Delirium: presentation, epidemiology, and diagnostic evaluation (part 1)

Area of Science:

• Neuroscience
• Psychiatry
• Geriatrics

Background:

• Delirium is a prevalent, complex neuropsychiatric disorder characterized by attentional deficits, cognitive disturbances, and altered behavior, perception, and sleep.
• It stems from various toxic, metabolic, infectious, and structural causes, often leading to adverse outcomes.
• The behavioral symptoms of delirium are frequently misdiagnosed as primary psychiatric conditions.

Purpose of the Study:

• To outline the key features, diagnostic approaches, and management strategies for delirium.
• To emphasize the importance of differentiating delirium from primary psychiatric disorders.

Main Methods:

• Diagnostic assessment involves comprehensive physical examination, cognitive testing, metabolic and infectious workups, medication review, and neuroimaging/EEG as needed.
• Evaluation of existing pharmacologic and non-pharmacologic interventions for delirium management.

Main Results:

• Delirium pathophysiology involves disruptions in multiple neurotransmitter systems.
• Both pharmacologic and non-pharmacologic interventions have demonstrated efficacy in reducing delirium incidence and severity.
• Antipsychotics are identified as the primary treatment for managing agitation and psychosis associated with delirium.

Conclusions:

• Accurate diagnosis of delirium requires a multi-faceted approach considering its diverse etiologies and impact on neurotransmitter systems.
• Timely and appropriate interventions, including antipsychotic use for specific symptoms, are crucial for improving patient outcomes.
• Distinguishing delirium from primary psychiatric conditions is essential for effective treatment and management.