Systemic inflammation and delirium during critical illness

Area of Science:

• Critical Care Medicine
• Neuroscience
• Immunology

Background:

• Delirium and coma are common complications in critically ill patients.
• Understanding the underlying pathophysiology is crucial for timely intervention.

Purpose of the Study:

• To investigate the association between inflammatory markers and endogenous anticoagulant activity with delirium and coma in critically ill patients.

Main Methods:

• Prospective cohort study of 991 adults in intensive care units (ICUs).
• Assessed mental status using RASS and CAM-ICU.
• Measured blood levels of various inflammatory markers (CRP, IFN-γ, IL-1β, IL-6, IL-8, IL-10, IL-12, MMP-9, TNF-α, TNFR1) and protein C.
• Used logistic regression to analyze associations with delirium or coma.

Main Results:

• Higher levels of IL-6, IL-8, IL-10, TNF-α, and TNFR1 were associated with delirium.
• Lower levels of protein C were associated with both delirium and coma.
• Higher levels of CRP and IFN-γ were associated with coma.
• IL-1β, IL-12, and MMP-9 showed no significant association with mental status.

Conclusions:

• Markers of inflammation and endogenous anticoagulant activity are associated with delirium and coma in critical illness.
• These biomarkers may play a role in the development of altered mental status in the ICU.