Sepsis Epidemiology, Definitions, Scoring Systems, and Diagnostic Markers

Sepsis is a life-threatening organ dysfunction resulting from a dysregulated host response to infection. It is a major global health concern due to its high morbidity and mortality. This article provides a comprehensive overview of sepsis, focusing on its epidemiology, definitions, scoring systems, and diagnostic markers. The epidemiology section highlights the global burden of sepsis, noting variations in incidence and mortality across different regions and populations. It also discusses the risk factors associated with sepsis, including age, comorbidities, and healthcare-associated exposures. The definitions section traces the evolution of sepsis definitions, emphasizing the current sepsis-3 criteria, which focus on organ dysfunction as a key diagnostic feature. Scoring systems, such as the Sequential Organ Failure Assessment (SOFA) score and the Quick SOFA (qSOFA) score, are discussed in terms of their components, calculation, and interpretation. The diagnostic markers section details the clinical, laboratory, and microbiological parameters used in sepsis diagnosis, highlighting traditional markers and emerging technologies. The conclusion summarizes the key points and emphasizes the importance of early recognition and adherence to evidence-based guidelines for improving sepsis outcomes.