What is the typical onset window for delirium in the ICU?

What is the typical onset window for delirium in the ICU?

• A. First 24 hours
• B. On ICU days 2-4
• C. On ICU days 3-5
• D. Only after extubation

Answer: (B)

Delirium in the ICU most often emerges within the first few days after admission, as the cumulative effects of illness and treatments come together. The second to fourth ICU days is the typical window because factors such as sedation, pain, sleep disruption, infection, metabolic disturbances, and hemodynamic instability tend to peak or become most impactful during that early period. While delirium can occur as early as 24 hours after admission or later than day four, the common and most recognizable pattern clinicians look for is around days 2–4. It’s not limited to post-extubation; delirium can occur at any stage of ventilation or even before extubation, so Regular monitoring remains essential throughout the ICU stay.

Delirium in the ICU most often emerges within the first few days after admission, as the cumulative effects of illness and treatments come together. The second to fourth ICU days is the typical window because factors such as sedation, pain, sleep disruption, infection, metabolic disturbances, and hemodynamic instability tend to peak or become most impactful during that early period. While delirium can occur as early as 24 hours after admission or later than day four, the common and most recognizable pattern clinicians look for is around days 2–4. It’s not limited to post-extubation; delirium can occur at any stage of ventilation or even before extubation, so Regular monitoring remains essential throughout the ICU stay.