a higher risk of hypoglycemia, which can present as confusion, and glucose levels should be checked promptly, as recommended by the American Diabetes Association 6
Many older adults with cognitive impairment have multiple contributing pathologies, including vascular, neurodegenerative, and metabolic, according to the Alzheimer's Association 7
Functional assessment should evaluate the impact on activities of daily living and instrumental activities of daily living, as suggested by the Alzheimer's Association 3, 4
Non-cognitive markers such as gait speed can be used to assess cognitive decline, with a cut-off below 0.8m/s indicating risk, according to the Alzheimer's Association 3

Delirium is frequently missed in emergency settings, and structured assessment tools should be used rather than clinical impression alone, as recommended by the American College of Emergency Physicians 1
Depression can present with cognitive symptoms in older adults and should be included in the differential diagnosis, according to the Alzheimer's Association 7